6 May
2016
6 May
'16
10:16 a.m.
fredag 6 maj 2016 skrev Josh Dersch <derschjo at gmail.com>:
/Mattis
On 5/6/16 6:26 AM, Noel Chiappa wrote:
I had two uCode ROMs fail, it was just that fun. Unfortunately they were
at E114 and E102 (A11A2 and A20A2), not E103 so my transcriptions aren't
going to help.
Now this is confusing. Maybe this related to why Bill thought I made a
typo. In the schematic I have which is the same as the one at bitsavers:
http://bitsavers.trailing-edge.com/pdf/dec/pdp11/1105/1105_RevAH_Engineerin…
E102 / A04A2, E112 / A10A2, E103 / A20A2 and E114 / A11A2.
Are there plenty of different versions of PCB and microcode??
From:
Mattis Lind
Has anyone dumped the microcode of the
PDP-11/05?
...
When tracing the microprogram flow it looks very suspicious.
Comparing
the same sequence with a better working pair
reveal a few
differences.
All these can be narrowed down to one single PROM
chip.
Josh had an 11/05 that had a uROM fail, and he had to blow a new one
(IIRC he
sent in a report, it's in the list archive). I'm not sure if it's the
same one
as the one you need, but if his post doesn't give the chip ID, no doubt
he can
let us know.