Aside from the RT11 things, you do realize that the RA80 has a 8080cpu
and a pretty hot diagnostic system built into it, correct? I was able to
fix my RM80 (with the MASSBUS personality module) using the lights and
switches in there. It will pretty much tell you everything that's going on.

CZ


will kranz wrote:
> I have a Vax-750 that I periodically attempt to boot, something like
> once every 4 years, and its about time. I know this is a PDP newsgroup
> but there has been a fair amount of Vax stuff recently and this is
> actually sort of on topic.
>
> Its my understanding that the Vax-750 had some sort of compatibility
> mode for RT11 (or is it generic 16 bit addressing)? Anyone know how to
> access and or control this? My diagnoistics tapes and consol tapes
> seem to be in RT11 format, not files11, although the home block
> format string is "DECVMSEXCHNG". If I could run it as a PDP11
> off the functional RL02 I might get further figuring out why the
> RA80 doesn't work.
>
> A bit further from PDP11s but of interest regarding this, what are
> the following from consol tape?
> BOOT58.EXE 02-20-85 23 blocks 14 start block
> CI780 .BIN 02-20-85 36 blocks 37 start block
> VMB .EXE 02-20-85 40 blocks 149 start block
>
> If this is well covered somewhere a link would be great.
> It seems to need a fair amount of this data from the
> TU58 consol tape before it will attempt to do anything. The
> recent comments about loading microcode patches was interesting.
> Presumably thats what CI780.bin is but why 780???
>>From other reading, I believe it ultimately loads VMB.exe but don't

> know what this really is. Is this specific to early Vaxen
> like the 750? Is the equivalent in ROM on the microvax?
>
> Guess the other possibility is that the default state is a pdp11
> with a Unibus, and it only becomes a Vax via VMB.exe?
>
> Hints appreciated, Will
>
>
>
> At 09:54 AM 05/05/05 -0400, Bill Pechter wrote (in part):
> Original Thread Re: Does anyone here have an 11/60?
>
>
>>The 8650 was a beautiful machine...
>>
>>'Course running full blown RT11 on the front end was nice... Running
>>adventure from an RL pack during PM was kind of fun.

>
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