9 Oct
2005
9 Oct
'05
11:42 a.m.
On Sat, 8 Oct 2005, Chuck Guzis wrote:
The big weakness in the Apple II disk was the lack of
really good error
checking. A simple one-byte arithmetic checksum was used in lieu of a
CRC and I've personally experienced corrupted data flying by without
being diagnosed.
This is over-stated quite grandly. The Apple ][ disk system was
extremely reliable. And it still is. My 20 year old disks still read and
write just fine.
If you're looking for a good no-nonsense book on
the innards of the IIe,
try to find Jim Sather's book "Understanding the Apple IIe" (Quality
Software). Long OOP, it's one of the better references.
It's a very hard book to find, but worth it if you do.
--
Sellam Ismail Vintage Computer Festival
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