Apple GCR

From: Eric Smith <eric_at_brouhaha.com>
Date: Wed Apr 7 21:17:15 1999

"Richard Erlacher" <edick_at_idcomm.com> wrote:
> This is one of APPLE & wierd Woz's patents. It's in almost every well
> equipped electrical engineering library.

The patent describes the general design and operation of the controller,
and how the "bit-slip" marks are used for synchronization. But it does
not describe the GCR format. Apparently early in development Woz was only
using standard FM encoding. AFAIK no version of Apple DOS using FM encoding
for the data field was ever released.
Received on Wed Apr 07 1999 - 21:17:15 BST