VAX-11/750 & VAX-11/751 Revision Control

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_ K-RM-1175X Rev A, VAX 11/750 & 11/751 Revision Control Document, Nov 1990

                11/750 AND 11/751 REVISION CONTROL DOCUMENT

                -------------------------------------------

           =========================================================
           |              CHANGES IN THIS UPDATE                   |
           |                                                       |
           |    WILL BE NOTED BY AN " ** "  IN THE LEFT MARGIN     |
           =========================================================

                             TABLE OF CONTENTS
                             -----------------
                                                                Page
              1.0   INTRODUCTION................................. 1
**                  1.1  11/750 System Chart
**                  1.2  11/750 Revision Summary Chart

              2.0   REVISION CRITERIA............................ 7

              3.0   11/750 KERNEL REVISION CONTROL............... 7

                    3.1  Kernel Identification Register Hardware
                          Rev Level

                    3.2  SID Register H/W Rev Problem
                    3.3  Microcode Revision History
                    3.4  Module Revision History

              4.0   MODULE REVISION HISTORY...................... 10

              5.0   11/750 KERNEL REVISION HISTORY............... 11

                    5.1  Module Revision Charts - 11/750 Kernel
                    5.2  11/750-50 Kernel Revision Summary (VAX750-R-0005)
                    5.3  11/750-58 Kernel Revision Summary       "
                    5.4  11/750-60 Kernel Revision Summary (VAX750-R-0006)
                    5.5  11/750-68 Kernel Revision Summary       "
                    5.6  11/750-70 Kernel Revision Summary (VAX750-R-0007)
                    5.7  11/750-78 Kernel Revision Summary       "
                    5.8  11/750-7C Kernel Revision Summary       "
                    5.9  11/750-80/88/8C Kernel Revision Summary (11750-8-I008)
                    5.10 11/750-90/98/9C Kernel Revision Summary (11750-9-I009)

              6.0   OPTION REVISION HISTORY.......................27

                    6.1  RH750 - Massbus Adapter
                    6.2  FP750 - Floating Point
                    6.3  KU750 - User WCS
                    6.4  DW750 - Second Unibus
                    6.5  DR750 - General Purpose Interface
                    6.6  KC750 - Remote Diagnosis
                    6.7  CI750 - Computer Interconnect - 11/750


Date:     NOV 8, 1990
Updates:  Rose Murphy
          CSSE





1.0     INTRODUCTION

        This document is intended to define the revision history of the VAX
        11/750 system for purposes of identifying the compatible hardware,
        diagnostics, firmware, and operating system software.  (All references
        to the 11/750 apply to the 11/751 as well, unless otherwise noted.)

        NOTE:  All references to Rev. 00-04 have been deleted.  It is assumed
        all field machines are at minimum Rev 5.

        This document will be updated on a quarterly basis and released to
        microfiche in the VAX Library Update and the Speed Bulletin.

        The following VAX LIBRARY CARDS will be required as reference to the
        revision control plan. This document will state the source of
        information necessary for understanding firmware, diagnostic, and
        system software compatibility.

                        INITIAL STARTING DOCUMENTATION
        DOCUMENT        DESCRIPTION
        ----------------------------------------------------------------------
        ZZ-EVNDX-W.0    VAX Diagnostic Index

        ZZ-ECOAB-1.0    VAX 11/750 Control Store
                                   Microcode Listing
                                   CMT050
        ZZ-ECOAD-1.0    VAX 11/750 Boot Rom Listing
                                   TU58
                                   RK07
                                   RL02
        ----------------------------------------------------------------------

1.1  11/750 COMPATIBILITY CHART
     --------------------------
     The following chart summarizes the compatible hardware, software,
     microcode and diagnostic revision levels for each system revision.
     For information concerning the corresponding module revisions for
     the kernel and option modules, see sections 5.1 and 6.

     The system revision reflects the rev of the overall 11/750 system.
     Only an increase to the kernel rev will increment the system revision;
     thus, the kernel revision and system revision will always be the
     same.

     The implementation of the SID switch reverses the bit positions of
     the SID register to be able to read the 11/750 hardware revision as
     well as the backplane revision.  (See Section 3.0 and 3.1).

    (Refer to Option Revision sections for module revision information.)




----------------------------------------------------------------------
11750 SYSTEM REV SID|  50/58  |  60/68  | 70/78/7C |80/88/8C |90/98/9C
----------------------------------------------------------------------
       KERNEL       |  50/58  |  60/68  |70/78/7C  |80/88/8C |90/98/9C
   -------------------------------------------------------------------
       RH750        |   01    |   01    |   01     |  01     |  01
       FP750        |  01,02  |  01,02  |   02     |  02     |  02
       KU750        |   01    |   01    |   01     |  01     |  01,02
       DR750        |   01    |   01    |   01     |  01     |  01
       DW750        |  01,02  |  01,02  |   02     |  02     |  02
       KC750        |   01    |   01    |   01-C*  |  01-C*  |01-C*
       CI750        | B1-E1   |  B1-E1  |   B1-F1  |B1-F1    |B1-H3
----------------------------------------------------------------------
 EVNDX (Minumum)    |   12,18 |   15,18 |15,18,    |15,18,   | 34
----------------------------------------------------------------------
** VMS RELEASE      | 3.X,4.X | 3.X,4.X |3.X,4.X,  |3.X,4.X, |5.X
----------------------------------------------------------------------
** CPU MICROCODE    | 096,097 |   098   | 098,099  |098,099  |103
----------------------------------------------------------------------


 Notes:
 ------

  o  VMS V 4.0 will require minimum hardware Rev 50/58 (i.e. L0008) and
     minimum ucode Rev 98 FOR CI750 SYSTEMS with no UDA50s.

  o  11/750 systems with UDA50s and CIs must be at Rev 7 prior to VMS V4.0
     upgrades and UDA50 must be at Rev 5.

  o  UDA50A Rev 5 refers to ucode Version 5.

  o  Minimum rev for CI750 is B1.  It is recommended that all CI750s be
     upgraded to the current rev.

*    "C" = new convention for tracking options. See below for further
           explanation.

     Old Rev "00" =A
             "01" =B

     11750 CPU with a CI750 must have 4MB of physical memory.

   o  CMT103 is required for VMS V5.0.





1.2  11/750 REVISION SUMMARY CHART
     -----------------------------
Hardware changes noted under each system revision reflect changes to the
kernel for each system revision.  New system ID info also noted.  VMS
and microcode revision are noted for compatibility purposes.  The
revisions are minimum revisions.

===============================================================================
11750 SYSTEM REV        50                      58
===============================================================================
Hardware:
--------

        L0003           E=C;CS=C2;MR=F          E=C;CS=C2;MR=F
                        E=D;CS=F;MR=F           E=D;CS=F;MR=F
11/750                  QC=E103 is DC651        QC=E103 is DC651
KERNEL                  DC651                   DC651
        -----------------------------------------------------------------------
        L0004           E=D;CS=J1;MR=K          E=D;CS=J1;MR=K
                        E=E;CS=K;MR=K           E=E;CS=K;MR=K
                        QC=E135 is              QC=E135 is
                        23-991A9                23-991A9
        -----------------------------------------------------------------------
        L0008-YA        E=B;PR=A1               E=B;PR=A1
        -----------------------------------------------------------------------
        L0008-YB        E=B;PR=C2               E=B;PR=C2
        -----------------------------------------------------------------------
        L0016                                   E=B;CS=B
                                                QC=Wire from
                                                E7-15 to E8-11
        -----------------------------------------------------------------------
        70-16486         WL=B                   WL=C
        Bkpnl
-------------------------------------------------------------------------------
DW750   L0010            E=C;PR=C1              E=C;PR=C1
                         QC=E50 is 23-991A9     QC=E50 is 23-991A9
-------------------------------------------------------------------------------
KC750   L0006            E=A;CS=*3              E=A;CS=*3
                         E=B;CS=B1              E=B;CS=B1
                         E=C;CS=D               E=C;CS=D
                         QC=Wires on E6-3,4     QC=Wires on E6-3,4
-------------------------------------------------------------------------------
VMS REL:                  3.X,4.X               3.X,4.X
-------------------------------------------------------------------------------
MICROCODE:               CMT096/CMT097      CMT096/CMT097
-------------------------------------------------------------------------------
SYSTEM ID:
 Rev B Bkpl              02006050/02006150
 ------------------------------------------------------------------------------
 Rev C Bkpl                                 02006058/02006158
 ------------------------------------------------------------------------------
 Rev D bkpl
Key:
---     E = Etch Rev       CS = Circuit Schematic Rev   MR = Module Rev
      * PR = Part Rev      QC = Quick Check             WL = Wire List Rev

* See Section 4.0 - Module Revision History - for explanation




===============================================================================
11750 SYSTEM REV       60                       68
===============================================================================
Hardware:
---------
        L0003      E=C;PR=H1                    E=C;PR=H1
11/750             E=D;PR=H2                    E=D;PR=H2
Kernel             QC=E4 is                     QC=E4 is
                   74S00                        74S00
        ----------------------------------------------------------------------
        L0003-YA   E=E1;PR=C1                   E=E1;PR=C1
                 QC=ETCH #50-13693-01           QC=ETCH #50-13693-01
        ----------------------------------------------------------------------

        L0004      E=D;PR=L1                    E=D;PR=L1
                   E=E;PR=L2                    E=E;PR=L2
                   QC=Jmpr between              QC=Jmpr between
                     E46 1 & 2                  E46 1 & 2
        ----------------------------------------------------------------------
        70-16486   WL=B                         WL=C
        Bkpnl
-----------------------------------------------------------------------------
DW750   L0010      E=C;PR=E1                    E=C;PR=E1
                   QC for E1                    QC for E1
                   - Jumper                     - Jumper
                   between E56.11               between E56.11
                    & E24.5                     & E24

                    QC for F1                   QC for F1
                    - Ram @ E55                 - Ram @ E55
                        is 9122                 is 9122
-----------------------------------------------------------------------------
FP750   L0001       E=D;PR=E2                   E=D;PR=E2
                    E=E;PR=E1                   E=E;PR=E1
                    QC=R33 is 75                QC=R33 is 75
                    OHM resistor                OHM resistor
-----------------------------------------------------------------------------
**VMS REL:          3.X,4.X                     3.X,4.X
-----------------------------------------------------------------------------
**MICROCODE:        CMT098/CMT099               CMT098/CMT099
-----------------------------------------------------------------------------
SYSTEM ID:
 Rev B Bkpl        02006260
 ----------------------------------------------------------------------------
 Rev C Bkpl                                     02006268
 ----------------------------------------------------------------------------
Key:
---     E = Etch Rev    PR = Part Rev   QC = Quick Check

NOTE:  The above system revisions were cancelled.




