>Pat Finnegan wrote:
> Data Systems Design Model 880-D8. It has a DS Shugart 8" floppy drive in
> it (which I intend to use to fix my Altos 8000) and a SA-1000 interface 8"
>
> It has a Shugart model 513 drive. How likely am I to be able to replace a
> Shugart 801 drive with it? I know the 513 is DS and the 801 is SS, but
> that shouldn't matter, right? It seems to want to conflict with the
> other 513 drive in my ACS-8000, and also doesn't want to light up its
> 'selected' LED at boot when I jumper it to DS0. Is there some sort
> of jumpering on the drive I need to change to get it to work with the
> ACS-8000, do I need to rewire the cable, or it it easier than it
> seems? Does anyone have a pinout for the connector?
Jerome Fine replies:
The only floppy drive that I am familiar with from Data Systems Design
was in the DSD 880/30 unit. This was for the Qbus and included a
dual height card as the interface to the Qbus. Inside the box was an
8" hard drive and an 8" floppy drive.
The floppy drive was RX02 compatible when used with the associated
boards. In addition, the drive was able to sense and use double-sided
media or what DEC would have called RX03.
Note that for 8" floppy media (as opposed to 5 1/4" floppy media for
which the single and double sided media were identical), the location
of the index hole for single sided media was about an inch away from
the location of the index hole for double sided media. Thus the jacket
for single sided media had holes on each side in a location hat was
very different (by the one inch shift) for double sided media. In addition,
the double sided drives allowed both single sided and double sided
operation - which meant that there were two light emitting diodes and
two light sensors in addition to the second head which could read
the second side.
Sincerely yours,
Jerome Fine
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Received on Fri Jun 21 2002 - 22:53:25 BST