Subject: Re: my latest haul (and QBus questions)
To: Chuck McManis <>
From: Clint Wolff \(VAX collector\) <>
List: port-vax
Date: 07/22/2001 21:47:50
The CQD-xxx boards can be disk only (/M), tape only (/T), or
disk & tape (/TM). There are different PALs onboard to do the
address decoding differently, but I think they are the same
other than that.


On Sat, 21 Jul 2001, Chuck McManis wrote:

> At 12:20 AM 7/22/01 -0400, Lord Isildur wrote:
> >i meant that, those boards can only do either tape or disk, but not both
> >at once, and i consider disk more useful than tape if i only can have
> >one of them.
> Hmm, well the CQD-223/TM manual seems to disagree with this statement. It 
> says CQD-223/423 /TM supports disks and tape simultaneously. (And I'm using 
> one that way on a 3600 that has three WREN drives and a 8MM deck.
> Now the CQD-200 wouldn't support both, but the 223, 423, and 443 all do. 
> Pulling W6-5, W6-6, and W6-7 out will disable tape support.
> As for the CD showing up as a tape, connect the terminal to the MMJ on the 
> SCSI card and tell it to reconfigure the card, do a reset. Then use option 
> D to see what devices it sees on the bus.
> --Chuck