fredag 6 maj 2016 skrev Josh Dersch <[email protected]>: > On 5/6/16 6:26 AM, Noel Chiappa wrote: > >> > 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. >> > 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_Engineering_Drawings_Jul76.pdf E102 / A04A2, E112 / A10A2, E103 / A20A2 and E114 / A11A2. Are there plenty of different versions of PCB and microcode?? > > /Mattis
