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Re: Using Mac 20 meg HD on A2 drive port???

Subject: Re: Using Mac 20 meg HD on A2 drive port???
From: Patrick Schaefer <pa.schaefer@fz-juelich.de>
Date: 1997/11/10
Newsgroups: comp.sys.apple2
Organization: Forschungszentrum Juelich GmbH
References: <63stbt$klc$1@lynx.unm.edu>
Reply-to: pa.schaefer@fz-juelich.de

stephen e buggie wrote:

> Could a creative programmer write ROM code so that it could be used as an
> external hard drive for IIc, similar to the Chinook external hard drive
> for IIc?  The IIc upgrade ROM allows the IIc to use an 800K external
> floppy, so could a ROM be created to allow use of the Mac 20 meg external
> hard drive?  (Note: the db-19 hard drive is NOT scsi.)

The old MAC has an IWM chip, the same floppy controller is on the IIc
board and on the UniDisk card. With suitable software, it should be
possible to run a HD20 (not HD20SC) on these systems.

The HD20 will definitely not work with a standard Disk ][ (or DuoDisk)
controller, because it doesn't support the IWM serial interface
protocol.

Patrick

References:
- Using Mac 20 meg HD on A2 drive port???
  - From: buggie@argo.unm.edu (stephen e buggie)

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