[Coco] hybrid CoCo-CP/M disk

[Robert Gault]

Willard Goosey wrote:
><snip>
> There is some wasted space, as group 0x4a starts on track 17, sector
> 17, and continues for six sectors into track 18, but that's not my
> fault, 8 sector groups just don't come out even on 18 sector/track
> disks.
><snip>
> 
> Willard

Not sure what you mean in the above by "group 0x4a". If that's gran $4a, 
it would be at track 38 sector 1. Whichever gran value it is (assuming 
it is a gran value) there are 9 sectors per gran and two grans per track 
on a Coco disk. Track 17, the Coco directory track, is not included in 
the gran numbering nor does it appear in the allocation table, T17S2.