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Some RTCs do work with a simple counter like that. This calendar nonsense is basically cargo cult from the early IBM PC days. But hardware engineers rarely talk
by marcan_42 5y ago
Some RTCs do work with a simple counter like that. This calendar nonsense is basically cargo cult from the early IBM PC days. But hardware engineers rarely talk to software engineers, and these IP blocks were designed decades ago and people don't want to touch them...
- 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