KDJ11-A CPU: Difference between revisions

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[[Image:KDJ11-A.jpg|150px|thumb|right|KDJ11-A CPU]]
[[Image:KDJ11-A.jpg|200px|thumb|right|KDJ11-A CPU]]


The '''KDJ11-A''' CPU board (M8192) is the first [[QBUS]] [[CPU]] card using the [[J-11 chip set]] of the [[PDP-11]]. It is a [[DEC card form factor|dual-height]] board, and was used to upgrade [[PDP-11/23]] systems. (Confusingly, no DEC 'PDP-11/xx' system is specified as using the KDJ11-A.)
The '''KDJ11-A CPU''' board (M8192) is the first [[QBUS]] [[PDP-11]] [[Central Processing Unit|CPU]] card using the [[J-11 chip set]]. It is a [[DEC card form factor|dual-height]] board, and was used to upgrade [[PDP-11/23]] systems. (Confusingly, no DEC 'PDP-11/xx' system is specified as using the KDJ11-A.)


It contains an 8K-byte write-through cache (set size 1, block size 1 16-bit word), protected by parity; cache control logic inspects [[DMA]] transfers and invalidates cache entries for memory which is written to by a device.
It contains an 8K-byte write-through [[cache]] (set size 1, block size 1 16-bit word), protected by [[parity]]; cache control logic inspects [[Direct Memory Access|DMA]] transfers on the QBUS and invalidates cache entries for [[main memory]] which is written to by a [[peripheral|device]].


It also provides a set of diagnostic [[LED]]s, and a Line Time Clock; but no other devices (boot PROM, serial line, etc).
It also provides a set of diagnostic [[Light Emitting Diode|LED]]s, and a [[line time clock]]; but no other devices (boot [[PROM]], [[serial line]], etc). Both the LTC, and its control [[register]], are enabled by a single configuration [[jumper]] (below).


Although the J-11 does implement [[FP11 floating point|FP11]] floating-point, the board can also use the optional [[FPJ11 floating point accelerator]] [[integrated circuit|chip]]; note that only the -YB version of the board operates correctly with the FPJ11.
Although the J-11 does implement [[FP11 floating point|FP11]] floating-point, the board can also use the optional [[FPJ11 floating point accelerator]] [[integrated circuit|chip]]; note that only the -YB version of the board operates correctly with the FPJ11.
==Configuration==
A limited amount of configuration can be done with a set of nine jumpers (in the middle of the card).Their functions are:
{| border=1
! Jumper !! Function !! In || Out
|-
|W1 || [[Bootstrap]] [[address]] bit 15 || 1 || 0
|-
|W2 || Bootstrap address bit 14 || 1 || 0
|-
|W3 || Powerup option bit 2
|-
|W4 || Bootstrap address bit 13 || 1 || 0
|-
|W5 || [[Halt]] enable || Halt || [[Trap]] to 4
|-
|W6 || Bootstrap address bit 12 || 1 || 0
|-
|W7 || Powerup option bit 1
|-
|W8 || Wakeup circuit || Disabled || Enabled
|-
|W9 || BEVNT/LTC register || Disabled || Enabled
|}
Powerup options are:
{| border=1
! W3 !! W7 !! Action
|-
| In || In || [[Program Counter|PC]] from 024, [[Processor Status Word|PS]] from 026
|-
| In || Out || [[QBUS CPU ODT|ODT]], PS=0
|-
| Out || In || PC=0173000, PS=340
|-
| Out || Out || PC=configuration jumpers, PS=340
|}


{{PDP-11}}
{{PDP-11}}

Revision as of 23:03, 20 May 2020

KDJ11-A CPU

The KDJ11-A CPU board (M8192) is the first QBUS PDP-11 CPU card using the J-11 chip set. It is a dual-height board, and was used to upgrade PDP-11/23 systems. (Confusingly, no DEC 'PDP-11/xx' system is specified as using the KDJ11-A.)

It contains an 8K-byte write-through cache (set size 1, block size 1 16-bit word), protected by parity; cache control logic inspects DMA transfers on the QBUS and invalidates cache entries for main memory which is written to by a device.

It also provides a set of diagnostic LEDs, and a line time clock; but no other devices (boot PROM, serial line, etc). Both the LTC, and its control register, are enabled by a single configuration jumper (below).

Although the J-11 does implement FP11 floating-point, the board can also use the optional FPJ11 floating point accelerator chip; note that only the -YB version of the board operates correctly with the FPJ11.

Configuration

A limited amount of configuration can be done with a set of nine jumpers (in the middle of the card).Their functions are:

Jumper Function In Out
W1 Bootstrap address bit 15 1 0
W2 Bootstrap address bit 14 1 0
W3 Powerup option bit 2
W4 Bootstrap address bit 13 1 0
W5 Halt enable Halt Trap to 4
W6 Bootstrap address bit 12 1 0
W7 Powerup option bit 1
W8 Wakeup circuit Disabled Enabled
W9 BEVNT/LTC register Disabled Enabled

Powerup options are:

W3 W7 Action
In In PC from 024, PS from 026
In Out ODT, PS=0
Out In PC=0173000, PS=340
Out Out PC=configuration jumpers, PS=340


v • d • e PDP-11 Computers and Peripherals
UNIBUS PDP-11s - PDP-11/20 • PDP-11/15 • PDP-11/35 • PDP-11/40 • PDP-11/45 • PDP-11/50 • PDP-11/55 • PDP-11/70
PDP-11/05 • PDP-11/10 • PDP-11/04 • PDP-11/34 • PDP-11/60 • PDP-11/44 • PDP-11/24 • PDP-11/84 • PDP-11/94

QBUS PDP-11s - PDP-11/03 • PDP-11/23 • PDP-11/23+ • MicroPDP-11/73 • MicroPDP-11/53 • MicroPDP-11/83 • MicroPDP-11/93

QBUS CPUs: LSI-11 • LSI-11/2 • KDF11-A • KDF11-B • KDJ11-A • KDJ11-B • KDJ11-D • KDJ11-E

Buses: UNIBUS • UNIBUS map • SPC • MUD • EUB • QBUS • CD interconnect • PMI

Also: PDP-11 architecture • PDP-11 Extended Instruction Set • FP11 floating point • PDP-11 Memory Management

UNIBUS CPUs: KA11 • KC11 • KB11-A • KB11-B • KB11-C • KB11-D • KD11-A • KD11-B • KD11-D • KD11-E • KD11-EA • KD11-K • KD11-Z • KDF11-U

Co-processors: FP11-A • FP11-B • FP11-C • FP11-E • FP11-F • KE44-A • FPF11

Chips: LSI-11 • KEV11-A • KEV11-B • KEV11-C • F-11 • KEF11-A • KTF11-A • T-11 • J-11 • FPJ11

CPU options: KE11-E • KE11-F • KJ11-A • KT11-C • KT11-D • KK11-A • KK11-B • KT24 • KTJ11-B

Rare CPU options: KS11 Memory Protection and Relocation option • KT11-B Paging Option • KUV11 Writeable Control Store

Front panels: KY11-A • KY11-D • KY11-J • KY11-LA • KY11-LB • KY11-P

More on buses: UNIBUS and QBUS termination • Bus Arbitration on the Unibus and QBUS • CTI BUS

PDT-11s - PDT-11/110 • PDT-11/130 • PDT-11/150   CTI PDP-11s - PRO-325 • PRO-350 • PRO-380

Clones: CM 1420 • SM 1420

Other: FIS floating point • PDP-11 Commercial Instruction Set • PDP-11 stacks • PDP-11 family differences

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