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Add rgeorge/model_c keyboard #26341

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27367e2
Add ibm/model_m keyboard
Jul 18, 2026
6b086e6
Fix capslayer readme: add missing trailing newline
Jul 19, 2026
8051308
Rename keymaps to rgeorge and add README with PCB hardware link
Jul 19, 2026
1690888
Address remaining review feedback: remove redundant SPI pins, fix VID…
Jul 19, 2026
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44 changes: 44 additions & 0 deletions keyboards/ibm/model_m/config.h
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Original file line number Diff line number Diff line change
@@ -0,0 +1,44 @@
/*
Copyright 2024 Richard George

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/

#pragma once

/*
* Arduino Pro Micro Pin Mapping
* ---------------------------
* Physical pin locations preserved from original design:
* D5 (Arduino Pin 5) -> PC6 -> QMK: C6 (CS1 - Expander A, address 0x01, long 16-pin connector, columns)
* D6 (Arduino Pin 6) -> PD7 -> QMK: D7 (CS2 - Expander B, address 0x00, short 8-pin connector, rows)
* D14 (Arduino Pin 14) -> PB3 -> QMK: B3 (MISO)
* D15 (Arduino Pin 15) -> PB1 -> QMK: B1 (SCK)
* D16 (Arduino Pin 16) -> PB2 -> QMK: B2 (MOSI)
*
* MCP23S17 Configuration:
* - Expander A (CS1): Connected to long 16-pin connector, handles columns, address 0x01
* GPA0->pin1, GPA1->pin2, ..., GPA7->pin8, GPB0->pin9, ..., GPB7->pin16
* - Expander B (CS2): Connected to short 8-pin connector, handles rows, address 0x00
* GPA0->pin1, GPA1->pin2, ..., GPA7->pin8
*/

/* key matrix size */
#define MATRIX_ROWS 8
#define MATRIX_COLS 16

/* SPI for MCP23S17 - mapped to Arduino Pro Micro physical pins */
#define SPI_DRIVER SPID1 /* Using hardware SPI on pins D14-D16 */
#define MCP23S17_CS1_PIN C6 /* D5 -> PC6 (CS1 - Expander A for columns) */
#define MCP23S17_CS2_PIN D7 /* D6 -> PD7 (CS2 - Expander B for rows) */
Comment on lines +43 to +44

@zvecr zvecr Jul 19, 2026

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Doesnt really add value as the only file thats ever going to use it is the keyboards matrix.c

Suggested change
#define MCP23S17_CS1_PIN C6 /* D5 -> PC6 (CS1 - Expander A for columns) */
#define MCP23S17_CS2_PIN D7 /* D6 -> PD7 (CS2 - Expander B for rows) */

