13 May
2019
13 May
'19
8:59 a.m.
Prime used 74181 chips for some of their CPUs. I have
a 150 CPU
board (1980, though it was likely a relatively minor rehash of an
older board), for example.
To extend this comment, I found 74S181 chips in the schematics for
Prime's first machines, the P100/P200/P300, with dates of 1972-73.
De