===============================================================================
11750 SYSTEM REV       70             78                7C
===============================================================================
Hardware:
---------
        L0003      E=C;PR=J1,K1     E=C;PR=J1,K1     E=C;PR=J1,K1
11/750             E=D;PR=J2,K2,K3  E=D;PR=J2,K2,K3  E=D;pr=J2,K2,K3
Kernel             QC=E109 pins    QC=E109 pins      QC=E109 pins
                   4,5,6 grounded  4,5,6 grounded     4,5,6 grounded

        ----------------------------------------------------------------------
        L0003-YA   E=E1;PR=C1       E=E1;PR=C1       E=E1, PR=C1
         QC=ETCH #50-13693-01   QC=ETCH #50-13693-01  QC=ETCH #50-13693-01
        ----------------------------------------------------------------------

        L0004      E=D;PR=M1,N1,    E=D;PR=M1,N1,     E=D;PR=M1,N1,
                   E=E;PR=M2,N2,    E=E;PR=M2,N2,     E=E;PR=M2,N2,
                   QC=E11 is        QC=E11 is         QC=E11 is
                     23-656A2-00      23-656A2-00     23-656A2-00

        ----------------------------------------------------------------------
        70-16486   WL=B             WL=C                WL=D
        Bkpnl
-----------------------------------------------------------------------------
DW750   L0010     E=C;PR=E1        E=C;PR=E1            E=C;PR=E1
                  QC for E1        QC for E1            QC for E1
                  - Jumper         - Jumper             - Jumper
                  between E56.11   between E56          between E56
                  & E24.5           & E24.5             & E24.5
-----------------------------------------------------------------------------
** VMS REL:       3.X,4.X,         3.X,4.X              3.X, 4.X
-----------------------------------------------------------------------------
** MICROCODE:     CMT098-CMT99   CMT098-CMT99           CMT098/CMT99
-----------------------------------------------------------------------------
SYSTEM ID:
 Rev B Bkpl      02006270
 ----------------------------------------------------------------------------
 Rev C Bkpl                     02006278
 ----------------------------------------------------------------------------
 Rev D Bkpl                                                0200637C

Key:
---     E = Etch Rev    PR = Part Rev   QC = Quick Check





===============================================================================
11750 SYSTEM REV       80             88                8C
===============================================================================
Hardware:
---------
        L0003      E=C;PR=J1,K1     E=C;PR=J1,K1     E=C;PR=J1,K1
11/750             E=D;PR=J2,K2,K3  E=D;PR=J2,K2,K3  E=D;pr=J2,K2,K3
Kernel             QC=E109 pins    QC=E109 pins      QC=E109 pins
                   4,5,6 grounded  4,5,6 grounded     4,5,6 grounded

        ----------------------------------------------------------------------
        L0003-YA   E=E1;PR=C1       E=E1;PR=C1       E=E1, PR=C1
         QC=ETCH #50-13693-01   QC=ETCH #50-13693-01  QC=ETCH #50-13693-01
        ----------------------------------------------------------------------

        L0004      E=D;PR=M1,N1,    E=D;PR=M1,N1,     E=D;PR=M1,N1,
                   E=E;PR=M2,N2,    E=E;PR=M2,N2,     E=E;PR=M2,N2,
                   QC=E11 is        QC=E11 is         QC=E11 is
                     23-656A2-00      23-656A2-00     23-656A2-00

        ----------------------------------------------------------------------
        70-16486   WL=B             WL=C                WL=D
        Bkpnl
-----------------------------------------------------------------------------
DW750   L0010     E=C;PR=E1        E=C;PR=E1            E=C;PR=E1
                  QC for E1        QC for E1            QC for E1
                  - Jumper         - Jumper             - Jumper
                  between E56.11   between E56          between E56
                  & E24.5           & E24.5             & E24.5
-----------------------------------------------------------------------------
** VMS REL:       3.X,4.X          3.X,4.X              3.X, 4.X
-----------------------------------------------------------------------------
** MICROCODE:     CMT098-CMT99   CMT098-CMT99           CMT098/CMT99
-----------------------------------------------------------------------------
SYSTEM ID:
 Rev B Bkpl      02006280
 ----------------------------------------------------------------------------
 Rev C Bkpl                     02006288
 ----------------------------------------------------------------------------
 Rev D Bkpl                                                0200638c

Key:
---     E = Etch Rev    PR = Part Rev   QC = Quick Check





===============================================================================
11750 SYSTEM REV       90             98                9C
===============================================================================
Hardware:
---------
        L0003      E=C;PR=J1,K1     E=C;PR=J1,K1     E=C;PR=J1,K1
11/750             E=D;PR=J2,K2,K3  E=D;PR=J2,K2,K3  E=D;pr=J2,K2,K3
Kernel             QC=E109 pins    QC=E109 pins      QC=E109 pins
                   4,5,6 grounded  4,5,6 grounded     4,5,6 grounded

        ----------------------------------------------------------------------
        L0003-YA   E=E1;PR=C1       E=E1;PR=C1       E=E1, PR=C1
         QC=ETCH #50-13693-01   QC=ETCH #50-13693-01  QC=ETCH #50-13693-01
        ----------------------------------------------------------------------

        L0004      E=D;PR=M1,N1,    E=D;PR=M1,N1,     E=D;PR=M1,N1,
                   E=E;PR=M2,N2,    E=E;PR=M2,N2,     E=E;PR=M2,N2,
                   QC=E11 is        QC=E11 is         QC=E11 is
                     23-656A2-00      23-656A2-00     23-656A2-00

        ----------------------------------------------------------------------
        70-16486   WL=B             WL=C                WL=D
        Bkpnl
-----------------------------------------------------------------------------
DW750   L0010     E=C;PR=E1        E=C;PR=E1            E=C;PR=E1
                  QC for E1        QC for E1            QC for E1
                  - Jumper         - Jumper             - Jumper
                  between E56.11   between E56          between E56
                  & E24.5           & E24.5             & E24.5
-----------------------------------------------------------------------------
VMS REL:          5.0                5.0                 5.0
-----------------------------------------------------------------------------
MICROCODE:        CMT103           CMT103               CMT103
-----------------------------------------------------------------------------
SYSTEM ID:
 Rev B Bkpl      02006290
 ----------------------------------------------------------------------------
 Rev C Bkpl                     02006298
 ----------------------------------------------------------------------------
 Rev D Bkpl                                                0200639C

Key:
---     E = Etch Rev    PR = Part Rev   QC = Quick Check





2.0     REVISION CRITERIA

        Architectural or functional changes in the system must cause a change
        of the kernel revision level. This includes changes to the hardware
        that change performance or operation of the system that is detectable
        to the diagnostics and operating system software. Modifications to
        cables, power subsystems, ventilation equipment, or mechanical design
        should not cause a change to the kernal revision level. The VAX 11/750
        revision history for a particular subsystem or option will be desig-
        nated as follows...
                                OPTION-XXN

        where, OPTION is the five letter neumonic (i.e. KA750), XX is a fun-
        tional change description code (i.e 01), and N is a non-functional
        change to the option. Non-functional changes to an option include
        relayout of modules to eliminate rework wires or changes to document-
        ation that do not affect operation of the system. Changes to purchase
        part numbers at the module level should not cause the hardware revision
        to be raised either. Functional changes to any of the modules in the
        kernel subsystem (i.e. KA750 CPU and MS750) increments each module
        revision, as well as the kernel revision.

        A switch pack and pull up resistor assembly has been designed and was
        installed in all Rev "C" backplanes shipped from manufacturing: in
        11/750 CPUs, beginning with Serial No. BTO3096, and 11/751 CPUs,
        beginning with Serial No. BTO215. The switch pack will be set by
        manufacturing before it is shipped.  Switch pack settings will change
        as a result of a kernel revision change to the 11/750 CPU.  This will
        be done by an ECO.


3.0     VAX 11/750 KERNEL REVISION CONTROL

        The VAX 11/750 processor has a system identification register (SID)
        register similiar to the VAX 11/780 processor; however, there are
        two basic differences between the VAX 11/750 and VAX 11/780 processor
        SID registers. These are...

                * VAX 11/750 SID does NOT contain the system serial number
                * VAX 11/750 SID DOES contain a field describing current
                                 control store microcode revision. This is
                                 because VAX 11/750 does not have the FPLA to
                                 intercept ECO'd microcode locations.

        The figure 2-1 illustrates the format of the VAX 11/750 system
        identification register (SID). This register is accessible to macro
        code and the console terminal through IPR address ^X3E. Examination of
        the register shows 4 bytes, 3 of which are functional. The high byte
        is the processor type code byte used by the diagnostics and operating
        system to decide which type of processor the software is operating on.
        Known type codes are listed below.

                        TYPE CODE BYTE          PROCESSOR
                           00000000             undefined
                           00000001             VAX 11/780
                           00000010             VAX 11/750
                           00000011             VAX 11/730




        Byte 2 of the SID register is always zero.

        Byte 1 of the SID register is the microcode revision of the control
        store. This number is generated by the microprogrammer in the
        REV750.MIC file of the microcode listing ECOAB. There is a MICRO2
        assembler directive called .SET/MICROREV=version at the top of the
        page which is upgraded for each major assembly of the the microcode.
        In the MFPR microinstruction flows this equated value is substituted
        into the short literal field of the microinstruction and becomes the
        microcode revision that appears in byte 1 of the SID register. The
        number following MICROREV is DECIMAL. You must convert the hex byte to
        decimal after examining the SID register.

        Byte 0 of the SID register is the hardware revision of the kernal and
        the backplane rev. Both of these revisions are programmable on the CPU
        backplane via the Kernal Revision Level Input Device.
        (See section 3.1 for more detailed information.)

        There is a 74LS244 tri-state driver on the UBI module that interfaces
        to the CPU WBUS. The MFPR microinstruction flows read this byte when
        referencing the SID register.  The number in byte 0 of the SID
        register is a BINARY revision level programmed on the SID input device.

        SID REGISTER FORMAT                             IPR ADDRESS ^X3E
        +----------------+---------------+---------------+---------------+
        |                |               |               |               |
        |    00000010    |    00000000   |   00110010    |    00000000   |
        |                |               |               |               |
        +----------------+---------------+---------------+---------------+

          TYPE CODE = 2     MUST BE 0     MICROCODE REV    HARDWARE REV
            (Byte 3)        (Byte 2)        (Byte 1)         (Byte 0)

                                Figure 2-1

  NOTE: This example shows the type code as 2 (VAX 11/750), Microcode rev-
  ----  ision is 32 hex or 50 decimal, and the hardware revision level is
        equal to zero zero.

3.1     Kernel Identification Register Hardware Revision Level Input Device

        The Kernel ID Register switch pack and pull-up assembly attaches
        across slots 3 and 4 section B of the backplane.  Backplane pins
        will protrude through the PC board and pins used will have a female
        socket that is easily grasped with a scope probe.




        The following diagrams show what the switch pack actually looks
        like; the section containing the bits that must be set is
        depicted in a larger scale at the right.


            +----------------+                                REG BIT POSITION
            |     SYS ID     |     7  6  5  4  3  2  1  0  <- ETCHED ON BOARD
          +-|    76543210    | O +------------------------+
          | -A  +--------+   | F | 1  2  3  4  5  6  7  8 |<- SWITCH NUMBER
          | -C  |12345678|   | F |------------------------|   STAMPED ON
          | -E  ||||||||||   |   || || || || || || || || ||   SWITCH-PAK
          | -   +--------+   |   || || || || || || || || ||
          | -    5415142     |   || || || || || || || || ||
          | -   5015141A     |   +------------------------+
          | -   +--------+   |
          | -   |DIGITAL |   |
          | -   +--------+   |            OFF = 1
          | -   +---------+  |
          | UU  |RES PAK  |  |
          +-|   +---------+  |
            |    SIDE 1      |
            +----------------+

        Bits 7 - 4 (1 - 4) represent the Kernal Rev; bits 3 - 0  (5 - 8)
        represent the backplane Rev.  Backplane rev - 0 = Rev B; 8 - Rev C.
        NOTE THAT ONLY REV C BACKPLANES WILL SUPPORT 64K MEMORY.

