M9301-YB ROM flaky

Noel Chiappa jnc at mercury.lcs.mit.edu
Wed Jul 5 14:17:15 CDT 2017

    > From: William Degnan

    > what is the memory range

That's in the disassembly page: 


765000-765776 and 773000-773776

    > can you post the ROM dump so I can compare on my end?

Well, the contents are in that page too, but here's the output of my ROM
dumper (URL posted further back in the thread):


if you just want to do a 'diff' (download the ROM dumper .LDA, run it, and
compare its output).

    > call up same in PDPGUI and compare there

I don't know what format PDPGUI uses; I don't use it (don't remember why).

I wrote a bespoke PDP-11 console program that runs under Unix V6 (the same as
we had BITD; when I wrote this code, I didn't have access to all the MIT
sources, so I had to re-write it); that way I can either use it on my Windoze
box - under Ersatz-11 - or on real PDP-11 hardware, going from one machine to


More information about the cctech mailing list