25 Jul
2016
25 Jul
'16
2:12 a.m.
On Sun, Jul 24, 2016 at 5:01 AM, Mattis Lind <mattislind at gmail.com> wrote:
b
After successfully repairing the G231 module of the
MM11-L set I continued
with the next one. This one was not able to access addresses ending 0100
(binary). Luckily it was not the transistors arrays that were bad but the
selector chip. A Signetics N8251 chip.
I suspect that since you've debugged it already, this won't help. Just in
case,
the datasheet is on page 52 of:
https://archive.org/details/bitsavers_signeticsdcs8000SeriesTTLMSI_11847693
/Mattis