From: Eric Dittman <dittman(a)dittman.net>
 > > I'm trying to write some RX50 disk images
> > using Teledisk.  I can use 22DISK and PUTR
> > to format the floppies, but Teledisk will
> > not write to them.  I get an error that
> > the drive or controller is returning an
> > unsupported status.
>
> What happens if you format them as MS-DOS floppies, and then try to 
get
 > Teledisk to write to them?  I believe that is the
way Teledisk expects 
them
   to be. 
I'll try that and see. 
 
Dont bother.  MSdos formats as 9 sectors of 512bytes, RX50 format is 10
sectors of 512bytes.  Putr I think will do that as would some DEC
diagnostics.
RX50 format is:
    10 sectors, 512bytes
    96 TPI, 80 tracks single sided, double density (250kbs)
Allison