Subject: Re: MicroVAX I questions.
To: Brian D Chase <>
From: Arno Griffioen <>
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


> 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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