[sebhc] Hard-sectored disks
dave06a at dunfield.com
Fri Feb 9 06:59:45 CST 2007
> >the Apple II used 16 hole hard sectored disks. I presume it would at least
> >be a major undertaking to get these to work on Heath hard sectored setups.
> >At a minimum it would seem to require a rewrite of the H17 ROM.
> It did? I always thought Apple II disks were soft sector, though the recorded data format was
> unusual (not FM or MFM, but rather pulse width encoding).
The Apple-II was soft-sector, and didn't use the sector hole - that is why you could just
cut the WP notch and flip a diskette over without having to punch the index hole.
> Northstar computers used 16-hole hard sectored disks.
No, NorthStar uses 10-sector diskettes (physically the same as H17 diskettes, although
the actual format is different)
dave06a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
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