Any difference between VAX Q-bus and PDP-11 Q-bus cards?

Jon Elson elson at
Wed Dec 6 20:55:38 CST 2017

On 12/03/2017 10:28 AM, Aaron Jackson via cctech wrote:
> I'm looking after a VAX 4000 for a friend, which has a SCSI Q-bus card
> (M5976). If the card did not have the large metal face, would it work in
> a Q-bus PDP-11? We are not going to potentially ruin a card by trying
> this, but I am interested to know if this is the case.
As long as the PDP supports the 22-bit Q-bus, it should work 
perfectly.  The metal plate can be removed.


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