File:Apple NuBus Graphics Card Theory of Operations (1986).pdf

NuBus Graphics Card Theory of Operations by Toby Farrand, Advanced Development Group, Computer Graphics Lab, Apple Computer, dated 12 August 1986 and marked "Apple Confidential". A 63-page engineering document for the DVT version (1.0) of the NuBus Graphics Card built around the TFB frame buffer controller, the design that became the Macintosh II Video Card. It covers features and cost, the memory map and TFB register values, the NuBus interface, timing generation, frame buffer, video output, debugging, final board features and layout, followed by the schematics, PAL equations, timing diagrams and the Brooktree Bt453 data sheet. Described on Apple NuBus Graphics Card Theory of Operations (1986).

bitsavers.org, pdf/apple/nubus/apple/TFB/Nubus_Graphics_Card_Theory_of_Operation_19860812.pdf (retrieved 2026-10-04). Scan with an OCR text layer.

Toby Farrand, Apple Computer, Inc.

Copyright Apple Computer, Inc. Not freely licensed; hosted for preservation and repair reference, with the source cited.