28 Apr
2004
28 Apr
'04
2:13 p.m.
On Wed, Apr 28, 2004 at 02:08:31PM -0400, Roger Merchberger wrote:
Game machine? Hardly... the Commodore & Atari were
*much* better with games
than the CoCo ever was. Floppy drives? RS drives were the best available
for that class of market at the time.
Machine Interface Storage
Commodore 19200bps ser. 120K? thereabouts, please correct me.
Atari 19200bps ser. 88K (single) 120K (enhanced)
CoCo 250000bps par. 156K (standard)
720K (OS-9, stock controller)
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. 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).
-ethan
--
Ethan Dicks, A-130-S Current South Pole Weather at 29-Apr-2004 02:00 Z
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Ethan.Dicks(a)amanda.spole.gov http://penguincentral.com/penguincentral.html