Re: Disk format

[david@uow.edu.au (David Wilson)]

"Aurelien Mere" <amere@multimania.com> writes:
>Does anybody know the disk format of 3"5 apple II disks ?
>I mean : number of sectors, tracks, bytes/sectors, heads, etc...

It is the same (well almost) as the Mac:

80 tracks
2 heads
512 bytes/sector (Mac has extra 12 bytes for flags, Apple // has zeros)
Variable number of sectors per track

For a single sided disk:

        Tracks  Sectors/Track   Sector #s
        0-15            12        0-191
        16-31           11      192-367
        32-47           10      368-527
        48-63           9       528-671
        64-79           8       672-799

I assume that for a double sided disk you just double the sector numbers.

See Inside Macintosh Volume II, chapter 7.
--
David Wilson  School of IT & CS, Uni of Wollongong, Australia  david@uow.edu.au