        Example for Revision 50 (Kernal Rev 5; Backplane Rev B)

                                           REG BIT POSITION
                7  6  5  4  3  2  1  0  <--ETCHED ON BOARD
            0 +------------------------+
            F | 1  2  3  4  5  6  7  8 |<--SWITCH NUMBER STAMPED
            F |------------------------|   ON SWITCH PACK
              ||O||O||O||O||O||O||O||O||
              ||N||F||N||F||N||N||N||N||
              || ||F|| ||F|| || || || ||
              +------------------------+   (OFF = 1)

        Example of Revision 58 (Kernal Rev 5; Backplane Rev C)

                                           REG BIT POSITION
                7  6  5  4  3  2  1  0  <--ETCHED ON BOARD
            0 +------------------------+
            F | 1  2  3  4  5  6  7  8 |<--SWITCH NUMBER STAMPED
            F |------------------------|   ON SWITCH PACK
              ||O||O||O||O||O||O||O||O||
              ||N||F||N||F||F||N||N||N||
              || ||F|| ||F||F|| || || ||
              +------------------------+   (OFF = 1)

        All Rev "B" backplanes in the field will have the switch installed
        via FCO. This device is included in the VAX 11/750 Rev 7 FCO kits -
        EQ-01201-01 and EQ-01201-02.  Instructions on how to install and set
        the switch are included in the Rev 7 FCO document.




        The parts can also be obtained by ordering the following parts:

                        54-15142        SID Switch
                        12-16821-00     Backplane Housing Connector


3.2     SID Register Hardware Revision Problem

        The current design of the SID register hardware revision byte 0, has
        an 8 bit 74LS244 tri-state driver chip interfaced to the backplane. The
        chip inputs are not inverted in the driver and are not pulled up either.
        so the resultant data with SID register byte 0 not programmed is FF.
        Since the inputs just "floats" at times the output may not always be FF.
        This is a problem when running the DIAGNOSTIC SUPERVISOR. The super-
        visor "forgets" where it came from and the program data must be enter-
        ed manually to get the supervisor to "remember" where it came from.
        This is time consuming, especially if the field engineer must power the
        machine up and down to replace modules. The result is the MTTR is ex-
        tended to repair the machine. The register must be wired HI or LO, but
        wiring the bits HI is another problem. The CPU power supply must be
        connected to the chip inputs directly. If the 74LS244 fails by shorting
        the input pin to ground, hopefully the chip will burn open, but if not,
        other damage could result. There should be a pulled up +5V through a
        1K resistor to several unused backplane pins.

3.3     Microcode Revision History

        A comprehensive revision history of VAX 11/750 microcode is contained
        in the microcode listing in the VAX LIBRARY fiche set (ECOAB 3.0).
        Revision W of the VAX LIBRARY contains the microcode listing for
        control store version CMT050. Since there have been numerous changes
        to the microcode since version CMT050, it is suggested that you read
        the microcode revision history contained in the REV750.MIC file of
        the microcode listing. Changes to the VAX 11/750 microcode AFTER
        CMT062 will be described briefly in this document and what the
        symptoms and corrective actions were.  CMT098 will be available in
        release 19 as ECOAB98.0 on microfiche.

4.0     MODULE REVISION HISTORY

        Modules are marked in one of three ways:  CS (Circuit Schematic)
        Revision, MR (Module Revision) or PR (Part Revision).  DEC Standard 012
        institutes Part Revision and is being implemented on all 11/750
        modules.  All new modules will use Part Revision. Part Revision always
        consists of a letter and a number, i.e. A1 or A2.  The letter is
        increased for a functional change; the number is incremented for a
        non-functional change.

        Part Revision will be implemented on existing 11/750 modules, as ECOs
        occur, by using the current CS revision.  CS Rev "D" becomes Part Rev
        "D1" for a non-functional change; for a functional change, the Part
        Rev would be "E1".




        The revision is noted on each module by either a brady marker or a red
        stamp on the tab of the module handle.  If both are present, the brady
        marker should represent the latest revision.  (It is wise to do a quick
        check, if possible, to insure that this is correct!)

        Compatible revisions for each part (unit) are separated by commas;
        also, revisions separated by a dash, i.e. A1-C2, means that those
        revisions, plus whatever is in between, are compatible.  Any special
        requirements (specific revisions for certain configurations, etc.)
        will be noted in the revision summary section.  Revisions noted are
        all minimum revisions.


5.0     11/750 KERNEL REVISION HISTORY
        ------------------------------

        Listed below is the revision history of the 11/750 kernel, indicating
        the compatible module and/or subsystem revisions for each hardware
        revision.  Equivalent module revisions are separated by commas.

        The 11/750 kernel consists of the KA750 CPU and the MS750 (AA and CA).
        ----------------------------------------------------------------------
                KA750   -       70-16486        CPU Backplane Asembly
                                L0002           DPM Module
                                L0003           MIC Module
                                   or
                            *   L0003-YA        MIC Module
                                L0004           UBI Module
                            **  L0005           CCS Module
                                L0008-YA        PCS Module (Non-User WCS)
                                 -or-
                                L0008-YB        PCS Module (User WCS)
                                TU58-XA         Tape Drive Unit
                                54-13489        TU58 Tape Controller Unit
                                M9313           UET Unibus Terminator/
                                                  Exerciser
                MS750-AA        L0011           CMC Module
                                M8728           256KB array board

                MS750-CA        L0016           Controller
                                M8750           1MB array board

                MS750-HB        L0022           Controller
                                M7199           4 MB array board

        --------------------------------------------------------------------

        *   The kernel will also contain EITHER an L0003 or a
            L0003-YA module--not both! The L0003-YA was introduced as a Cost
            Reduced module with TB and Cache Address Termination.

        **  Note that the kernel contains EITHER an L0005 OR an L0008 -
            not both!!!!  All L0005s in the field were replaced with
            L0008s as part of FCO VAX11/750-R-0005.




        This history has been separated into three charts:

           Chart 1 - Rev "B" backplane - SID Switch Setting = xxxxxxx0

           Chart 2 - Rev "C" backplane - SID Switch Setting = xxxxxxx8

           Chart 3 - Rev "D" backplane - SID Switch Setting = xxxxxxxC

**NOTE:  All revisions below Revision 5X have been removed from this document.
         This is because all systems should be at a minimum of revision 5.
         Older system revisions are no longer supported.

    KA750-A REVISION SUMMARY
    ------------------------

    o   This is the first introduction of rev control for the KA750.  Up
        to this point, revisions were tracked at the Kernel level only.

    o   This revision implements ECO L0004-MKO10 and fixes two problems
        with the UBI:

        1 - UBI looses device interrupts.

        2 - When the UBI is the Bus Master, it deasserts BBSY at the
            same time as MSYN L, allowing no deskew time for the address
            and control lines.

    o   FCO KA750-A-I-001 was made available to those customers who
        experienced either of the above two problems. Not all systems require
        the fix.

 5.1    Kernel Module Revision Charts

        Charts 1, 2 and 3 list the corresponding Etch, Circuit Schematic,
        Module Revision and Part Revisions.




                                CHART 1
------------------------------------------------------------------------------|
11/750 REV             |   50   |  60    |   70   |   70    |   80    |       |
==============================================================================|
KA750                  |        |        |        |  A      |   A     |       |
----------------------------------------------------------------------|-------|
MODULE  | SLOT |  ETCH |        |        |        |         |         |       |
----------------------------------------------------------------------|-------|
L0002   |  2   |   C   |CS=C,C1 |CS=C,C1 |CS=C,C1 |CS=C,C1  |         |       |
        |      |       |MR=C,D  |MR=C,D  |MR=C,D  |MR=C,D   |MR=C,D   |       |
        |      |   D   |CS=D,E  |CS=D,E  |CS=D,E  | CS=D,E  | CS=D,E  |       |
        |      |       |MR=D,E  |MR=D,E  |MR=D,E  |MR=D,E-E2|MR=D,E-E2|       |
------------------------------------------------------------------------------|
L0003   |  3   |   C   |PR=H1   |PR=J1,K1|PR=J1,K1 |PR=J1,K1|         |       |
        |      |       |MR=F    |        |         |        |         |       |
        |      |   D   |CS=F    |PR=H2   |PR=J2,K2,|PR=J2,K2|PR=J2,K2 |       |
        |      |       |MR=F    |        |   K3    |   K3   |   K3    |       |
----------------------------------------------------------------------|-------|
L0003-YA|  3   |       |        |        |         |PR=C1   |PR=C1    |       |
----------------------------------------------------------------------|-------|
L0004   |  4   |   D   |CS=J1  |PR=L1    |PR=M1,N1 |PR=P1   |PR=P1    |       |
        |      |       |MR=K   |         |         |        |         |       |
        |      |   E   |CS=K   |PR=L2    |PR=M2,N2 |PR=P2   |PR=P2    |       |
        |      |       |MR=K   |         |         |        |         |       |
----------------------------------------------------------------------|-------|
L0005   |  5   |   D   |N/A    |N/A      |  N/A    |  N/A   |  N/A    |       |
        |      |       |N/A    |N/A      |  N/A    |        |         |       |
----------------------------------------------------------------------|-------|
L0008-YA|  5   |   B   |PR=A1-B2|PR=A1-B2|PR=A1-B2 |PR=A1-B2|PR=A1-B2 |       |
----------------------------------------------------------------------|-------|         |
L0008-YB|  5   |   B   |PR=C2  |PR=D2    |  PR=D2  | PR=D2  |PR=D2    |       |
----------------------------------------------------------------------|-------|
M9313   |28 A-B|   B   |CS=A   |CS=A     |  CS=A   | CS=A   |CS=A     |       |
        |      |       |MR=A,B |MR=A,B   |MR=A,B   |MR=A,B  |MR=A,B   |       |
----------------------------------------------------------------------|-------|
TU58-XA |      |       |F-K    | F-K     |  F-K    | F-K    | F-K     |       |
----------------------------------------------------------------------|-------|
TU58-XB |      |   E   | F1-F4 | F1-F4   | F1-F4   |F1-F4   |F1-F4    |       |
(54-13489)|    |   F   | H-L1  | H-L1    | H-L1    |H-L1    |H-LI     |       |
----------------------------------------------------------------------|-------|
CONTROL |      |   C   | CS=C  | CS=C    |  CS=C   |CS=C    | CS=C    |       |
PANEL   |      |       |MR=C,D |MR=C,D   |  MR=C,D |MR=C,D  | MR=C,D  |       |
(54-13795)|    |       |        |        |         |        |         |       |
----------------------------------------------------------------------|-------|
BACKPNL |      |       | WL=B  | WL=B    |  WL=B   | WL=B   |WL=B     |       |
(70-16486)|    |       |       |         |         |        |         |       |
----------------------------------------------------------------------------- |
MS750-AA       |       |  A1   | A1      |  A1     |  A1    |A1       |       |
==============================================================================|
L0011   |  10  |   C   | CS=D  |  CS=D   | CS=D    |  CS=D  |PR=E1    |       |
------------------------------------------------------------------------------|
M8728   | 11-18|   C   | CS=C  | CS=C    |  CS=C   |  CS=C  |CS=C     |       |
----------------------------------------------------------------------+-------|

