5 Jan
2005
5 Jan
'05
5:41 p.m.
Bob Supnik declared on Tuesday 04 January 2005 09:09 am:
I've finished, and am debugging, a VAX-11/780
simulator, with the goal
of running VMS V1, early BSD releases, and other 'first VAX' code.
There are a couple of critical missing pieces. In particular, I need
1) 780 PROM bootstrap contents. This was the 4KB of PROM located in
the MS780 memory controllers. A binary dump would be sufficient, the
simulator can dissassemble VAX code.
2) LSI11 console PROM contents. The LSI11 console ran out of a boot
PROM. This is less critical but would help with understanding the
fine details of the console-CPU interaction. Again, a binary dump
suffices.
I've most likely got copies of these in my /780. Sometime I need to get
back around to fixing that machine (IIRC, the CIB is probably broken, as
I can't see the registers and PROM on it from the LSI11). Hopefully
that's something simple that's broken (and is easily replacable) like
bus buffer chips or something. But, I digress. I'll go and grab the
cards out of the machine in a few minutes, and hook up the EPROM burner
tomorrow to read them.
3) VMS V1 floppy kit. While early tape distributions
have
been found, the console floppies have not. The most critical ones are
the tape restore program and the system bootstrap (VMB). Getting a
780 online required
I should have copies of these, but I don't know if I can get them read
in.
Pat
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