21 Aug
2014
21 Aug
'14
12:30 p.m.
Thanks, Tony. I actually realized that late last night (and I feel like an
idiot for overlooking it). I've transcribed the ALU column over to a text
I'd better not start a thread pf the number of times I've felt like a
complete idiot. We'd all run out of disk space :-)
file and now I just need to reorder it by address
(rather than by symbol)
and convert it into a binary.
DEC (obviously) didn't wnt you to program your own PROMs, they expected
you to buy spares from them :-). So the listings wre not designed as PROM
programmign files, there are there, esentially, to expalin the operation
of the machine. And very useful they are too.
Hve yuo made sure no oher microcode PROM gives all 1's? IIRC these are
open-collector outptu PROMs, so if the enable cirucitry fails, all
outputs float (And are puleld to 1's bu the external resistors).
-tony