IIgs using hard disk 20

From: r. 'bear' stricklin <red_at_bears.org>
Date: Tue Oct 16 12:08:38 2001

On Tue, 16 Oct 2001, Douglas Quebbeman wrote:

> > BUT... predating that was a "Macintosh Hard Disk 20" that was not scsi.
> In spite of the now long-extant senility, I seem to recall that these
> interfaces through the serial port, not the floppy port.

Nope, the Apple Macintosh Hard Disk 20 most certainly plugs into the
floppy port. The trick is, the floppy port is essentially a 500 kbit/sec
serial interface.

Supposedly the HD20 INIT contains code to patch the 512k ROMs to allow the
use of an 800k floppy disk drive, as well as the code to use the HD20
itself. I need to fix some cold solder joints in my 512k before I can do
any real testing of this, though.

Received on Tue Oct 16 2001 - 12:08:38 BST

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