M9301 ROM - Revision history

Jnc: /* External links */ typos

2021-12-07T17:41:37Z

‎External links: typos

Jnc: /* External links */ +Manual, eng drws

2021-12-07T17:40:02Z

‎External links: +Manual, eng drws

Jnc: /* Configuration switches */ power-up vector forcing method

2021-12-06T11:12:39Z

‎Configuration switches: power-up vector forcing method

Jnc: +img

2021-12-05T02:01:52Z

+img

Jnc: Better cat

2021-08-22T08:42:00Z

Better cat

Jnc: avoid redir

2020-10-29T16:58:41Z

avoid redir

Jnc: +cats

2018-12-16T15:10:18Z

+cats

Jnc: /* M9301-YF */ Note manual conflict

2018-09-10T21:14:46Z

‎M9301-YF: Note manual conflict

Jnc: /* Entry points */ Add -YB, -YF

2018-09-10T21:07:49Z

‎Entry points: Add -YB, -YF

Jnc: Add some links

2018-09-10T15:29:13Z

Add some links

@@ Line 177: / Line 177: @@
 * [[UNIBUS boot ROMs]]
-==External links===
+==External links==
 * [http://www.bitsavers.org/pdf/dec/unibus/EK-M9301-TM-001_M9301_Bootstrap_Terminator_Module_Maintenance_and_Operators_Manual_Jun77.pdf M9301 bootstrap/terminator module maintenance and operator's manual]  (EK-M9301-TM-001)
-* [www.bitsavers.org/pdf/dec/unibus/M9301_RevV_Engineering_Drawings_Dec77.pdf UNIBUS Terminator/Bootstrap Engineering Drawings]
+* [http://www.bitsavers.org/pdf/dec/unibus/M9301_RevV_Engineering_Drawings_Dec77.pdf UNIBUS Terminator/Bootstrap Engineering Drawings]
 * [http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/ROMs/M9301-YA.mac Disassembled and commented M9301-YA ROM code]
 * [http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/ROMs/M9301-YB.mac  Disassembled and partially commented M9301-YB ROM code]

@@ Line 177: / Line 177: @@
 * [[UNIBUS boot ROMs]]
-==Reference==
+==External links===
 * [http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/ROMs/M9301-YA.mac Disassembled and commented M9301-YA ROM code]
 * [http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/ROMs/M9301-YB.mac  Disassembled and partially commented M9301-YB ROM code]

@@ Line 21: / Line 21: @@
 If S1-1 is set to 'off' (open), the low bank of memory on the card (765000-765777) is disabled; when 'on' (closed) it is enabled.
-If S1-2 is 'off', the system will power-up normally; if 'on', the CPU will obtain its new PC/PS pair from locations 173024 on the card, which contain a mixture of bits from the ROM (high bits) and the configuration switch (low bits), which can be used to force the CPU to start executing in the ROM on power-on.
+If S1-2 is 'off', the system will power-up normally; if 'on', the CPU will obtain its new PC/PS pair from locations 173024 on the card, which contain a mixture of bits from the ROM (high bits) and the configuration switch (low bits), which can be used to force the CPU to start executing in the ROM on power-on. (This is done by asserting the appropriate high address lines on the UNIBUS for the first two bus cycles after power-up; a technique pioneered by the [[BM873 ROM]].)
 Switches S1-3 through S1-10 contain bits 8 through 1 of the power-on PC (above); the exact meaning will depend on the board variant (below).

← Older revision		Revision as of 02:01, 5 December 2021
Line 1:		Line 1:
−	The '''M9301 ~~[[Read-only memory\|~~ROM]]''' card was a [[UNIBUS]] card for the [[PDP-11]] series of computers. It contained 512 words of memory, all readable directly from the UNIBUS (i.e. not windowed). A [[Dual Inline Package\|DIP]] switch bank provided configuration. The M9301 also provided [[terminator\|termination]] for the UNIBUS.	+	[[Image:M9301.jpg\|250px\|thumb\|right\|M9301 card]]
		+
		+	The '''M9301 ROM''' card was a [[UNIBUS]] [[Read-only memory\|ROM]] card for the [[PDP-11]] series of computers. It contained 512 words of memory, all readable directly from the UNIBUS (i.e. not windowed). A [[Dual Inline Package\|DIP]] switch bank provided configuration. The M9301 also provided [[terminator\|termination]] for the UNIBUS.