        Key:  E = Etch Rev; CS = Circuit Schematic Rev; MR = Module Rev;
        ---   PR= Part Rev; WL = Wirelist Rev





                               CHART 2
------------------------------------------------------------------------------|
11/750 REV             |   58   |  68    |   78    |   78    |  88     |
==============================================================================|
KA750                  |        |        |         |  A      |  A      |
------------------------------------------------------------------------------|
MODULE  | SLOT |  ETCH |        |        |         |         |         |
------------------------------------------------------------------------------|
L0002   |  2   |   C   |CS=C,C1 |CS=C,C1 |CS=C,C1  |CS=C, C1 |         |      |
        |      |       |MR=C,D  |MR=C,D  |MR=C,D   |MR=C,D   |MR=C,D   |      |
        |      |   D   |CS=D,E  |CS=D,E  |CS=D,E   | CS=D,E  |CS=D,E   |      |
        |      |       |MR=D,E  |MR=D,E  |MR=D,E   |MR=D,E-E2|MR=D,E=E2|      |
------------------------------------------------------------------------------|
L0003   |  3   |   C   |PR=H1   |PR=J1,K1|PR=J1,K1 |PR=J,K1  |         |      |
        |      |       |MR=F    |        |         |         |         |      |
        |      |   D   |CS=F    |PR=H2   |PR=J2,K2,|PR=J2,K2 |PR=J2,K2 |      |
        |      |       |MR=F    |        |   K3    |   K3    |   K3    |      |
------------------------------------------------------------------------------|
L0003-YA|  3   |       |        |        |         |PR=C1    |PR=C1    |      |
------------------------------------------------------------------------------|
L0004   |  4   |   D   |CS=J1   |PR=L1   |PR=M1,N1 |PR=P1    |PR=P1    |      |
        |      |       |MR=K    |        |         |         |         |      |
        |      |   E   |CS=K    |PR=L2   |PR=M2,N2 |PR=P2    |PR=P2    |      |
        |      |       |MR=K    |        |         |         |         |      |
------------------------------------------------------------------------------|
L0005   |  5   |   D   |N/A     |N/A     |  N/A    |  N/A    |N/A      |      |
        |      |       |N/A     |N/A     |  N/A    |         |         |      |
-------------------------------------------------------------|----------------|
L0008-YA|  5   |   B   |PR=A1-B2|PR=A1-B2|PR=A1-B2 |PR=A1-B2 |PR=A1-B2 |      |
------------------------------------------------------------------------------|
L0008-YB|  5   |   B   |PR=C2   |PR=D2   |  PR=D2  | PR=D2   |PR=D2    |      |
------------------------------------------------------------------------------|
M9313   |28 A-B|   B   |CS=A    |CS=A    |  CS=A   | CS=A    |CS=A     |      |
        |      |       |MR=A,B  |        |         |         |         |      |
------------------------------------------------------------------------------|
TU58-XA |      |       |F-K     | F-K    |  F-K    | F-K     |         |      |
------------------------------------------------------------------------------|
TU58-XB |      |   E   | F1-F4  | F1-F4  | F1-F4   |F1-F4    |F1-F4    |      |
(54-13489)|    |   F   | H-L1   | H-L1   | H-L1    |H-L1     |         |      |
------------------------------------------------------------------------------|
CONTROL |      |   C   | CS=C   | CS=C   |  CS=C   |CS=C     |CS=C     |      |
PANEL   |      |       |MR=C,D  |MR=C,D  |  MR=C,D |MR=C,D   |MR=C,D   |      |
(54-13795)|    |       |        |        |         |         |         |      |
------------------------------------------------------------------------------|
BACKPNL |      |       | WL=C   | WL=C   |  WL=C   | WL=C    |WL=C     |      |
(70-16486)|    |       |        |        |         |         |         |      |
------------------------------------------------------------------------------|
MS750-CA       |       |  A1    | A1     |  A1     |  A1     |         |      |
==============================================================================|
L0016  |  10   |    B  |CS= B,C | CS=B   | CS=B    | CS=B    |  PR=C1  |      |
------------------------------------------------------------------------------|
M8750          CS=A,B  | CS=A,B | CS=A,B |  CS=A,B | A,B     |  A,B    |      |
------------------------------------------------------------------------------|

        Key:  E = Etch Rev; CS = Circuit Schematic Rev; MR = Module Rev;
        ---   PR= Part Rev; WL = Wirelist Rev




                                CHART 3
-------------------------------------------------------------------------------
11/750 REV             |   5C   |  6C    |   7C   |   7C     |   8C    |      |
==============================================================================|
KA750                  |        |        |        |  A       |   A     |      |
-----------------------------------------------------------------------|------|
MODULE  | SLOT |  ETCH |        |        |        |          |         |      |
-----------------------------------------------------------------------|------|
L0002   |  2   |   C   |CS=C,C1 |CS=C,C1 |CS=C,C1  |CS=C,C1  |         |      |
        |      |       |MR=C,D  |MR=C,D  |MR=C,D   |MR=C,D   |MR=C,D   |      |
        |      |   D   |CS=D,E  |CS=D,E  |CS=D,E   | CS=D,E  |         |      |
        |      |       |MR=D,E  |MR=D,E  |MR=D,E   |MR=D,E-E2|         |      |
-----------------------------------------------------------------------|------|
L0003   |  3   |   C   |PR=H1   |PR=J1,K1|PR=J1,K1 |PR=J1,K1 |         |      |
        |      |       |MR=F    |        |         |         |         |      |
        |      |   D   |CS=F    |PR=H2   |PR=J2,K2,|PR=J2,K2 |         |      |
        |      |       |MR=F    |        |   K3    |   K3    |         |      |
-----------------------------------------------------------------------|------|
L0003-YA|  3   |       |        |        |         |PR=C1    |  PR=C1  |      |
-----------------------------------------------------------------------|------|
L0004   |  4   |   D   |CS=J1   |PR=L1   |PR=M1,N1 |PR=P1    |PR=P1    |      |
        |      |       |MR=K    |        |         |         |         |      |
        |      |   E   |CS=K    |PR=L2   |PR=M2,N2 |PR=P2    |         |      |
        |      |       |MR=K    |        |         |         |         |      |
-----------------------------------------------------------------------|------|
L0005   |  5   |   D   |N/A     |N/A     |  N/A    |  N/A    | N/A     |      |
        |      |       |N/A     |N/A     |  N/A    |         |         |      |
-----------------------------------------------------------------------|------|
L0008-YA|  5   |   B   |PR=A1-B2|PR=A1-B2|PR=A1-B2 |PR=A1-B2 |PR=A1-B2 |      |
-----------------------------------------------------------------------|------|
L0008-YB|  5   |   B   |PR=C2   |PR=D2   |  PR=D2  | PR=D2   |PR=D2    |      |
-----------------------------------------------------------------------|------|
M9313   |28 A-B|   B   |CS=A    |CS=A    |  CS=A   | CS=A    |         |      |
        |      |       |MR=A,B  |        |         |         |         |      |
-----------------------------------------------------------------------|------|
TU58-XA |      |       |F-K     | F-K    |  F-K    | F-K     |F-K      |      |
-----------------------------------------------------------------------|------|
TU58-XB |      |   E   | F1-F4  | F1-F4  | F1-F4   |F1-F4    |F1-F4    |      |
(54-13489)|    |   F   | H-L1   | H-L1   | H-L1    |H-L1     |H-L1     |      |
-----------------------------------------------------------------------|------|
CONTROL |      |   C   | CS=C   | CS=C   |  CS=C   |CS=C     |CS=C     |      |
PANEL   |      |       |MR=C,D  |MR=C,D  |  MR=C,D |MR=C,D   |MR=C,D   |      |
(54-13795)|    |       |        |        |         |         |         |      |
-----------------------------------------------------------------------|------|
BACKPNL |      |       | WL=D   | WL=D   |  WL=D   | WL=D    |WL=D     |      |
(70-16486)|    |       |        |        |         |         |         |      |
-----------------------------------------------------------------------|------|
MS750-HB       |       |  A1    | A1     |  A1     |  A1     | A1      |      |
=======================================================================|======|
L0022   |  10  |       |        |        |         |         |  B2     |      |
-----------------------------------------------------------------------|------|
M7199          |       |        |        |         |         |         |      |
------------------------------------------------------------------------------|

        Key:  E = Etch Rev; CS = Circuit Schematic Rev; MR = Module Rev;
        ---   PR= Part Rev; WL = Wirelist Rev





5.2     11/750-50 KERNEL REVISION SUMMARY
        ---------------------------------

        NOTE THAT REV 50/58 WAS CANCELLED IN Q4FY84, EXCEPT FOR REPLACEMENT
        OF THE L0005 CCS MODULE WITH THE L0008-YA OR -YB PCS MODULE.

        EQ KIT NUMBERS FOR THE L0008 MODULES REMAIN THE SAME.  SYSTEMS THAT
        DO NOT CONTAIN AN L0008 SHOULD BE UPGRADED CONCURRENT WITH REV 70/78.
        (SEE SECTION 5.8)

        Following Rev 50/58 revision summaries are for historical info.

        o   Creation date is August 1983 - mfg. implementation of Rev 50.

        o   Note that the difference between 50 and 58 is the backplane rev
            and the memory - 50 contains the Rev "B" backplane and 16K memory
            (L0011 controller and M8728 arrays); 58 machines contain the Rev
            "C" backplane and 64K memory (L0016 controller and M8750 (or M8728
            arrays).

            This will result in some differences, but most information for
            for Rev 5 applies to both 50 and 58 machines.  The differences
            will be noted.


        o   This FCO consists of the following ECOs:

                L0003-TW003 - See Section 5.8
                L0003-TW004 - See Section 5.8

                L0004-TW006 - On unaligned data transfers using the
                              buffered data path, and Unibus address bits
                              0 and 1 are asserted the UBI microsequencer
                              will branch to DATOB execution flows on a
                              DATI.

                            - Writes to the Unibus map that clear the valid
                              bit when the UBI is asserting SSYN can cause
                              SSYN to deassert before MSYN deasserts.

                            - the contents of the Time of Year Offset Register
                              are modified upon assertion of UBUS DCLO L.

                            - The UBI can assert DBBZ in response to a CPU
                              Unibus reference after entering purge microcode
                              flows causing the system to hang.

                L0016-SH002 - The refresh logic does not always work correctly
                              on power up with six or more M8750 arrays.

                11750-TW005/
                11751-TW004 - Replace L0005 (Common Control Store) with L0008
                              (Patchable Control Store)




        o   Manufacturing implementation for a COMPLETE Rev 5 11/750/11/751
            system was July 1984.

            Field implementation for Rev 5 began in September 1983.

        o   FCO DW750-R-0001 and FCO KC750-R-0001 should be implemented, if
            required, at the same time as Rev 5.  (See Sections 6.4 and 6.6
            of this document for more details on these FCOs.)

        o   The L0008 (PCS) module requires PCS microcode that is on TU58
            Tape #3, P/N BE-T538A-DE.  This tape will be included in the L0008
            E.Q. kits and must be used to load the PCS microcode in order to
            run the new microcode - Rev 96 or 97.  If the L0008 is installed
            without this tape, the machine will work but will run Rev 94
            microcode.

