My local repo of qmk firmware.
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qmk_firmware/keyboards/converter/xt_usb
Joel Challis 11d49d00e7
Remove matrix_init_quantum/matrix_scan_quantum (#19806)
2 years ago
..
keymaps/default Remove legacy keycodes, part 5 (#18710) 3 years ago
config.h Remove usages of config_common.h from config.h files. (#19714) 2 years ago
info.json Migrate `MCU` and `BOOTLOADER` to data-driven (#19529) 2 years ago
matrix.c Remove matrix_init_quantum/matrix_scan_quantum (#19806) 2 years ago
readme.md
rules.mk Migrate `MCU` and `BOOTLOADER` to data-driven (#19529) 2 years ago
xt.h
xt_interrupt.c
xt_usb.c
xt_usb.h

readme.md

XT to USB keyboard converter

This is a port of TMK's converter/xt_usb to QMK.

This firmware converts XT keyboard protocol to USB.(It supports Scan Code Set 1.)

Connect Wires

  1. Connect Vcc and GND.
  2. Connect Clock and Data line. Clock is on PD1, Data on PD0 by default. And optionally you can use PB7 for Reset.(Compatible to Soarer's converter) To change pin configuration edit config.h.
  3. You need pull-up resistor. 1K-10K Ohm will be OK.

XT keyboard protocol resource

https://github.com/tmk/tmk_keyboard/wiki/IBM-PC-XT-Keyboard-Protocol