29 Jan
2012
29 Jan
'12
8:44 a.m.
Chris M wrote:
________________________________ From: Chuck Guzis <cclist at sydex.com>
I guess you're right. I'll start by explaining which side of a floppy
is up--not so easy with users of early Altos boxes...
C: There is no "up" w/double sided disks on a Commie 64 either. You
nibble notch that bad boy, then flip it over and keep recording. I still
have my original nibble notcher too. Suncom I think.
... unlike Acorn, where the DFS firmware would treat separate disk surfaces
as completely different logical drives:
logical drive 0 = physical drive 1, top surface
logical drive 1 = physical drive 2, top surface
logical drive 2 = physical drive 1, bottom surface
logical drive 3 = physical drive 2, bottom surface
Access to logical drives 1 and 3 would give an error in a single-drive system.
It'd be interesting to know how common that kind of setup was. Most floppy
image formats seem to expect there to just be one 'thing' on a disc (i.e.
the floppy is either single-sided, or double-sided with the filesystem
spanning the whole disk), and metadata can only be attached to the image as
a whole.
cheers
Jules