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_at_amanda.spole.gov http://penguincentral.com/penguincentral.html
Received on Wed Apr 28 2004 - 21:13:04 BST