Eric Smith wrote:
I think you want _TRS-80 Disk and Other Mysteries_.
That was one of
the Mysteries books I didn't have, but ISTR that Al turned up a copy
recently.
No, that only covers Model I TRSDOS 2.x and NEWDOS 2.1. Sellam asked
about TRSDOS 1.3, which I have to assume means Model III TRSDOS.
Each track had 10 sectors. They were allocated to
files in groups of
five, which were called granules or grans. There's a Granule
Allocation Table (GAT) which I think was basically an allocation
bitmap.
Model I TRSDOS (and single density disks on all TRSDOS-like DOSes that
support single density) uses this format.
--
Tim Mann tim(a)tim-mann.org
http://www.tim-mann.org/