Apple II Technical Note UniDisk 3.5 5: Architectural Differences Between 3.5" Drives
Apple II Technical Note UniDisk 3.5 #5, Architectural Differences Between 3.5" Drives, is a three-page Apple Developer Technical Support note written by Cameron Birse and Mike Askins (October 1986) and revised by Matt Deatherage (November 1988).
Contents
[edit | edit source]It explains the difference between the intelligent Apple UniDisk 3.5 and the Apple 3.5 Drive, which has no controller of its own: the SmartPort device type and subtype bytes, where the IWM registers sit, and the speed of code downloaded to the UniDisk controller.
What this document does not contain
[edit | edit source]A programming note: no schematics or service procedures.
Pages that cite this document
[edit | edit source]- Apple UniDisk 3.5: cites pp. 1-2
Download: Apple II Technical Note UniDisk 3.5 5 Architectural Differences.pdf