What Makes A PDP-11/35 Tick?

Published Thursday, August 2 2012

This is what makes a PDP-11/35 or PDP-11/40 tick. It turns out to be 421 ICs. Impressive!

I needed to know what TTL ICs I might need to order replacements for, so I decided to tally up exactly which ones go into making a KD11-A CPU. This information comes straight from the PDP-11/40 Engineering Drawings, which list a summary of ICs used in each module on the first page of the module’s drawings.

It may be useful for someone else, so I figured I’d post it here.

ICKY11-KM7231M7232M7233M7234M7235TOTAL
7400310720
740273717
74047714
7410538
74123347
7415033
7415122
7415317118
741574116
7417412820
741751416
7418144
7418211
742044
743022
745022
747471320
74H002146224
74H044311422
74H102384421
74H11177419
74H20275115
74H214217
74H30156
74H401539
74H5034411
74H52527
74H53433212
74H55112
74H601214
74H61112
74H74195116
DEC 23B00A211
DEC 23B01A211
DEC 23B02A211
DEC 23B03A211
DEC 23B06A211
DEC 23B07A211
DEC 23B08A211
DEC 23B10A211
DEC 23B11A211
DEC 23B12A211
DEC 23B35A211
DEC 23B40A211
DEC 23B41A211
DEC 23B42A211
DEC 3101A44
DEC 38084113
DEC 824233
DEC 8251628
DEC 8815964524
DEC 8881136524
———––––––—––—––—––—––—––—––
TOTAL421

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