Re: UniDOS file copier

["Charlie" <charlied@NOSPAMbboard.com>]

"Jeff Blakeney" <CUTjblakeney@sympatico.ca> wrote in message
3cc97163.10608099@news1.sympatico.ca">news:3cc97163.10608099@news1.sympatico.ca...

> >There was another OS written by Bob Sander-Cederlof (author of the S-C
> >Assembler) that worked on 3.5 inch disks. It used a patched FID for file
> >copying, but (and here my memory may be failing me) I think he used Drive
1
> >to access the first 400k and Drive 2 to access the second 400k.  UniDOS
uses
> >Drive 1 for the first 400k and Drive 3 for the second 400k on an 800k
disk.
> >Drive 2 and Drive 4 seem to be active but unused in an 800k disk.
>
> I remember trying that DOS at some point as well.  Drive 2 and drive 4
> were set up as the two 400K "partitions" on a second 3.5" drive if you
> had two 3.5" drives hooked up.
>
> I didn't much like that way of dealing with it at the time as I only
> had a single 3.5" drive and most software wouldn't let you put 3 or 4
> in as drive numbers.

Yes, I believe that is the problem when using Bob Sander-Cederlof's patched
FID.  If I remember correctly it only allowed drives 1 and 2.

> Just off the top of my head I can think of 3 DOS 3.3 clones that I
> believe allowed using 3.5" disks as multiple 400K drives:  UniDOS,
> AmDOS and OzDOS.  I never really used any of them, just tried them
> out.

As I mentioned there was also one by Bob Sander-Cederlof (I don't know if it
even had a name) and I have read there was one by Glen Bredon (Master DOS
maybe?).

Charlie