Difference between revisions of "KD11-A CPU"

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The [[Berg connector]]s on the M7232 carry the microcode bus to the KE11-E EIS card; note also the metal handle on this card, even though it is only a quad card; it and the KE11-F FIS card are the only non-[[QBUS]] quad cards with such a handle.
 
The [[Berg connector]]s on the M7232 carry the microcode bus to the KE11-E EIS card; note also the metal handle on this card, even though it is only a quad card; it and the KE11-F FIS card are the only non-[[QBUS]] quad cards with such a handle.
  
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All of them plugged into a [[wire-wrap]]ped custom [[backplane]] dual [[system unit]]. The KE11-E Extended Instruction Set, KE11-F Floating Instruction Set, and KT11-D Memory Management option cards all plugged into pre-wired slots in this backplane, as did the KJ11-A Stack Limit Register and the KW11-L Line Time Clock.
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All of them plugged into a [[wire-wrap]]ped custom 9-slot [[backplane]] dual [[system unit]]. The optional KE11-E Extended Instruction Set, KE11-F Floating Instruction Set, and KT11-D Memory Management option cards all plugged into pre-wired slots in this backplane, as did the KJ11-A Stack Limit Register and the KW11-L Line Time Clock. This left one unused slot, which was wired as a UNIBUS [[Small Peripheral Controller|SPC]] slot; that slot also contained the 'UNIBUS out'.
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Board locations are:
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<!-- (as seen from the board insertion side of the backplane, not the wire-wrap pin side, as is common in [[Digital Equipment Corporation|DEC]] documentation) -->
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{| class="wikitable"
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! !! colspan="6" | Connector
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|-
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! Slot !! A !! B !! C !! D !! E !! F
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|-|| style="text-align:center;" | KM11-A (KT, KE)
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| 1 || colspan="4" style="text-align:center;" | M7239 FIS || style="text-align:center;" | KM11-A (KT, KE) || style="text-align:center;" | KM11-A (KD)
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|-
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| 2 || colspan="6" style="text-align:center;" | M7238 EIS
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|-
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| 3 || colspan="4" style="text-align:center;" | M7232 u Word || style="text-align:center;" | KJ11-A || style="text-align:center;" | KW11-L
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|-
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| 4 || colspan="6" style="text-align:center;" | M7231 Data Path
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|-
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| 5 || colspan="6" style="text-align:center;" | M7233 IR Decode
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|-
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| 6 || colspan="6" style="text-align:center;" | M7235 Status
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|-
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| 7 || colspan="6" style="text-align:center;" | M7234 Timing
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|-
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| 8 || colspan="6" style="text-align:center;" | M7236 KT11-D
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|-
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| 9 || colspan="2" style="text-align:center;" | UNIBUS Out || colspan="4" style="text-align:center;" | SPC
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|}
  
 
==External links==
 
==External links==

Revision as of 17:17, 31 March 2020

The KD11-A PDP-11 CPU for the PDP-11/35 and PDP-11/40 was a multi-board micro-programmed processor.

Support for the EIS was optional, with the KE11-E Extended Instruction Set, a hex card. There was also optional floating point hardware, the KE11-F Floating Instruction Set, a quad card; it was not the full FP11 Floating Point, but the minimal FIS floating point.

Memory management support was also optional, with the KT11-D Memory Management, another hex card; it too was not the full PDP-11 Memory Management, but the simplified subset.

Other CPU options included the KJ11-A Stack Limit Register, and the KW11-L Line Time Clock (the latter being a standard option across a number of PDP-11 CPUs).

Implementation

M7232 card from KD11-A

The basic KD11-A was contained on four hex cards:

  • M7231 - Data Paths
  • M7233 - IR Decode
  • M7234 - Timing
  • M7235 - Status

and one quad card:

  • M7232 - μword

The Berg connectors on the M7232 carry the microcode bus to the KE11-E EIS card; note also the metal handle on this card, even though it is only a quad card; it and the KE11-F FIS card are the only non-QBUS quad cards with such a handle.

All of them plugged into a wire-wrapped custom 9-slot backplane dual system unit. The optional KE11-E Extended Instruction Set, KE11-F Floating Instruction Set, and KT11-D Memory Management option cards all plugged into pre-wired slots in this backplane, as did the KJ11-A Stack Limit Register and the KW11-L Line Time Clock. This left one unused slot, which was wired as a UNIBUS SPC slot; that slot also contained the 'UNIBUS out'.

Board locations are:

Connector
Slot A B C D E F
1 M7239 FIS KM11-A (KT, KE) KM11-A (KD)
2 M7238 EIS
3 M7232 u Word KJ11-A KW11-L
4 M7231 Data Path
5 M7233 IR Decode
6 M7235 Status
7 M7234 Timing
8 M7236 KT11-D
9 UNIBUS Out SPC

External links

Retrieved from "https://gunkies.org/w/index.php?title=KD11-A_CPU&oldid=22156"