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...and IBM PC RTC chip (Motorola MC146818) cargo-culted that format from HP98035 clock module. That latter was literally a wrist-watch chip (TI AC5954N), surrou
by nousermane 5y ago
...and IBM PC RTC chip (Motorola MC146818) cargo-culted that format from HP98035 clock module. That latter was literally a wrist-watch chip (TI AC5954N), surrounded by logic/microcontroller that programmatically "pressed" buttons and "read back" display digits. CuriousMark did a video about it: https://www.youtube.com/watch?v=pr6HTiWrMmk https://www.youtube.com/watch?v=pr6HTiWrMmk