Type 75 Module Utilization List
Douglas W. Jones, Oct 22, 2026
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
BOC R203R203R203R111R302W501R202R107W040 W040W040W040W040W040W040W040W040W023
PB4 PB7 PB10 SKIP PUNCH START PUNCH RDY PUNCH ACT PWR CLR
PWR CLR
HOLE 8 HOLE 7 HOLE 6 HOLE 5 HOLE 4 FEED HOLE 3 HOLE 2 HOLE 1 PUNCH
CON
PB5 PB8 PB11 INT ENAB
PUNCH DONE PUNCH FLAG ENAB 7-6
ENAB 5-4
ENAB F-3
ENAB 2-1
PB6 PB9 — —

On the University of Iowa's PDP-8 S/N 85, this module utilization list replaces the section of DEC's Drawing D-34D-0-3 rev J from 10/11/67 that deals with the Type 75E High Speed Punch interface. That is, columns 15-32 of row C (or row BOC in DEC's notation, where the prefix B may mean I/O bus, and the prefix O may mean Oscilloscope, because this interface was bundled with the scope interface).