VAX Q-bus identical to PDP-11 Q-bus?

Glen Slick glen.slick at
Wed Dec 6 15:33:06 CST 2017

An M5976 KZQSA is not MSCP compatible so it wouldn't do any good with a
PDP-11 system. It's really only useful for RRD4x SCSI CD-ROM drives with
VMS on a VAX 4000.

On Dec 6, 2017 9:47 AM, "Aaron Jackson via cctech" <cctech at>

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.



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