On Sep 7, 2016 1:08 AM, "JP Hindin" <jplist2...@kiwigeek.com> wrote: > > > Greetings; > > My googlefu is failing me and I was wondering if someone might be able to help me identify one of the boot ROMs present in an M9312 bootstrap/term board. The board has three ROMs, an RX01 (042130), an RX02 (042131) and then a mystery code - 043127. > > The M9312 ROM identification table does not list this ROM code - I suspect it _might_ be for a DSD combined 8" drive and Winchester disk box, but I'm under the impression this would appear as a DU device, and attempting to boot from DU gets an ILL CMD, suggesting otherwise. I tried all of the other possible mnemonics listed in the M9312 manual, so it doesn't appear to piggy-backing on any of those either. > > My thanks; > > - JP
Most ROM part numbers for the 9312 end in A9. I suggest you're looking up the wrong numbers. I have a list on my site, but the following is more comprehensive: http://www.ak6dn.com/PDP-11/M9312/ Bill