            Instructions on installing PCS are included in the FCO
            documentation and will be included with new systems shipped from
            manufacturing that contain the L0008 module.

        o   Compatible revision levels

                .   Microcode - CMT096 and CMT097 - replaces CMT094

                .   VAX/VMS   - Compatible with 2.X, 3.X

                    **Note**  11/750 systems running Version 2.X that have a
                              battery backup option are known to have problems
                              with warm restart once Rev 5 (i.e. the L0008
                              module) is installed.  Plan is to fix this in a
                              future release of PCS microcode.

                              Until then, it is recommended that these systems
                              not be upgraded with the FCO.

                .   Diagnostics

                    Minimum EVNDX for Rev 50/58 is 12 (May 1983). Minimum
                    diagnostic revision levels for Rev 5 are:




                Diagnostic      Min. Version    Title
                ~~~~~~~~~~      ~~~~~~~~~~~~    ~~~~~
                ECCBA               1.3         VAX 11750 UBI/DW750 DIAG
                ECKAL               3.2 *       VAX 11750 CACHE/TB DIAG
                ECKAX               5.0 *       VAX 11/750 CLUSTER EXER
                ECSAA               6.10B *     VAX 11/750 DIAG SUPERVISOR
                EVKAB               2.8         VAX ARCHITECTURAL INSTR
                EVKAC               4.3 *       VAX FLOATING POINT INST
                EVKAD               1.4         VAX COMPATIBILITY MODE INST
                EVKAE               1.7         VAX PRIVILEGED ARCHT INSTR

        o   Product Dependencies

                CI750 requires Rev 5.

        o   Quick Check

                Examine SID register in console mode

                Rev 50

                >>> E/I 3E
                    ------
                      I   0000003E   02005F50   (5F on power up - Rev 95
                      I   0000003E   02006050   (60 with Rev 96 ucode loaded)
                      I   0000003E   02006150   (61 with Rev 97 ucode loaded)

                L0003 - E103 is DC651
                L0004 - E135 is 23-991A9
                L0016 - Wire from E7-15 to E8-11
                Presence of L0008 in Slot 5

        o   SID Switch Setting

                                           REG BIT POSITION
                7  6  5  4  3  2  1  0  <--ETCHED ON BOARD
            0 +------------------------+
            F | 1  2  3  4  5  6  7  8 |<--SWITCH NUMBER STAMPED
            F |------------------------|   ON SWITCH PACK
              ||O||O||O||O||O||O||O||O||
              ||N||F||N||F||N||N||N||N||
              || ||F|| ||F|| || || || ||
              +------------------------+   (OFF = 1)


5.3     11/750-58 KERNEL REVISION SUMMARY
        ---------------------------------

        NOTE THAT REV 50/58 WAS CANCELLED IN Q4FY84, EXCEPT FOR REPLACEMENT
        OF THE L0005 CCS MODULE WITH THE L0008-YA OR -YB PCS MODULE.

        EQ KIT NUMBERS FOR THE L0008 MODULES REMAIN THE SAME.  SYSTEMS THAT
        DO NOT CONTAIN AN L0008 SHOULD BE UPGRADED CONCURRENT WITH REV 70/78.
        (SEE SECTION 5.8)





        o  Section 5.5 applies (through the Compatible Revision Levels)
           to 11/750-58 as well.

        o   Compatible revision levels

                .   Microcode - CMT096 replaces CMT094

                .   VAX/VMS   - Compatible with 3.X

                .   Diagnostics - Same as Section 5.9

        o   Quick Check

                Examine SID register in console mode

                >>> E/I 3E
                    ------

                      I   0000003E   02005F58   (5F on power up - Rev 95)
                      I   0000003E   02006058   (60 with Rev 96 ucode loaded)
                      I   0000003E   02006158   (61 with Rev 97 ucode loaded)

                L0003 - E103 is DC651
                L0004 - E135 is 23-991A9
                L0016 - Wire from E7-15 to E8-11
                Presence of L0008 in Slot 5

        o   SID Switch Setting - Rev 58

                                           REG BIT POSITION
                7  6  5  4  3  2  1  0  <--ETCHED ON BOARD
            0 +------------------------+
            F | 1  2  3  4  5  6  7  8 |<--SWITCH NUMBER STAMPED
            F |------------------------|   ON SWITCH PACK
              ||O||O||O||O||O||O||O||O||
              ||N||F||N||F||F||N||N||N||
              || ||F|| ||F||F|| || || ||
              +------------------------+   (OFF = 1)

5.4     11/750-60 KERNEL REVISION SUMMARY
        ---------------------------------


        o   REV 60/68 HAS BEEN CANCELLED.  NO FCO WILL BE IMPLEMENTED.
            ALL L0003 REV H1/H2 MODULES WILL BE REPLACED WITH REV J1/J2
            MODULES AS PART OF Rev 70/78; ALL L0004 REV L1/L2 WILL BE REPLACED
            WITH REV M1/M2 AS PART OF REV 70/78.

            A problem was discovered with the L0003 cache parity fix
            (Rev H1/H2).  DO NOT USE L0003 REV H1/H2, AS POSSIBLE
            CORRUPTION OF CUSTOMER'S DATA CAN OCCUR.  This is known to be
            a problem with CI750s and DR750s, but can potentially be a
            problem in an 11/750 or 11/751 without these options.

        o   The major difference between Revision 60 and 68 is the backplane
            revisions - 60 = Rev B; 68 = Rev C.  Most information applies to
            both 60 and 68 and will be outlined in this section.  Differences
            for Rev 68 will be noted.




        o   Manufacturing implementation for Rev 6 was March 5, 1984 -
            from Burlington and Galway (approximately 50% will be POM and ship
            directly to customers; the other 50% will ship to FA&T facilities);
            FA&T plants (Westminster, Kanata, Ayr) will begin shipping Rev 6 in
            April.

            (Note that manufacturing only ships Rev 68)

        o   Field implementation of this FCO is expected to begin in Q4FY84..

        o    Depending on the revision status of the machine, there may be
             more ECOs to install than those listed below.  The FCO document
             for Rev 6 contains instructions to upgrade machines from Rev 3,
             4 and 5 to Rev 6.

        o   This REV 6 FCO consists of the following ECOs:

                L0003-TW005  - Fixes phantom TB parity errors
                             - Allows recovery for cache parity errors
                             - Allows recover for soft TB parity errors

                        New Part Revision marked on the module handle will
                        be: Etch C - "H1"; Etch D - "H2"

                          CMT098 microcode required along with L0003
                           hardware

                L0004-TW007  - Corrects lost device interrupt problem
                             - Permits use of all vendor parts on QVL
                             - Controls crystal voltage when toy battery
                               isn't installed

                        New Part Revision marked on the module handle will
                        be: Etch D - "L1"; Etch E - "L2"


        o    Compatible Revision Levels

                .   Microcode - CMT098 (PN BE-T538C-ME) - Released from SDC
                                March 5, 1984.

                          Rev 98 microcode will be included with 11/750 and
                          11/751 CPUs shipped from Burlington through March,
                          to insure that the current microcode is available
                          at installation.  Software boxes shipped from SDC
                          may contain the old rev microcode; Rev 98 part number
                          is BE-T538C-ME.  ONLY REV 98 SHOULD BE USED!!!

                .   VAX/VMS - Warm restart problems in systems running 2.X of
                          VMS still exists - there are no plans to fix this
                          problem in the near future.

                .   Diagnostics

                    Minimum EVNDX for Rev 60/68 was 15 (March 1984). Minimum
                    diagnostic revision levels for Rev 6 are:




                Diagnostic      Min. Version    Title
                ~~~~~~~~~~      ~~~~~~~~~~~~    ~~~~~
                ECCBA               1.3         VAX 11750 UBI/DW750 DIAG
                ECKAL               3.3         VAX 11750 CACHE/TB DIAG
                ECKAX               5.1 *       VAX 11/750 CLUSTER EXER
                ECSAA               6.13 *      VAX 11/750 DIAG SUPERVISOR
                EVKAB               3.0 *       VAX ARCHITECTURAL INSTR
                EVKAC               5.0 *       VAX FLOATING POINT INST
                EVKAD               2.0 *       VAX COMPATIBILITY MODE INST
                EVKAE               2.0 *       VAX PRIVILEGED ARCHT INSTR


        o   Quick Check

                Examine SID register in console mode

                Rev 60

                >>> E/I 3E
                    ------

                      I   0000003E   02005F60   (5F on power up - Rev 95)
                      I   0000003E   02006260   (62 with Rev 98 ucode loaded)

                        L0003 - E4 is a 74S00
                        L0004 - Jumper between E46 Pin 1 and 2


        o   SID Switch Setting
                                           REG BIT POSITION
                7  6  5  4  3  2  1  0  <--ETCHED ON BOARD
            0 +------------------------+
            F | 1  2  3  4  5  6  7  8 |<--SWITCH NUMBER STAMPED
            F |------------------------|   ON SWITCH PACK
              ||O||O||O||O||O||O||O||O||
              ||N||F||F||N||N||N||N||N||
              || ||F||F|| || || || || ||
              +------------------------+   (OFF = 1)

5.5     11/750-68 KERNEL REVISION SUMMARY
        ---------------------------------

        o   Rev 60/68 HAS BEEN CANCELLED.  NO FCO WILL BE IMPLEMENTED.
            ALL L0003 REV H1/H2 MODULES WERE REPLACED WITH J1/J2
            MODULES AS PART OF REV 70/78; ALL L0004 REV L1/L2 MODULES
            WERE REPLACED WITH REV M1/M2 MODULES AS PART OF REV 70/78.

            A problem was discovered with the L0003 cache parity fix
            (Rev H1/H2).  DO NOT USE L0003 REV H1/H2, AS POSSIBLE
            CORRUPTION OF CUSTOMER'S DATA CAN OCCUR.  This is known to be
            a problem with CI750s and DR750s, but can potentially be a
            problem in an 11/750 or 11/751 without these options.





        o   Quick Check

                Examine SID register in console mode

                Rev 68

                >>> E/I 3E
                    ------

                      I   0000003E   02005F68   (5F on power up - Rev 95)
                      I   0000003E   02006268   (62 with Rev 98 ucode loaded)

                        L0003 - E4 is a 74S00
                        L0004 - Jumper between E46 Pin 1 and 2

         o  SID Switch Setting

                                           REG BIT POSITION
                7  6  5  4  3  2  1  0  <--ETCHED ON BOARD
            0 +------------------------+
            F | 1  2  3  4  5  6  7  8 |<--SWITCH NUMBER STAMPED
            F |------------------------|   ON SWITCH PACK
              ||O||O||O||O||O||O||O||O||
              ||N||F||F||N||F||N||N||N||
              || ||F||F|| ||F|| || || ||
              +------------------------+   (OFF = 1)


5.6      11/750-70 KERNEL REVISION SUMMARIES
         -----------------------------------

        o   Note that the difference between Revs 70, 78 and 7C is the
            backplane rev and the memory - 70 contains the Rev "B" backplane
            and 16K memory (L0011 controller and M8728 arrays); 78 machines
            contain the Rev "C" backplane and 64K memory (L0016 controller
            and M8750 (or M8728 arrays); 7C contains the Rev "D" backplane
            and 4MB memory (L0022 controller and M7199) or M8750 arrays.

