macsehw/old_artifacts/schems/README.md

These are links to the official Apple Macintosh SE schematics.

Source website: https://museo.freaknet.org/gallery/apple/stuff/mac/andreas.kann/schemat.html

Unfortunately, there are no BOMARC schematics available for the Macintosh SE.

The Internet Archive also has a copy of purportedly the same Macintosh SE schematics scan.

https://archive.org/details/Macintosh68kSchematics

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Due to the illegiblity of the original Main Logic Board (MLB) page 1 scan, this repository also contains a retrace of the schematic, striving to be as faithful as possible to the original. The retrace was done by hand and careful eyeing in Inkscape, after doing some simple image processing on the input scan. A script that uses the ImageMagick convert command is included to reproduce the processing steps.

Notes related to the accuracy of the retrace.

• The pinouts of all integrated circuit components have been verified with second sources.

• The pinouts of the PDS slot and RAM SIMMs have not yet been verified with second sources.

• The resistor values have been checked to be consistent with the reference designators, but not all reference designators have been verified to be consistent with the placement on the printed circuit board.

• The schematic info blocks in the upper and lower left corners have been cross-checked with scans of other official Apple schematics to attempt to make them as faithful as possible to the original contents.

Notes on the source SVG file:

• The processed scan is linked as a hidden and locked image object. To view both the retrace and the original scan together, find the image object (possibly in the XML hierarchy) and make it visible. The image object is locked to make it easier to draw on top of.

• The specific sans-serif font I used on my system is DejaVu Sans. So long as your system sans-serif font has similar metrics, everything should work just fine, otherwise you can replace the font family name with DejaVu Sans.