7 May
2007
7 May
'07
3:43 a.m.
dwight elvey wrote:
I'd have to reread the documents on the SA drives
but there
was something like the dash number that made the difference.
The 800/801 was with and without data/clock separator ( may
have these backwards ).
You're absolutely correct (according to the Shugart SA800 OEM manual on
Bitsavers) - the SA800 only provides the Index pulse, the SA801 also provides
the Sector pulse, and splits the sector pulses from the index pulses.
Strange that the SA800 only provides an index pulse once per revolution - I
guess it's intended for soft-sector discs. Given that there's no indexing on
the hub like there is on 3.5" drives, the SA800 would probably output one
index pulse every time an index hole was detected - if you used soft-sector
discs that would be one pulse per rev, or 32+1 pulses if you used 32-sector
hard-sector discs.
All adds to the fun, I guess :)
Thanks.
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