Difference between revisions of "KB11-D CPU"
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which comprise the KT11-CD (the M8108 Segmentation Status Registers board of the KT11-C was replaced with the M8108-YA variant). | which comprise the KT11-CD (the M8108 Segmentation Status Registers board of the KT11-C was replaced with the M8108-YA variant). | ||
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| + | * [http://www.bitsavers.org/pdf/dec/pdp11/1145/EK-KB11A-MM-004_Aug76.pdf KB11-A,D central processor unit maintenance manual] (EK-KB11A-MM-004) | ||
| + | * [http://www.bitsavers.org/pdf/dec/pdp11/1155/MP00039_1155vol1_Mar76.pdf 11/55 Vol. 1 Field Maintenance Print Set] (MP00039) - the KB11-D is on pp. 17-119 of the PDF | ||
| − | + | [[Category: PDP-11 UNIBUS Processors]] | |
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Latest revision as of 11:32, 11 October 2022
The KB11-D CPU is the later CPU for the PDP-11/45; it differed from the earlier KB11-A CPU in that is used the synchronous FP11-C Floating-Point Processor as its optional FPP. Both that and the optional KT11-C Memory Management Unit plugged into the CPU's backplane.
In addition to main memory on the UNIBUS, the KB11-A could also use the special high-speed MS11 Semiconductor Memory System, specific to the PDP-11/45, which plugged into a special bus, the Fastbus, which was also part of the CPU's backplane.
Boards
The KB11-D board set included many of the same boards as the KB11-A CPU:
- M8100 Data and Address Paths
- M8101 General Register and Control
- M8104 Processor Data and UNIBUS Registers
- M8105 Timing and Miscellaneous Control
- M8109 Timing Generator
with the following differences:
- The M8102 Instruction Register and Decode was replaced with the M8132
- The M8103 ROM and ROM Control was replaced with the M8123
- The M8106 UNIBUS and Console Control was replaced with the M8119
(Note that the M8132 and M8123 are shared with the KB11-C CPU of the PDP-11/70.)
In addition, the CPU includes either:
- M8116 Segmentation Jumper Board
used when the KT11-C Memory Management Unit (termed the KT11-CD in this CPU) is not present, or:
- M8107 Segmentation Address Paths
- M8108-YA Segmentation Status Registers
which comprise the KT11-CD (the M8108 Segmentation Status Registers board of the KT11-C was replaced with the M8108-YA variant).
External links
- KB11-A,D central processor unit maintenance manual (EK-KB11A-MM-004)
- 11/55 Vol. 1 Field Maintenance Print Set (MP00039) - the KB11-D is on pp. 17-119 of the PDF