143 changes: 143 additions & 0 deletions keyboards/ibm/model_m/keyboard.json
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{
"manufacturer": "rgeorge",
"keyboard_name": "model_m",
"maintainer": "rgeorge",
"bootmagic": {
"matrix": [0, 5]
},
"development_board": "promicro",
"features": {
"bootmagic": true,
"command": true,
"extrakey": true,
"mousekey": true
},
"indicators": {
"caps_lock": "E6",
"num_lock": "B5",
"on_state": 0,
"scroll_lock": "B4"
},
"matrix_pins": {
"ghost": true
},
"qmk": {
"locking": {
"enabled": true,
"resync": true
}
},
"usb": {
"device_version": "0.0.1",
"pid": "0x0001",
"vid": "0x5247"
},
"layouts": {
"LAYOUT": {
"layout": [
{"label": "Esc", "matrix": [0, 5], "x": 0, "y": 0},
{"label": "F1", "matrix": [2, 4], "x": 2, "y": 0},
{"label": "F2", "matrix": [2, 3], "x": 3, "y": 0},
{"label": "F3", "matrix": [1, 3], "x": 4, "y": 0},
{"label": "F4", "matrix": [0, 3], "x": 5, "y": 0},
{"label": "F5", "matrix": [0, 1], "x": 6.5, "y": 0},
{"label": "F6", "matrix": [0, 8], "x": 7.5, "y": 0},
{"label": "F7", "matrix": [1, 9], "x": 8.5, "y": 0},
{"label": "F8", "matrix": [2, 9], "x": 9.5, "y": 0},
{"label": "F9", "matrix": [2, 1], "x": 11, "y": 0},
{"label": "F10", "matrix": [3, 1], "x": 12, "y": 0},
{"label": "F11", "matrix": [3, 11], "x": 13, "y": 0},
{"label": "F12", "matrix": [3, 12], "x": 14, "y": 0},
{"label": "Print Screen", "matrix": [3, 15], "x": 15.5, "y": 0},
{"label": "Scroll Lock", "matrix": [4, 15], "x": 16.5, "y": 0},
{"label": "Pause", "matrix": [6, 14], "x": 17.5, "y": 0},
{"label": "`", "matrix": [2, 5], "x": 0, "y": 1.5},
{"label": "1", "matrix": [3, 5], "x": 1, "y": 1.5},
{"label": "2", "matrix": [3, 4], "x": 2, "y": 1.5},
{"label": "3", "matrix": [3, 3], "x": 3, "y": 1.5},
{"label": "4", "matrix": [3, 2], "x": 4, "y": 1.5},
{"label": "5", "matrix": [2, 2], "x": 5, "y": 1.5},
{"label": "6", "matrix": [2, 0], "x": 6, "y": 1.5},
{"label": "7", "matrix": [3, 0], "x": 7, "y": 1.5},
{"label": "8", "matrix": [3, 8], "x": 8, "y": 1.5},
{"label": "9", "matrix": [3, 9], "x": 9, "y": 1.5},
{"label": "0", "matrix": [3, 10], "x": 10, "y": 1.5},
{"label": "-", "matrix": [2, 10], "x": 11, "y": 1.5},
{"label": "=", "matrix": [2, 8], "x": 12, "y": 1.5},
{"label": "Backspace", "matrix": [1, 1], "x": 14, "y": 1.5, "w": 2},
{"label": "Insert", "matrix": [2, 12], "x": 15.5, "y": 1.5},
{"label": "Home", "matrix": [2, 14], "x": 16.5, "y": 1.5},
{"label": "Page Up", "matrix": [2, 13], "x": 17.5, "y": 1.5},
{"label": "Num Lock", "matrix": [6, 11], "x": 19, "y": 1.5},
{"label": "/", "matrix": [6, 12], "x": 20, "y": 1.5},
{"label": "*", "matrix": [6, 13], "x": 21, "y": 1.5},
{"label": "-", "matrix": [7, 13], "x": 22, "y": 1.5},
{"label": "Tab", "matrix": [1, 5], "x": 0, "y": 2.5, "w": 1.5},
{"label": "Q", "matrix": [4, 5], "x": 1.5, "y": 2.5},
{"label": "W", "matrix": [4, 4], "x": 2.5, "y": 2.5},
{"label": "E", "matrix": [4, 3], "x": 3.5, "y": 2.5},
{"label": "R", "matrix": [4, 2], "x": 4.5, "y": 2.5},
{"label": "T", "matrix": [1, 2], "x": 5.5, "y": 2.5},
{"label": "Y", "matrix": [1, 0], "x": 6.5, "y": 2.5},
{"label": "U", "matrix": [4, 0], "x": 7.5, "y": 2.5},
{"label": "I", "matrix": [4, 8], "x": 8.5, "y": 2.5},
{"label": "O", "matrix": [4, 9], "x": 9.5, "y": 2.5},
