Description

This is the 138 page User’s Manual that goes with the General Computer Corporation HyperDrive upgrade for your Macintosh 128k or 512k. A HyperDrive adds an internal hard drive of 20MB, controller board, and fan. Unfortunately we don’t have the hardware that goes with the manual. This particular manual has a bit of writing on the front cover but is in good overall condition.

Includes the Sept 6, 1985 HyperDrive Update addendum