DosFox on Nostr: This is sort of amusing. To get my OSHintosh (open source Macintosh, design is on ...
This is sort of amusing. To get my OSHintosh (open source Macintosh, design is on GitHub) running, one mod that I had to do was to pull up the address lines A9, A10, A11 and A12.
The pull ups were missing on the original Macintosh 128K schematics, but were present on the Macintosh Plus schematics.
As I was working on my 128K yesterday, I spotted this interesting bodge on the logic board.
A 2.2k resistor pack with only four resistors connected to pins on the VIA.
Pins A9, A10, A11 and A12.
I had actually managed to implement the exact same mistake as the original Macintosh, which required a factory bodge!
Published at
2026-07-14 17:35:29 UTCEvent JSON
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"content": "This is sort of amusing. To get my OSHintosh (open source Macintosh, design is on GitHub) running, one mod that I had to do was to pull up the address lines A9, A10, A11 and A12. \n\nThe pull ups were missing on the original Macintosh 128K schematics, but were present on the Macintosh Plus schematics.\n\nAs I was working on my 128K yesterday, I spotted this interesting bodge on the logic board.\n\nA 2.2k resistor pack with only four resistors connected to pins on the VIA.\n\nPins A9, A10, A11 and A12. \n\nI had actually managed to implement the exact same mistake as the original Macintosh, which required a factory bodge!\nhttps://media.tech.lgbt/media_attachments/files/116/919/514/098/939/485/original/f4cba5569d988bdd.jpg\n",
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