ebay: Q-Bus SCSI adapter

On Sat, Oct 24, 2009 at 4:59 AM, Richard <legalize at xmission.com> wrote: Slightly interesting that the KZQSA went for slightly more than the CMD CQD-223/T that it was listed with at the same time. Has anyone verified that a CQD-220/T or CQD-223/T can be transmorgified into a more useful CQD-220/TM or CQD-223/TM just by replacing the CSR decode chip? I think I have correctly reverse engineered the TM version P22015A PEEL173P CSR decode chip. I just now programmed a replacement PALC22V10 for a CQD-223/M and so far it appears that it is functioning correctly as a CQD-223/TM. (I also replaced the EPROMs with ones cloned from a TM.) I haven't yet tried booting from a SCSI tape and installing to a SCSI disk to make sure it is completely functional as a TM. I haven't tried this experiment yet with a CQD-223/T to CQD-223/TM conversion.