On Thu, Nov 7, 2019 at 6:36 PM Jules Richardson via cctech <[email protected]> wrote: > > On 11/6/19 12:16 PM, David Coolbear via cctech wrote: > > M5976-AA KZQSA SCSI Controller Q > > Hmm, I could sure use one of those... > > I bought a bunch of QBus boards from my recycler quite some time ago, but > the systems that they'd been pulled from were run with SMD drives. Finding > a working SMD drive is something of a challenge, but SCSI at least opens up > possibilities of emulated storage (or real spinning rust, I may still have > a suitable drive or two, albeit currently on the other side of the Atlantic)
An M5976 KZQSA is not an MSCP compatible controller. If I remember correctly an M7626 KA660 VAX 4000-200 or better CPU is necessary to boot from it, and the only OS that supports it is VMS, and only SCSI CD-ROM drives are officially supported. I have never tried to boot VMS from a SCSI hard drive attached to an M5976 KZQSA, or tried to access a SCSI hard drive attached to an M5976 KZQSA after booting VMS from a different drive. I have only used them for installing VMS from a CD-ROM on a VAX 4000, or for installing layered products from a CD-ROM on any Q-Bus VAX after VMS is already installed. For that limited purpose they work well.
