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A comment on Acer Travelmate 4150 retrofitting to Raspberry Pi Laptop, Part 1. Parent comment

Re:Acer Travelmate 4150 retrofitting to Raspberry Pi Laptop,... by rzzzt on Monday March 27, 2017 @03:54PM (#13971108)
A mapping for the keyboard matrix can be "discovered" by pressing all keys in sequence. There are lots of AVR-based projects that emulate an USB HID for a custom keyboard matrix or other input; for an example, see [1][2].

[1] https://deskthority.net/wiki/Easy_AVR_USB_Keyboard_Firmware

[2] https://geekhack.org/index.php?topic=51252.0

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