{"label": "P", "matrix": [4, 10], "x": 10.5, "y": 2.5},
{"label": "[", "matrix": [1, 10], "x": 11.5, "y": 2.5},
{"label": "]", "matrix": [1, 8], "x": 12.5, "y": 2.5},
{"label": "Enter", "matrix": [6, 1], "x": 13.5, "y": 2.5, "w": 1.5},
{"label": "Delete", "matrix": [2, 11], "x": 15.5, "y": 2.5},
{"label": "End", "matrix": [3, 14], "x": 16.5, "y": 2.5},
{"label": "Page Down", "matrix": [3, 13], "x": 17.5, "y": 2.5},
{"label": "7", "matrix": [4, 11], "x": 19, "y": 2.5},
{"label": "8", "matrix": [4, 12], "x": 20, "y": 2.5},
{"label": "9", "matrix": [4, 13], "x": 21, "y": 2.5},
{"label": "+", "matrix": [4, 14], "x": 22, "y": 2.5, "h": 2},
{"label": "Caps Lock", "matrix": [1, 4], "x": 0, "y": 3.5, "w": 1.25},
{"label": "A", "matrix": [5, 5], "x": 1.75, "y": 3.5},
{"label": "S", "matrix": [5, 4], "x": 2.75, "y": 3.5},
{"label": "D", "matrix": [5, 3], "x": 3.75, "y": 3.5},
{"label": "F", "matrix": [5, 2], "x": 4.75, "y": 3.5},
{"label": "G", "matrix": [0, 2], "x": 5.75, "y": 3.5},
{"label": "H", "matrix": [0, 0], "x": 6.75, "y": 3.5},
{"label": "J", "matrix": [5, 0], "x": 7.75, "y": 3.5},
{"label": "K", "matrix": [5, 8], "x": 8.75, "y": 3.5},
{"label": "L", "matrix": [5, 9], "x": 9.75, "y": 3.5},
{"label": ";", "matrix": [5, 10], "x": 10.75, "y": 3.5},
{"label": "'", "matrix": [0, 10], "x": 11.75, "y": 3.5},
{"label": "#", "matrix": [5, 1], "x": 12.75, "y": 3.5},
{"label": "4", "matrix": [1, 11], "x": 19, "y": 3.5},
{"label": "5", "matrix": [1, 12], "x": 20, "y": 3.5},
{"label": "6", "matrix": [1, 13], "x": 21, "y": 3.5},
{"label": "Shift", "matrix": [1, 6], "x": 0, "y": 4.5, "w": 1.25},
{"label": "\\", "matrix": [7, 4], "x": 1.25, "y": 4.5},
{"label": "Z", "matrix": [6, 5], "x": 2.25, "y": 4.5},
{"label": "X", "matrix": [6, 4], "x": 3.25, "y": 4.5},
{"label": "C", "matrix": [6, 3], "x": 4.25, "y": 4.5},
{"label": "V", "matrix": [6, 2], "x": 5.25, "y": 4.5},
{"label": "B", "matrix": [7, 2], "x": 6.25, "y": 4.5},
{"label": "N", "matrix": [7, 0], "x": 7.25, "y": 4.5},
{"label": "M", "matrix": [6, 0], "x": 8.25, "y": 4.5},
{"label": ",", "matrix": [6, 8], "x": 9.25, "y": 4.5},
{"label": ".", "matrix": [6, 9], "x": 10.25, "y": 4.5},
{"label": "/", "matrix": [7, 10], "x": 11.25, "y": 4.5},
{"label": "Shift", "matrix": [6, 6], "x": 12.25, "y": 4.5, "w": 2.75},
{"label": "Up", "matrix": [0, 14], "x": 16.5, "y": 4.5},
{"label": "1", "matrix": [5, 11], "x": 19, "y": 4.5},
{"label": "2", "matrix": [5, 12], "x": 20, "y": 4.5},
{"label": "3", "matrix": [5, 13], "x": 21, "y": 4.5},
{"label": "Enter", "matrix": [5, 14], "x": 22, "y": 4.5, "h": 2},
{"label": "Ctrl", "matrix": [2, 7], "x": 0, "y": 5.5, "w": 1.5},
{"label": "Alt", "matrix": [0, 15], "x": 2.5, "y": 5.5, "w": 1.5},
{"label": "Space", "matrix": [7, 1], "x": 4, "y": 5.5, "w": 7},
{"label": "AltGr", "matrix": [7, 15], "x": 11, "y": 5.5, "w": 1.5},
{"label": "Menu", "matrix": [6, 7], "x": 13.5, "y": 5.5, "w": 1.5},
{"label": "Left", "matrix": [7, 14], "x": 15.5, "y": 5.5},
{"label": "Down", "matrix": [7, 11], "x": 16.5, "y": 5.5},
{"label": "Right", "matrix": [7, 12], "x": 17.5, "y": 5.5},
{"label": "0", "matrix": [0, 12], "x": 19, "y": 5.5, "w": 2},
{"label": ".", "matrix": [0, 13], "x": 21, "y": 5.5}
]
}
}
}
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