            This will result in some differences, but most information for
            Rev 7 applies to 70, 78 and 7C machines.  The differences
            will be noted.

            Creation date is May 1984 - manufacturing implementation
            date.

        o   FCO implementation July 1984.  EQ numbers for Rev 7 are the
            same as Rev 6: L0003 - EQ-01201-05; L0004 - EQ-01201-04; if
            required, L0008-YA - EQ-01201-01 or L0008-YB EQ-01201-02.

        o   Rev 7 incorporated all fixes from Rev 5 and Rev 6 EXCEPT
            for the cache parity fix (See above section).  This fix
            has been disabled on Rev J1/J2 L0003s.

        NOTE:      L0003 and L0004 revisions should be checked prior to ordering
                   Rev 7 material.  Manufacturing is known to have shipped Rev
                   7 L0003s and L0004s while still setting the SID switch at 68.




        o  Rev 7 ECOs:

           ECO #        Part Rev     Problem/Correction         Quick Check
           -----        --------     -------------------        -----------
           L0003-TW006  J1/J2        1. Disables cache parity   E109 pins 4,5
                                        fix in L0003-TW005      6 are grounded
                                     2. Corrects glitch on
                                        stall L signal

           L0003-TW007  K1/K2        1. Remove leftover wires   No wire from
                        (field/         from L0003-TW006        E86-5 to E1-11
                        repair centers)

                        K3           1. Remove leftover wires   E17 is spare
                        (module         from L0003-TW006 and    location
                         build)         unused component

           L0004-TW008  M1/M2        1. Corrects arbitration    E11 is 23-656A2
                                        problem on the CMI
                                        during interrupts
                                        (UBI/UDA "Hang" problem)

           L0004-TW009  N1/N2        1. Replace MAP rams with   E60-62, E70-72,
                                        NMOS rams               E81, E82, E92,
                                                                E102 are 9122s


        These ECOs are NOT part of the Rev 7 FCO, but were phased into mfg. and
        repair centers at a later date.

        o  Rev 7 ECOs are REQUIRED for CI750 and DR750.

        o  Related FCOs:

                DW750-R-0002 and UDA50-R-0005 should be installed
                with Rev 7 (See section 6.4 in this document for
                details).

                FP750-R-0002 should also be installed with Rev 7.
                (See Section 6.2)

        o  Compatible Revision Levels

                Microcode - Rev 98 or greater

  NOTE:  Rev 99 began shipping from SDC in Diagnostic Release 22 - 12/30/85.

                This latest rev fixes bugs with CALLS, BBSSI/BBCCI HW Int.
                lock EDITPC 'Double Match' R0 corruption, Invalid SCBB "Ucode
                Hang' and MTPR "CC mismatch source' errors.

                VAX/VMS - Version 3.X or greater

                EVNDX - Minimum EVNDX release is 15 (March 1984).




        o  Quick check

                Rev 70:

                I   0000003E    02005F70 (5F on power up - ucode Rev 95)
                I   0000003E    02006270 (62 with Rev 98 ucode loaded)


        o  SID Switch Setting

                Rev 70:

                SYS ID  <7>   <6>   <5>   <4>   <3>   <2>   <1>   <0>
                SWITCH  S1    S2    S3    S4    S5    S6    S7    S8
                        ON    OFF   OFF   OFF   ON    ON    ON    ON

5.7      11/750-78 KERNEL REVISION SUMMARIES
         -----------------------------------

        o   Section 5.8 applies (through the Compatible Revison Levels)
            to 11/750-70, 11/750-78 and 11/750-7C as well.

        o   Quick check

                Rev 78:

                I   0000003E    02005F78 (5F on power up - ucode Rev 95)
                I   0000003E    02006278 (62 with Rev 98 ucode loaded)

        o   SID Switch Setting

                Rev 78:


                SYS ID  <7>   <6>   <5>   <4>   <3>   <2>   <1>   <0>
                SWITCH  S1    S2    S3    S4    S5    S6    S7    S8
                        ON    OFF   OFF   OFF   OFF   ON    ON    ON

5.8    11/750-7C KERNEL REVISION SUMMARY
       ---------------------------------

  NOTE:  Only the Rev "C" backplane may be reworked to a rev "D" to
          accomodate the new (4MB) memory upgrade.

    o   A Revision 7C will be created by Field Service upon installation
        of the MS750-HB option.  This system revision (7C) will never
        ship from manufacturing.




    o   Quick Check

                Rev 7C:

                I   0000003E    02005F7C (5F on power up - ucode Rev 95)
                I   0000003E    0200627C (62 with Rev 98 ucode loaded)


                SYS ID  <7>   <6>   <5>   <4>   <3>   <2>   <1>   <0>
                SWITCH  S1    S2    S3    S4    S5    S6    S7    S8
                        ON    OFF   OFF   OFF   OFF   OFF    ON    ON

  5.9  11/750-80 KERNEL REVISION SUMMARY
       ---------------------------------

    o   The difference between 80, 88 and 8C are the same as described in
        section 5.8 for 70, 78 and 7C machines, i.e. the backplane revs
        and memory modules.

    o   Rev 8 ECOs:

        ECO #           Part Rev
        -----           --------

        L0011-005       E1
        L0016-003       C1
        L0022-001       B2

        PROBLEMS FIXED BY ABOVE ECOS:
        ----------------------------

        1 - Patchable control store is not loaded at boot time.
        2 - UDA50 boot ROM CODE does not allow enough time for RA60 to spin up
             after power fail.
        3 - ROM code for TU58 does not allow enough time for TU58 to initialize.
        4 - Massbus boot ROM code has wrong hex code for RP07 drive.

        FCO 11750-I008 currently being implemented.

                EQ-01453-01 - Boot ROMS
                EQ-01453-02 - REV 99 ucode
                FA-04739-01 - FCO document

        o  Quick check

                Rev 80:

                L0011 - E81 is 23-E41A9-00
                L0016 - E44 is 23-E41A9-00
                L0022 - E48 is 23-E41A9-00

                SYS ID  <7>   <6>   <5>   <4>   <3>   <2>   <1>   <0>
                SWITCH  S1    S2    S3    S4    S5    S6    S7    S8
                        OFF   ON    ON    ON    ON    ON    ON    ON





        o  Quick check

                Rev 88:

                L0011 - E81 is 23-E41A9-00
                L0016 - E44 is 23-E41A9-00
                L0022 - E48 is 23-E41A9-00

                SYS ID  <7>   <6>   <5>   <4>   <3>   <2>   <1>   <0>
                SWITCH  S1    S2    S3    S4    S5    S6    S7    S8
                        OFF   ON    ON    ON    OFF   ON    ON    ON

    o   Quick Check

                Rev 8C:

                L0011 - E81 is 23-E41A9-00
                L0016 - E44 is 23-E41A9-00
                L0022 - E48 is 23-E41A9-00

                SYS ID  <7>   <6>   <5>   <4>   <3>   <2>   <1>   <0>
                SWITCH  S1    S2    S3    S4    S5    S6    S7    S8
                        OFF   ON    ON    ON    OFF   OFF   ON    ON

  5.10 11/750-90 KERNEL REVISION SUMMARY
       ---------------------------------

    o   The difference between 90, 98 and 9C are similar to that described in
        section 5.8 for 7X and 8X machines, i.e. the backplane revs and
        memory modules.

        PROBLEMS FIXED WITH REVISION 9:

        1 - REMQUE Instruction.
        2 - CMT 103 required for support of VMS V5.

        FCO: 11750-I009 involved installing latest rev console microcode,
        Rev 103. No EQ kits were made available. Latest microcode was
        shipped from SDC in October, 1988.

        Rev 90:

                SYS ID  <7>   <6>   <5>   <4>   <3>   <2>   <1>   <0>
                SWITCH  S1    S2    S3    S4    S5    S6    S7    S8
                        OFF   ON    ON    OFF   ON    ON    ON    ON

        Rev 98:

                SYS ID  <7>   <6>   <5>   <4>   <3>   <2>   <1>   <0>
                SWITCH  S1    S2    S3    S4    S5    S6    S7    S8
                        OFF   ON    ON    OFF   FF    ON    ON    ON

        Rev 9C:

                SYS ID  <7>   <6>   <5>   <4>   <3>   <2>   <1>   <0>
                SWITCH  S1    S2    S3    S4    S5    S6    S7    S8
                        OFF   ON    ON    OFF    OFF  OFF   ON    ON





6.0     OPTION REVISION HISTORY
        -----------------------

        The option interfaces and adaptors will have a separate revision
        history from the kernel.  A revision change to these options will
        not affect the kernel revision.
        ----------------------------------------------------------------
        OPTION  RH750           L0007           MBA Module
                --------------------------------------------------------
                KU750 (WCS)     L0008-YB        Replaces existing KU750-YG
                --------------------------------------------------------
                FP750           L0001           FPA Module
                --------------------------------------------------------
                DW750           L0010           2nd Unibus Module
                --------------------------------------------------------
                DR750           L0014           Interprocessor I/F Module
                --------------------------------------------------------
                KC750           L0006           Remote Diagnosis Option
        ----------------------------------------------------------------

        Each option revision summary will indicate any hardware, operating
        system, diagnostic and microcode constraints.  The option will be
        considered compatible with the kernel hardware, VMS and microcode
        revisions used during the development of the option.  Earlier
        compatible revisions will be noted only if they have been tested
        and proven to work.  Compatible module revisions are separated by
        commas.

        Pertinent diagnostics to be run for each option (and the required
        revision, if any) will also be noted.

6.1     RH750    OPTION REVISION DESCRIPTION
        ------------------------------------

        -----------------------------------------------------------------+
        RH750 Revision               |   00  |  01   |  02  |  03  |  04 |
        -----------------------------------------------------------------|
          MODULE   |   SLOT   | ETCH |       |       |      |      |     |
        -----------------------------------------------------------------|
          L0007    | 7,8 or 9 |   C  |  CS=A | CS=A1 |      |      |     |
                   |          |      |  MR=A | MR=B  |      |      |     |
                   |          |   D  |       | CS=B,C|      |      |     |
                   |          |      |       | MR=B,C|      |      |     |
        -----------------------------------------------------------------+

        RH750-00  REVISION SUMMARY
        --------------------------

        o   Creation date is FCS - April 1981.

        o   This represents the initial introduction of revision control
            for the RH750 and represents the minimum revision level for
            the L0007 module at FCS.

        o   Diagnostics - ECCAA and EVRAA.






        RH750-01  REVISION SUMMARY
        --------------------------

        o   Creation date is October, 1981.

        o   Represents RH750-R-0001 FCO, which consisted of ECO L0007-TW002
            to fix the problem of data lates on multiple MASSBUS systems.
            Replace 23-909A9 at location E12 with 23-969A9.

        o   FCO done on "C" etch modules only.  Etch Revision "D", Module
            Rev "B" is a relayout of the L0007 module and is equivalent to
            Etch Rev "C", Module Rev "A1".

        o   Diagnostics - ECCAA and EVRAA.

        o   Quick Check for Rev A1 - E12 is 23969A9-00.


