28 Apr
2004
28 Apr
'04
5:22 p.m.
The 1541, Commodore's disk drive for the C-64, was
serial, but it was
sync serial based on bit-banging the I/O port at $0000/$0001.
No, no -- the IEC serial bus goes through the CIAs. The *cassette* is done
by bitbanging $0000/1.
It was
not a UART-friendly speed like the Atari drives were. The capacity was
the same as the older IEEE-488 4040 - about 170K (the drive processor
varied the bit rate amongst 4 zones, the lowest of which was identical
to the Apple II drives, packing between 17 and 22? sectors per track,
depending on the track).
Hai. :)
--
---------------------------------- personal: http://www.armory.com/~spectre/ --
Cameron Kaiser, Floodgap Systems Ltd * So. Calif., USA * ckaiser(a)floodgap.com
-- "My inner geek can beat up your inner geek." -------------------------------