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• 09:28, 17 August 2023 Asie talk contribs created page Keypad (Created page with "The WonderSwan SoC features a 4 by 3 keypad matrix. == Scanning == Scanning is done via writing to and reading from port $B5. <pre> 7 bit 0 ---- ---- .iii oooo ||| ++++- Output rows (0-3) +++------ Input rows (4-6) </pre> The standard procedure is to read rows 4, 5 and 6 in order, shifting their values into one twelve-bit mask like so: <pre> 15 bit 0 ---- ---- ---- ---- .... 4444 5555 6666 </pre> Typical keypad scanning implementations introduce a d...")