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SOFT5 generates Output connected to Output Error | Apple II+ #121

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baldengineer opened this issue Dec 15, 2023 · 1 comment
Closed

SOFT5 generates Output connected to Output Error | Apple II+ #121

baldengineer opened this issue Dec 15, 2023 · 1 comment
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Apple Tags for Apple Computers ERC Explanation Extended explainers for ERC

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@baldengineer
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A2C and A2D are NAND gates. Their inputs are tied to GND which forces their outputs HIGH. The Apple II+ schematic uses these unused gates (of A2) to pull-up the SOFT5 signal.
@baldengineer baldengineer added the Apple Tags for Apple Computers label Dec 15, 2023
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Setting ERC to exclude this violation since it was done on purpose.

@baldengineer baldengineer added the ERC Explanation Extended explainers for ERC label Dec 15, 2023
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