[pups] pdp11/73 memory

Carl Lowenstein cdl at mpl.ucsd.edu
Sat Dec 13 08:49:51 AEST 2003

> From: "Christos Papachristou" <chpap at ics.forth.gr>
> To: <pups at minnie.tuhs.org>
> Date: Fri, 12 Dec 2003 18:31:12 +0200
> Subject: [pups] pdp11/73 memory
> I recently found a cabinet with a MicroVAX II (in 2 BA23 enclosures) and
> quite a lot storage devices on it. I plan to replace the MicroVAX II CPU
> module (M7606-AA) with a pdp11/73 CPU module (M8192) . I only have a
> 512k RAM module (M8067LA) for the pdp11/73 . The microVAX has two quad
> height memory modules , but I haven't checked yet whether they are 1, 2
> ,4 or 8 megs each (ie M7607,M7608 or M7609) .Is it possible to keep some
> of the MicroVAX memory modules if they are below or equal to 4 megs?  

MicroVAX memory uses a different interconnect scheme.
It is not in the Qbus address space.

    carl lowenstein         marine physical lab     u.c. san diego
                                                 clowenst at ucsd.edu

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