6.2     FP750   OPTION REVISION DESCRIPTION
        -----------------------------------

        -----------------------------------------------------------+
        FP750 Revision           | 00  |  01  |  02  |  03  |  04  |
        -----------------------------------------------------------|
          MODULE   | SLOT | ETCH |     |      |      |      |      |
        -----------------------------------------------------------|
          L0001    |  1   |  D   | CS=B|CS=C  |PR=E2 |      |      |
                   |      |      | MR=B|MR=C,D|      |      |      |
                   |      |  E   |     |CS=D  |PR=E1 |      |      |
                   |      |      |     |MR=D  |      |      |      |
        -----------------------------------------------------------+

        FP750-00   REVISION SUMMARY
        ---------------------------

        o   Creation date is FCS - December 1981.  This represents the
            minimum module revision level required at FCS.

        o   11750 kernal rev must be at Rev 3 (Rev 94 microcode required).

        o   Diagnostics - ECKAB (min. rev. 7.2) - EVNDX 4.0 (Jan 1982)
                          ESCAA (min. rev. 6.4) -        "
                          EVKAB (min. rev. 2.5) -        "
                          EVKAC (min. rev. 4.0) -        "


        FP750-01   REVISION SUMMARY
        ---------------------------

        o   Creation date is March 1982.

        o   Represents FP750-R-0001 FCO consisting of ECO L0001-TW002, which
            fixes the problem of the FPA not powering up "enabled" due to
            incomplete initialization of circuitry.





        o   Diagnostics - ECKAB (min. rev. 7.2) - EVNDX 4.0 (Jan 1982)
                          ESCAA (min. rev. 6.4) -        "
                          EVKAB (min. rev. 2.5) -        "
                          EVKAC (min. rev. 4.0) -        "

        o   Quick check for MR C - Wire on E33-10.

        FP750-02   REVISION SUMMARY
        ---------------------------

        o   Creation date is March 1984 - Manufacturing implementation
            date for L0001-TW004.

        o   ECO fixes problem of the Q1 transistor on the L0001 module burning
            out, causing failure of the FP750.  New Part Revisions: Etch D =
            Part Rev E2; Etch E = Part Rev E1.

        o   FCO available in Q1FY85.  This should be implemented with
            Rev 7 if FP750 option present.  EQ kit number is EQ-01281-01.
            This is a module replacement FCO; the FCO program is being
            controlled due to limited material availability.

            Contact your regional/country FCO coordinator for ordering
            procedures.

        o   Quick check for Rev E1/E2: R33 is 75 OHM Resistor.

        o   EVNDX.15 (March 1984) minimum diagnostics for FP750.

                                -28-

6.3     KU750  OPTION REVISION DESCRIPTION
        ----------------------------------

        ---------------------------------------------------------------+
        KU750 Revision              |  00  |  01  |  02  |  03  |  04  |
        ---------------------------------------------------------------|
                   | SLOT    | ETCH |      |      |      |      |      |
        ---------------------------------------------------------------|
          5413865-C| attaches|  C   |CS=B  |      |      |      |      |
                   |to L0005 |      |MR=C  | N/A  | N/A  |      |      |
        ---------------------------------------------------------------|
          L0008-YB |   5     |  A   |      |PR=C2 | PR=C2|      |      |
        ---------------------------------------------------------------+
          G&H      |         |      |M198A |T909A |T909C |      |      |
        Microcode  |         |      |(2.0) |      |      |      |      |
        ---------------------------------------------------------------+

        KU750-00  REVISION SUMMARY
        --------------------------

        o   Creation date is FCS - March 82.

        o   This represents the minimum module revision level required
            at FCS.




        o   Requires KU780-YG microcode rev at 2.0 or higher (P/N BE-M198A-DE).
            This TU58 tape is shipped with the KU750-YG option.  The middle
            5 digits of this part number will be tracked in the above chart,
            as the letter on the right will be bumped when the microcode
            changes.

        o   Diagnostic - ECKAX - 11750 Cluster Exerciser - EVNDX 7.0 (July 82)
                                 (minimum rev 3.4)


        KU750-01 REVISION SUMMARY
        -------------------------

        o   Creation date was June, 1984.

        o   Quick check for C2 is: Wire from E188-12 to E192-09.

        o   New packaging for KU750 (WCS) option; the KU750-YG (5413865-C)
            replaced by the L0008-YB module.  Microcode was also changed -
            new part number is BE-T909A-ME.

        o   All existing KU750-YG customers under contract will be upgraded
            with an L0008-YB as part of FCO Rev 7.

        o   Existing KU750-YG customers will also be upgraded with new KU750
            microcode.  FCO will be available in Q3FY85.

        o   Current version of the microcode is compatible with VMS 3.X.  It
            is compatible with VMS V4 until the "VMSUPDATE" procedure can no
            longer be used (projected to be VMS 4.2)  At that time, use of
            "VMSINSTALL" will be required.

            KU750 microcode is being updated to support "VMSINSTALL" and
            will be available prior to the release of VMS 4.2.

        KU750-02 REVISION SUMMARY
        -------------------------

        o   Creation date was October, 1988.

        o   Revision C, BE-T909C-ME, is required when running VMX 5.0.

6.4     DW750  OPTION REVISION DESCRIPTION
        ----------------------------------
        ------------------------------------------------------------+

        DW750 Revision           |  00  |  01  |  02  |  03  |  04  |
        ------------------------------------------------------------|
          MODULE   | SLOT | ETCH |      |      |      |      |      |
        ------------------------------------------------------------|
          L0010    |  10  |  C   | CS=B |PR=C1 |PR=E1,|      |      |
                   |      |      | MR=B |      | E2,F1|      |      |
        ------------------------------------------------------------+





        DW750-00  REVISION SUMMARY
        --------------------------
        o   Creation date is FCS for the DW750 option - September 1982.

        o   11750 kernel must be at rev 3 or higher.

        o   Requires VMS Version 3.0 or higher.

        o   Diagnostics - ECSAA - min. rev 6.4 - EVNDX Release 4.0 (Jan 82)
                          ECCBA - min. rev 1.3-    "      "     "     "

        DW750-01 REVISION SUMMARY
        -------------------------
        o   Creation date is 5/31/83 - manufacturing ship date.

        o   Consists of the following ECO:

                L0010-TW002 - on DATI with offset and Unibus address bits
                              0 and 1 asserted, the microsequencer may branch
                              to the DATOB flow.

                            - offset transfers across page boundaries retain
                              old map values.

        o   FCO (DW750-R-0001) was implemented in the field beginning in
            September 1984, to be installed with FCO 11/750 Rev 5.

        NOTE:: FCO HAS BEEN CANCELLED AS OF 3/15/84.  ANOTHER FCO, DW750-R-0002
               WAS IMPLEMENTED AT A LATER DATE.  ANY EQ KITS THAT HAVE
               BEEN ORDERED FOR THIS FCO SHOULD BE CANCELLED (EQ-01189-00).

        o   Following diagnostics updated and available in Release 12:

                Diagnostic      Min Version     Title
                ----------      -----------     -----
                ECCBA           1.3             VAX 11/750 UBI/DW750 Diag
                ECSAA           6.10B           VAX 11/750 Diag Supervisor

        o   Quick check - E50 is 23-991A9-00





        DW750-02 REVISION SUMMARY
        -------------------------
        o  Creation date is July 1984.

        o  Rev 2 ECOs:

           ECO #        Part Rev    Problem/Correction       Quick Check
           -----        --------    ------------------       -----------

           L0010-TW004  D1          1. Corrects arbitration  E28 is
                                       problems on the CMI   23-656A2-00
                                       during interrupts.
                                       (UBI/UDA hang problem)

           L0010-TW005  E1          1. Corrects micro-       Jumper between
                                       sequencer branching   E56.11 and
                                       errors.               E24.5

*          L0010-TW006  E2          1. Replace 19-09704-00   E91 is 19-10389
                                       w/19-10389-00
                                       (no longer available)

*          L0010-TW007  F1          1. Replace MAP rams      E55,E68,E81,E82
                                       w/NMOS Rams           E92-E97

*   These ECOs are NOT part of FCO DW750-R-0002; they were phased into mfg.
    and the repair centers at a later date.


        o  L0010-TW004 and L0010-TW005 were implemented together in the field
           as part of FCO DW750-R-0002.  Mfg. shipped L0010s at "D1" until
           9/84 in the U.S.and GIA (7/84 in Europe). These will have to be
           upgraded to "E1" as part of the FCO.

           L0010 Rev "C" and above can be reworked in the field; Rev "B" or
           below L0010s must be replaced.

           EQ kits:     Module Replacement (L0010)    - EQ-01280-01
                        Rework (for Rev C or higher)  - EQ-01280-02

           EQ-01280-02 is a controlled FCO kit due to material shortages.
           Contact your regional/country FCO coordinator for ordering info.

        o  Diagnostics

           EVNDX.15 (May 1984)






6.5     DR750   OPTION REVISION DESCRIPTION
        -----------------------------------
        ------------------------------------------------------------+
        DR750 Revision           |  00  |  01  |  02  |  03  |  04  |
        ------------------------------------------------------------|
                   | SLOT | ETCH |      |      |      |      |      |
        ------------------------------------------------------------|
          L0014    |      |   A  | CS=A | PR=B1|      |      |      |
                   |      |      | MR=A |      |      |      |      |
        ------------------------------------------------------------|
         DR750     |      |      |T326A |T326A |      |      |      |
        Microcode  |      |      |      |      |      |      |      |
        ------------------------------------------------------------+

        DR750-00 REVISION SUMMARY
        -------------------------
        o   Creation date is FCS - September 1982.  This represents the
            minimum revision level required at FCS.

        o   11750 kernel rev must be 30/38 or higher.

        o   DR750 requires a CML gate array (PN 19-14725-00) at location
            E103 on the L0003 module.  CML is packaged with the DR750
            option and must be installed on the L0003 module during DR750
            installation. (See DR750 installation procedures.)

        o   Microcode rev will be tracked by the middle 5 digits of the part
            number for the TU58 tape (BE-M198A-DE).  The letter on the right
            will be bumped when the microcode is updated.

        o   Requires VMS Version 3.0.

        o   Diagnostics - EVDFD - rev 1.0 - EVNDX Release 7.0 (July 82)
                          EVDFE - Rev 1.0 -             "
                          EVDFF - rev 1.0 -             "
                          EVDFG - rev 1.0 -             "
                          ECDFA - rev 1.0 -             "
                          ECDFB - rev 1.0 -             "
                          ECSAA - min rev 6.7 -         "

        DR750-01 REVISION SUMMARY
        -------------------------

        o   Creation date is April 1984 - manufacturing implementation of
            ECO L0014-TW001.

        o   Either a CI750 or DR750 can be present in the machine - not both.

        o   11/750 CPU must be at Rev 70/78.

        o   ECO fixes problem of local memory parity errors on DR750.  DR750
            has been on hold pending this ECO, so volumes are low (less than
            10).  Any L0014s at Rev "A" should be replaced with Rev "B1".

        o   No diagnostic or microcode changes required for this ECO.




6.6     KC750  OPTION REVISION DESCRIPTION
        ----------------------------------

        -------------------------------------------------------------------+
        KC750 Revision          |  00   |   01  |   C    |        |        |
        -------------------------------------------------------------------|
          Module  | SLOT | ETCH |       |       |        |        |        |
        -------------------------------------------------------------------|
          L0006   |      |  A   | MR=*2 | MR=*3 |   --   |        |        |
                  |      |  B   | MR=B  | MR=B1 |  PR=C1 |        |        |
                  |      |  C   | MR=C  | MR=D  |  PR=E1 |        |        |
        -------------------------------------------------------------------+

        KC750-00  REVISION SUMMARY
        --------------------------

        o   Creation date is FCS - 10/80.  This represents the minimum
            revision level required at FCS.

