Subject: Re: MicroVAX I questions.
To: Brian D Chase <bdc@world.std.com>
From: Arno Griffioen <arno@usn.nl>
List: port-vax
Date: 02/02/1999 13:17:12
> The machine also came with two M7551-CA MSV11 4Meg memory boards. If I
Hmm... Gimme, gimme, gimme! ;-)
I still have an 11/73 in dire need of some RAM for running UNIX
> power up the system with one or both of these, the diagnostics make it
> very quickly to a blinking 1. Now, as far as my best guess goes, the
> M7551 boards are actually for MicroPDP-11's. Were these also used in
Yup.
> MicroVAX I systems? I'm used to MicroVAX II's where the memory boards are
Don't know for sure, but i *think* they should work..
> cabled together with the CPU board. I suppose the MicroVAX I could be
> handling memory accesses through the Q-bus. And then it also has a DZV11
Yes, and I think that's why it has a max. RAM capacity of 4 Mbyte,
because that's the most the 22-bit Qbus can use. So 2 4 Mb RAM boards
would mean trouble..
Bye Arno.
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