Problem with RF73 DSSI disk

Glen Slick glen.slick at
Fri Sep 4 12:14:24 CDT 2015

On Fri, Sep 4, 2015 at 10:00 AM, Johnny Billquist <bqt at> wrote:
>> The working 150MB RF30 is too small for a useful VMS system although
>> it would be a decent size if I set up the system as a PDP-11 with an
>> M7554-PB KDJ11-SB CPU instead of the VAX KA640.
> Be aware that no PDP-11 system knows about DSSI. There is one Qbus DSSI
> controller that looks like a simple MSCP controller, and that one should
> work fine. Any that exposes more of DSSI will be a non-starter with a
> PDP-11.

Yep, I have at least a couple of M7769 KFQSA DSSI controllers which
present a standard MSCP interface to the host.

More information about the cctalk mailing list