DEC RXV21 with 5.25 floppy

From: jkunz_at_unixag-kl.fh-kl.de <(jkunz_at_unixag-kl.fh-kl.de)>
Date: Sun May 27 17:01:27 2001

On 27 May, Pete Turnbull wrote:

> Unless what you have is a Plessey or General Robotics RXV21 (GXV21?)
> which connects to 8" that have an SA800/SA850 interface.
"MXV21" from "MDA" (Micro Developement Associates) is one card, the
other is "MXV22" from "MTI" (Micro Technology Inc.) There is a lot of
AM29xx stuff on them...

> That, however, is a very different animal.
Sorry that I didn't wrote this in my first mail. I did not knew that the
DEC RXV21 / RX02 is that different.

> Well, if you have a real RX02, it can "reformat" RX01 disks.
[...]
This is weird. Typical DEC. ;-)

> You could use a PC to format a disk so it looked like a single-density 8"
> disk laid out the same way as an RX01 disk. To do that, you'd need a
> suitable drive, and controller that can handle 250kHz data in FM
> (single-density).
This means that all I need is to format a 5,25" SD floppy with 77
tracks, 128 bytes per sector, and 26 sectors and it will work at least
as RX01?

> Your RQDX controllers certainly can't do it.
Even with xxdp? Just dding the xxdp image with the VAX and using it on
the 11/73 would be easy. I have only one PC that is in working order
(my server), but the floppy interface on this machine is broken...
-- 
tsch??,
         Jochen
Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/
Received on Sun May 27 2001 - 17:01:27 BST

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