	It was a [[DEC card form factor\|dual]] format card, intended for use in the [[DEC edge connector contact identification\|two top (AB) connectors]] of a [[Modified UNIBUS Device\|MUD]] slot, or in a UNIBUS in/out slot.		It was a [[DEC card form factor\|dual]] format card, intended for use in the [[DEC edge connector contact identification\|two top (AB) connectors]] of a [[Modified UNIBUS Device\|MUD]] slot, or in a UNIBUS in/out slot.

← Older revision		Revision as of 08:42, 22 August 2021
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	[[Category: UNIBUS ROMs]]		[[Category: UNIBUS ROMs]]
−	~~[[Category: DEC Boards]]~~

@@ Line 31: / Line 31: @@
 ==Variants==
-* M9301-YA - (ROMs 034A9, 035A9, 036A9, 037A9) - [[PDP-11/04]] and [[PDP-11/34]] [[Original Equipment Manufacturer|OEM]] version; had basic diagnostics, console emulator, booted from various devices ([[RK11]] and [[RP11]] disks, [[TC11]] [[DECtape]], [[TM11]] magnetic tape, serial line, [[PC11]] high-speed paper-tape reader, [[TA11]] casette tape, [[RX11]] 8-inch [[floppy disk]]), supported auto-boot on power on, and also power-fail restart
+* M9301-YA - (ROMs 034A9, 035A9, 036A9, 037A9) - [[PDP-11/04]] and [[PDP-11/34]] [[Original Equipment Manufacturer|OEM]] version; had basic diagnostics, console emulator, booted from various devices ([[RK11 disk controller|RK11]] and [[RP11 disk controller|RP11]] disks, [[TC11]] [[DECtape]], [[TM11]] magnetic tape, serial line, [[PC11]] high-speed paper-tape reader, [[TA11]] casette tape, [[RX11 floppy disk controller|RX11]] 8-inch [[floppy disk]]), supported auto-boot on power on, and also power-fail restart
 * M9301-YB - (ROMs 038A9, 039A9, 040A9, 041A9) - /04 and /34 end user version; had basic diagnostics, console emulator, booted from various devices (RK11, RP11, TC11, TM11, TA11, RX11, serial line, high-speed paper-tape reader, RJS, RJP, TJU), also power-fail restart
-* M9301-YC - [[PDP-11/70]] version; contained basic CPU, cache and memory diagnostics, booted from various devices (TM11, TC11, RK11, RP11, [[RK06]], RJS, RJP, TJU, RX11)
+* M9301-YC - [[PDP-11/70]] version; contained basic CPU, cache and memory diagnostics, booted from various devices (TM11, TC11, RK11, RP11, [[RK611 disk controller|RK611]], RJS, RJP, TJU, RX11)
 * M9301-YD - All models; contained code to allow a terminal attached to the machine to be a terminal on some other line; also had boot code for RX11 and [[DDCMP]]

← Older revision		Revision as of 15:10, 16 December 2018
Line 185:		Line 185:
	* [http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/ROMs/M9301-YF.mac Disassembled and partially commented M9301-YF ROM code]		* [http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/ROMs/M9301-YF.mac Disassembled and partially commented M9301-YF ROM code]
	* [http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/ROMs/M9301-YH.mac Disassembled but mostly un-commented M9301-YH ROM code]		* [http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/ROMs/M9301-YH.mac Disassembled but mostly un-commented M9301-YH ROM code]
		+
		+	[[Category: UNIBUS ROMs]]
		+	[[Category: DEC Boards]]

← Older revision		Revision as of 21:14, 10 September 2018
Line 168:		Line 168:

	Note that switch S1-1 must be on for all the choices ''with'' diagnostics, and also the console emulation and power-fail restart choices.		Note that switch S1-1 must be on for all the choices ''with'' diagnostics, and also the console emulation and power-fail restart choices.
		+
		+	''*'' - The manual gives the 16540x locations for manual start locations, but the configuration DIP switch settings correspond to the 17300x locations.

