Question about memory boards used on VAX 11/7xx

From: Patrick Finnegan <>
Date: Mon Dec 27 09:52:24 2004

On Monday 27 December 2004 05:35, Pierre Gebhardt wrote:
> Hi all,
> I got 2 Memory Boards (National semiconductor) several weeks ago
> (each 1MB). Somerwhere on the net, someone says, that these can be
> used in VAX 11/7xx. Can I use these boards in my PDP 11/24, too ?
> I don't know yet, if 32bit boards can be used on 16bit machines and
> I'm afraid of putting them in and seeing some smoke when turning on
> the machine...

I doubt it. The 11/24 uses UNIBUS memory, and the 11/78x and 11/750
both have a special memory bus and controller (or multiple
controllers). I don't know enough about the 11/730 (& 11/725) to say
"definitely no" but it seems quite unlikely that they used straight
UNIBUS memory.

Purdue University ITAP/RCS        ---
The Computer Refuge               ---
Received on Mon Dec 27 2004 - 09:52:24 GMT

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