12 May
2001
12 May
'01
1:31 p.m.
I didn't know it was practical to use mass storage devices under VMS without
using the MSCP. Gee ... I didn't think I'd ever learn anything more about DEC
machines ... <cringe> ... I really didn't particularly want to. The DRV-11WA
is
the model I used to hook an E3A diagnostic channel to an MV-II ... an ugly
experience, though not DEC's fault. It's too bad the PC folks didn't think of
a
way to hook an external device to the PC internals without direct access to the
bus the way this board does things. That allows you to aviod the "broken" I/O
device from making the system "broken" as well. I still have the doc's for
that
I/O board around somewhere.
Dick
----- Original Message -----
From: "Tony Duell" <ard(a)p850ug1.demon.co.uk>
To: <classiccmp(a)classiccmp.org>
Sent: Friday, May 11, 2001 12:16 PM
Subject: Re: Docs for DRV-11?
support
How will the DRV-11 help you hook into MSCP? It's a good and VERY flexible
Who said anything about MSCP. I assumed he was going to make a
hardware-compatible SCSI interface, and then write a special driver for
whatever OS he's running to set the lines to the appropriate states in
the right sequence. No reason why that wouldn't work -- plenty of the
older DEC disk drives weren't MSCP devices.
> card, but not intended for use as a file device. It does, of course, DMA.
Some DR(V)-11 versions support DMA (the -W does, and certainly the DR11-B
does -- is there a Qbus version of that?). Others don't.
-tony