        KC750-01  REVISION SUMMARY
        --------------------------

        o   This represents L0006-TW004.  Manufacturing began shipping on
            22 February 1982.

        o   The ECO fixes a problem with the KC750 firmware which makes
            it possible to remotely load data into 11/750 memory, corrupting
            the customer's running system, even while the keyswitch is in
            remote/secure position.  FCO KC750-R-0001 will be done in
            conjunction with Rev 5, projected to be September 1984.

        o   FCO will be module rework for Etch B and C. Etch A is multiwire;
            field rework should not be attempted on these modules.

        o   Quick Check -

                Wires on E6-3,4; E12-12,13; E42-13; E133-12,13,14,15;
                E176-24; and E187-5.

                Etch cuts on side 2 near E42-13 and E187-5.

        o   Diagnostics - ECKAF - Version 3.1 (Diagnostic Release 9).




        KC750-C REVISION SUMMARY
        --------------------------
        o   This represents ECO L0006-MR005.

        o   Quick Check - Wire from E106.14 to E85.2.

        o   The ECO fixes a problem with the RDM (Remote Diagnostic Module).
            L0006 module intermittently fails to drive WBUS properly causing
            false micro-diagnostic errors.

        NOTE:  Etch A is no longer supported.  These will be scrapped as
                they are returned from the field.

               New rev of L0006 modules are as follows:

                Etch B          Part Rev B1
                Etch C          Part Rev C1



  6.7   CI750   OPTION REVISION DESCRIPTION
        -----------------------------------

        ------------------------------------------------------------------------
        CI750       |    B    |   C    | D,(**DD1)|  E     |   F    |   H
        -------------------------------------------------------------|--------
        L0100***    |    D    |   D    |  D       | D1      |  E2|   |
        L0118***    |    -    |  -     |   -      |  -      | -      |   B
        L0101       |    H    |   H    |  H, **HH1| J,K     |  K     |
        L0009       |    A    |   A    |  A       |  A      |  A     |   B
        L0400       |    B    |   B    |  B       |  B      |  B     |   B
        Microcode   |         |        |          |         |        |
         CI780.BIN  | Rev 2.0 | Rev 3.0|  Rev 4.0 | Rev 5   | Rev 7  | Rev 8
         BE-T204*-ME|   E-F   |   G    |  H       |  I      |  L     |   O
                    |         |        |          |**Rev 6  |        |
        Backplane   |    B    |   B    |  B       |  B      |  B     | B
        -----------------------------------------------------------------------
        POWER SUPPLY   A        A         A         A         A        A

          * (NOTE) "B2" is being marked on "B" etch and is equal to "D1".
         ** (NOTE) Rev 6.0 ucode and the "HH1" module are only used if you
                   need to install FCO CI750-DD1-I-004 making the CI750
                   Rev DD1.
        *** (NOTE) L0118 is enhanced L0100 replacement and can be used as
                   "universal spare".  L0118 is required to support >16
                   node functionality.

        Rev "F" incorporates the CI750-I006 FCO which upgrades the L0009
        and fixes the following:  another VAXcluster node randomly receives
        incorrect data in data-packet originating from VAX750/CI750;, when a
        VAX750 "single-bit or double-bit" main-memory (MS750-XX) error is
        encountered by the CI750.

    **  NOTE:  VMS V5 requires the CI750 to be at a minimum revision of
                "F1"





        CI750-00 REVISION SUMMARY
        -------------------------
        o   Creation date is May 1984 - FCS.  The above chart for Rev 00
            represents the minimum revision levels at FCS.

        o   11/750 CPU must have a minimum of 2 megabytes of physical memory.

        o   Requires VMS version 3.5 or higher.  3.5 requires CPU to have a
            local disk. Only VMS operating system supported.

        o   11/750 CPU without a UDA50 must be at Revision 50/58 or higher -
            i.e. PCS (L0008-YA or L0008-YB hardware) must be installed in Slot
             5 of the CPU.

            11/750s running UDA50s must be at Rev 70/78.

        o   Minimum 11/750 (PCS) microcode revision is 97.

        o   Diagnostics

                Diag        Minimum Rev         Title
                ----        -----------         -----
                ECSAA           6.11            Diag Supervisor
                ECCGA           1.0             CI750 Repair Level Diag 1
                ECCGB           1.1               "      "     "     "  2
                ECCGC           1.0               "      "     "     "  3
                ECCGD           1.1               "      "     "     "  4
                ECCGE           1.1               "      "     "     "  5
                EVGAA           1.1             CI  Functional Diag 1
                EVGAB           1.1             "      "     "   "  2

        CI750-B1 REVISION SUMMARY
        -------------------------
        o   Creation date is November 1984 - mfg. ship date.

        o   CI750-B1 ECOs:

            ECO #        Part Rev   Problem/Correction          Quick Check
            -----        --------   ------------------          -----------
            L0101-TW006  H1         1. Virtual circuits
                                       are closed by un-
                                       recognized commands.
                                    2. Virtual circuit
                                       closure due to micro
                                       confusion.
                                    3. Port hangs due to conflict
                                       in queue access.

                                    Correction is V3.0 CI
                                    microcode.

            NOTE THAT L0101 REV H1 AND CI780.BIN REV 3.0 MUST BE USED TOGETHER.





        o   FCO to upgrade all CI750s will be implemented in December 1984.

                EQ-01309-01     ROMS for L0101 module
                EQ-01309-02     11/750 Console, BE-T204G-ME
                                (CI780.BIN Rev 3.0)

        o   This FCO is part of VAXcluster Rev D1.  Other FCOs that could
            be needed to bring the Cluster to Rev D1 are:

                     FCO                H/W Rev

                CI780-R-00C1            Rev C1
                HSC50-R-0006            Rev C1
                RA80X-R-0002            Rev B0
                RA60-R-0003             Rev A5

            These FCOs should be installed prior to or during VMS V4.0
            installation.  Note that although VMS Release notes state that
            earlier revisions are acceptable, i.e. will probably work,
            engineering and product management has determined that the
            customer needs all these FCOs for acceptable cluster performance
            under VMS V4.0.

            Details of Cluster Rev D1 requirements were sent to all branch
            managers.

            Contact your regional/country FCO coordinator for ordering info
            on these FCOs.

            Refer to the Cluster Revision Control document for more information
            on Cluster Rev D1 requirements.

        o   Minimum requirement for CI functional diagnostics (EVGAA, EVGAB)
            is 1.1.

CI750-C1 REVISION SUMMARY
-------------------------
        o  Creation date is May 1985 - mfg. ship date.

        o  Problem/Symptom:  Funcional Problems discovered in testing:

           ECO #        Part Rev   Problem/Correcrtion            Quick Check
           -----        --------   -------------------            -----------
           L0101-TW006  H1         1.  FCO CI750-R00B1 V3.0
                                       microcode introduced "MISC.
                                       ERROR TYPE-12 & 13 (hex B & C)",
                                       in variance with CI-Arch. Spec.,
                                       and resulting in VMS CI-PORTS
                                       RE-INITS.

                                       Correction:
                                       Release of V4.0 CI-MICROCODE




                                -39-

NOTE:  This FCO includes CI750-R00B1, released 27-Nov-84 and ammended 20-Feb-85.
       CI750-R00B1 is not a prerequisite.

        o  FCO to upgrade all CI750s will implemented in May, 1985.

                EQ-01343-02     11/750 Console, BE-T204H-ME
                                (CI780.BIN Rev 4.0)

               If your system is not at "B1", also order

                EQ-01343-01     ROMS for the L0101 module

CI750 Revision "D1"**
---------------------
        o  Creation Date - November 1985.

           This revision changed the CI750 from "C" to "D".  There was no
           hardware ECO required.  This was a microcode change only.  The
           CI780.BIN file changed from V3.0 to V4.0 - console media BE-T204I-DE.
           This fixed problems found during extensive in-house testing of very
           large VAXclusters under specific conditions, where the CI750 interface
           will sometimes incorrectly recover from CI error conditions.

           Comments:  An FCO was generated.  It was recommended that the new
                       FCO be implemented on all CI750's and VAX8600's.

           EQ-01364-01  -  CI780.BIN Rev. V5.0 (11/750 console media)

CI750 Revision "E1"**
-------------------
        o  Creation Date - July, 1986

           This revision changes the CI750 from "D1" to "E1".
           This revision change involved an ECO to the L0101 as follows:

                L0101-MK009     - 1. Numerous Functional Errors ("arbitration
                                     timeout", "internal queue retry error").

                                  2. Need a variable sanity timer.

                                  3. Need to check the "valid" bit when
                                     referencing a cached buffer descriptor.

                                  4.  Correct documentation errors.

           This is a microcode and ROM change.  Requires CI780.BIN V7.0
           BE-T204I-DE.

           Comments:  An FCO was generated which brought the CI750 to Rev "E1".
                      This FCO, CI750-E1-I004,  should have been installed on
                      all CI750s.



                                -40-

                EQ-01421-01     ROMS for the L0101 module
                EQ-01421-02     CI780.BIN V7.0 (11/750 console media with
                                diagnostics)
                EQ-01421-03     CI780.BIN V7.0 (11/750 console media without
                                diagnostics)
                FA-04706-01     FCO Document (included with all EQ kits)

                L0101-MK010 -   1. Paths crossed, REQID sent on path A,
                                   response on path B.

                                2. Clock the transmit enable flop correctly
                                   to prevent cluster hang.

                Rework is two etch cuts and two wire adds. This ECO brings
                the L0101 to Rev "K1". Module Part Revs "J1" and "K1" are both
                acceptable in CI750 Rev "E1".

CI750 Revision "F1"
-------------------

        o  Creation Date - September, 1988

           This revision changes the CI750 from "E1" to "F1"

           This revision change involved the following eco:

                L0009-MK003 -  1. CMI control state machine selects
                                  incorrect command/address and
                                  function/vector register data onto
                                  the bus during certain state
                                  transitions. Problem observed after
                                  detection of CRD Memory error by the
                                  port CMI interface and  may result in
                                  data corruption.

        Comments: An FCO is being generated from the L0009-MK003 ECO.
                  FCO is CI750-I006. This will be done in all CI750s.

                  FCO estimated to begin September, 1988.

                  EQ-01497-01     Contains microcode ROM.

                  EQ-01497-02     Contains L0009 Module Rev B2 or C3.
                   FA-04792-01    Contains FCO document.

        NOTE:   Rev "F1" may also include FCO CI750-I005 for clusters
                containing 6 nodes and above. This FCO involves an eco
                to the L0118 module as follows:

                L0118-LK002 - Too many etch cuts and wires on board. New
                etch rev requires extra jumpers and stake pins.

                Implementation of FCO CI750-I005 began May, 1988.







CI750 Revision "H3"
------------------

        o  Creation date is May 1988.

        o  This revision changed the CI750 from "F" to "H".

        o  This revision documents the introduction of the LO118 module

           Problem/Correction - N/A.

           Quick Check - verify module is LO118.

Diagnostic Release 28 (EVNDX 28) contains the minimum usable diagnostics for
the LO118 module.

\\VAX_REV_MATRIX