	==See also==		==See also==

@@ Line 82: / Line 82: @@
 | 173626 || TA11 Boot (no diagnostics)
 |-
-| 173640 || RX11 Boot w/ Diagnostics
+| 173636 || RX11 Boot w/ Diagnostics
 |-
-| 173642 || RX11 Boot (no diagnostics)
+| 173640 || RX11 Boot (no diagnostics)
 |-
 | 173650 || DL11 Boot w/ Diagnostics
@@ Line 94: / Line 94: @@
 | 173662 || PC11 Boot (no diagnostics)
 |}
 ==See also==

@@ Line 1: / Line 1: @@
-The '''M9301 [[Read-only memory|ROM]]''' card was a [[UNIBUS]] card for the [[PDP-11]] series of computers. It contained 512 words of memory, all readable directly from the UNIBUS (i.e. not windowed). A [[Dual Inline Package|DIP]] switch bank provided configuration. The M9301 also provided [[termination]] for the UNIBUS.
+The '''M9301 [[Read-only memory|ROM]]''' card was a [[UNIBUS]] card for the [[PDP-11]] series of computers. It contained 512 words of memory, all readable directly from the UNIBUS (i.e. not windowed). A [[Dual Inline Package|DIP]] switch bank provided configuration. The M9301 also provided [[terminator|termination]] for the UNIBUS.
 It was a [[DEC card form factor|dual]] format card, intended for use in the [[DEC edge connector contact identification|two top (AB) connectors]] of a [[Modified UNIBUS Device|MUD]] slot, or in a UNIBUS in/out slot.
-Most versions were used for [[bootstrap|bootstrapping]] the machine, from [[disk]], paper and magnetic tape, etc, but it could be use for any purpose; most DEC-supplied pre-programmed versions included a console emulator, and basic diagnostics. A command to boot the machine could be given in the emulator, using a symbolic [[DEC bootstrap device codes|device code]].
+Most versions were used for [[bootstrap|bootstrapping]] the machine, from [[disk]], [[paper tape]], [[magnetic tape]], etc, but it could be use for any purpose; most [[Digital Equipment Corporation|DEC]]-supplied pre-programmed versions included a console emulator, and basic [[diagnostic]]s. A command to boot the machine could be given in the emulator, using a symbolic [[DEC bootstrap device codes|device code]].
-It used four 4-bit wide [[PROMs]] to hold the data. The board occupied addresses 773000-773776 and 765000-765776; a configuration switch allowed the lower block to be disabled.
+It used four 4-bit wide [[PROM]]s to hold the data. The board occupied [[address]]es 773000-773776 and 765000-765776; a configuration switch allowed the lower block to be disabled.
-Other configuration switches controlled which address the CPU jumped to on power on (a clever kludge, controlled by another configuration switch, allowed the board to force the CPU to read its power-on PC and PS from the ROM, at a location set by still other configuration switches, thereby allowing auto-boot on power-on).
+Other configuration switches controlled which address the [[Central Processing Unit|CPU]] jumped to on power on (a clever kludge, controlled by another configuration switch, allowed the board to force the CPU to read its power-on [[Program Counter|PC]] and [[Processor Status Word|PS]] from the ROM, at a location set by still other configuration switches, thereby allowing auto-boot on power-on).
 The board came in several main variants, designated M9301-Yx (where 'x' is a capital letter, starting with 'A') came pre-programmed from DEC to perform various functions.
@@ Line 31: / Line 31: @@
 ==Variants==
-* M9301-YA - (ROMs 034A9, 035A9, 036A9, 037A9) - [[PDP-11/04]] and [[PDP-11/34]] [[OEM]] version; had basic diagnostics, console emulator, booted from various devices ([[RK11]] and [[RP11]] disks, [[TC11]] [[DECtape]], [[TM11]] magnetic tape, serial line, high-speed paper-tape reader, [[TA11]] casette tape, [[RX11]] 8-inch floppy), supported auto-boot on power on, and also power-fail restart
+* M9301-YA - (ROMs 034A9, 035A9, 036A9, 037A9) - [[PDP-11/04]] and [[PDP-11/34]] [[Original Equipment Manufacturer|OEM]] version; had basic diagnostics, console emulator, booted from various devices ([[RK11]] and [[RP11]] disks, [[TC11]] [[DECtape]], [[TM11]] magnetic tape, serial line, [[PC11]] high-speed paper-tape reader, [[TA11]] casette tape, [[RX11]] 8-inch [[floppy disk]]), supported auto-boot on power on, and also power-fail restart
 * M9301-YB - (ROMs 038A9, 039A9, 040A9, 041A9) - /04 and /34 end user version; had basic diagnostics, console emulator, booted from various devices (RK11, RP11, TC11, TM11, TA11, RX11, serial line, high-speed paper-tape reader, RJS, RJP, TJU), also power-fail restart