uVAX II Memory Board

From: ajp166 <ajp166_at_bellatlantic.net>
Date: Fri Feb 2 17:54:02 2001

>I have an interesting question. Can this board be used as additional
ram
>in a PDP-11? If so, how might it be done?
>
>I have a Qbus Memory board that must be from a uVAX II - M7609-AP
>with 288 (I hope I counted correctly) memory chips
>4256L-15 8726255 A 21-22422-42 R with the
>a standard male 50 pin header at the top to be connected to a uVAX
>CPU.

>If my arithmetic is normal, does this make it an 8 MByte memory?


It's a microvax memory most likely. PDP-11 can address a maximum of
4mb.

>But, is there any way that a regular PDP-11/73 could see this memory
>and use it in some manner?


No, it's not compatable.

>I don't expect that anyone will want it, but if so, can I swap it for a
regular
>PDP-11 Qbus memory of 4 MBytes?


That should be possible but I think the largest common memory board
for PDP-11 Q-bus is 1MB.

Allison
Received on Fri Feb 02 2001 - 17:54:02 GMT