7 Jan
2013
7 Jan
'13
8:22 a.m.
From: Chris Elmquist <chrise at pobox.com>
I think you will find that the C1 used an async UART
(MC6850) and a PIA
(MC6820) to interface to the floppy drives.?
Actually, the ACIA was used in synchronous mode, and the MFM encoding was derived from
both the clock and data signals.
Dave