6809 (was: Anybody ever use Aztec C for APPLEII?)

From: Cameron Kaiser <spectre_at_floodgap.com>
Date: Thu Apr 29 00:22:18 2004

> 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_at_floodgap.com
-- "My inner geek can beat up your inner geek." -------------------------------
Received on Thu Apr 29 2004 - 00:22:18 BST

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