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Andrew Makousky 2cae046d13 Add a few more helpful links. 2021-04-03 16:57:55 -05:00
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.gitignore Initial commit 2020-08-06 18:06:49 -05:00
Makefile Initial commit 2020-08-06 18:06:49 -05:00
README.md Add a few more helpful links. 2021-04-03 16:57:55 -05:00
get_scans.sh Link to retrace in deeper README. 2020-08-06 18:12:33 -05:00
resize-mlb-scan.sh Initial commit 2020-08-06 18:06:49 -05:00
retrace_se_mlb_p1.svg Fix notes section after physical board testing. 2021-03-31 17:53:08 -05:00

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

PLEASE NOTE: Here is a link to the Macintosh 512k schematics, very useful for filling in the missing details.

20210101/https://www.folklore.org/images/Macintosh/schematic.jpg

Here's a link to some redrawn Macintosh 128k schematics.

20210403/https://kiramek.com/21test95/EarlyMacSchematics.pdf

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, the RAM SIMMs, and the PDS slot have 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 right 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.