yugo_m enhancement: include all available key positions (#16216)

* yugo_m enhancement to include all available key positions in matrix

10 files changed, 168 insertions, 28 deletions

diff --git a/keyboards/yugo_m/model_m_101/config.h b/keyboards/yugo_m/model_m_101/config.h
index 94861a7587..e17f8310b8 100644
--- a/keyboards/yugo_m/model_m_101/config.h
+++ b/keyboards/yugo_m/model_m_101/config.h
@@ -1,5 +1,6 @@
 /*
 Copyright 2020 Nidzo Tomic <tomicn8@hotmail.com>
+Copyright 2022 an_achronism <87213873+an-achronism@users.noreply.github.com>
 
 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
@@ -96,3 +97,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 //#define NO_ACTION_LAYER
 //#define NO_ACTION_TAPPING
 //#define NO_ACTION_ONESHOT
+
+/* redefine available (emulated) EEPROM as 4 kB rather than the default 1 kB to let VIA use more of the 8 kB of on-chip Flash of the STM32F303 to store 4 layers (since 4 layers * 8 rows * 16 columns * 2 = 1024 bytes but the default max available is 1023 bytes due to ATMEGA32U4 etc. only having 1 kB of EEPROM) */
+#define DYNAMIC_KEYMAP_EEPROM_MAX_ADDR 4095
diff --git a/keyboards/yugo_m/model_m_101/info.json b/keyboards/yugo_m/model_m_101/info.json
index ec978056d3..399307c2d0 100644
--- a/keyboards/yugo_m/model_m_101/info.json
+++ b/keyboards/yugo_m/model_m_101/info.json
@@ -1,10 +1,10 @@
 {
-    "keyboard_name": "IBM Model M 101/102",
+    "keyboard_name": "IBM Enhanced Keyboard",
     "url": "https://github.com/tomic1785/qmk_firmware/tree/stm32_model_m/keyboards/yugo_m/model_m_101",
     "maintainer": "Nidzo Tomic",
     "layouts": {
         "LAYOUT_all": {
-            "layout": [{"label":"Esc", "x":0, "y":0}, {"label":"F1", "x":2, "y":0}, {"label":"F2", "x":3, "y":0}, {"label":"F3", "x":4, "y":0}, {"label":"F4", "x":5, "y":0}, {"label":"F5", "x":6.5, "y":0}, {"label":"F6", "x":7.5, "y":0}, {"label":"F7", "x":8.5, "y":0}, {"label":"F8", "x":9.5, "y":0}, {"label":"F9", "x":11, "y":0}, {"label":"F10", "x":12, "y":0}, {"label":"F11", "x":13, "y":0}, {"label":"F12", "x":14, "y":0}, {"label":"PrtSc", "x":15.25, "y":0}, {"label":"Scroll Lock", "x":16.25, "y":0}, {"label":"Pause", "x":17.25, "y":0}, {"label":"~", "x":0, "y":1.5}, {"label":"!", "x":1, "y":1.5}, {"label":"@", "x":2, "y":1.5}, {"label":"#", "x":3, "y":1.5}, {"label":"$", "x":4, "y":1.5}, {"label":"%", "x":5, "y":1.5}, {"label":"^", "x":6, "y":1.5}, {"label":"&", "x":7, "y":1.5}, {"label":"*", "x":8, "y":1.5}, {"label":"(", "x":9, "y":1.5}, {"label":")", "x":10, "y":1.5}, {"label":"_", "x":11, "y":1.5}, {"label":"+", "x":12, "y":1.5}, {"label":"Backspace", "x":13, "y":1.5, "w":2}, {"label":"Insert", "x":15.25, "y":1.5}, {"label":"Home", "x":16.25, "y":1.5}, {"label":"PgUp", "x":17.25, "y":1.5}, {"label":"Num Lock", "x":18.5, "y":1.5}, {"label":"/", "x":19.5, "y":1.5}, {"label":"*", "x":20.5, "y":1.5}, {"label":"-", "x":21.5, "y":1.5}, {"label":"Tab", "x":0, "y":2.5, "w":1.5}, {"label":"Q", "x":1.5, "y":2.5}, {"label":"W", "x":2.5, "y":2.5}, {"label":"E", "x":3.5, "y":2.5}, {"label":"R", "x":4.5, "y":2.5}, {"label":"T", "x":5.5, "y":2.5}, {"label":"Y", "x":6.5, "y":2.5}, {"label":"U", "x":7.5, "y":2.5}, {"label":"I", "x":8.5, "y":2.5}, {"label":"O", "x":9.5, "y":2.5}, {"label":"P", "x":10.5, "y":2.5}, {"label":"{", "x":11.5, "y":2.5}, {"label":"}", "x":12.5, "y":2.5}, {"label":"|", "x":13.5, "y":2.5, "w":1.5}, {"label":"Delete", "x":15.25, "y":2.5}, {"label":"End", "x":16.25, "y":2.5}, {"label":"PgDn", "x":17.25, "y":2.5}, {"label":"7", "x":18.5, "y":2.5}, {"label":"8", "x":19.5, "y":2.5}, {"label":"9", "x":20.5, "y":2.5}, {"label":"+", "x":21.5, "y":2.5, "h":2}, {"label":"Caps Lock", "x":0, "y":3.5, "w":1.5}, {"label":"A", "x":1.75, "y":3.5}, {"label":"S", "x":2.75, "y":3.5}, {"label":"D", "x":3.75, "y":3.5}, {"label":"F", "x":4.75, "y":3.5}, {"label":"G", "x":5.75, "y":3.5}, {"label":"H", "x":6.75, "y":3.5}, {"label":"J", "x":7.75, "y":3.5}, {"label":"K", "x":8.75, "y":3.5}, {"label":"L", "x":9.75, "y":3.5}, {"label":":", "x":10.75, "y":3.5}, {"label":"\"", "x":11.75, "y":3.5}, {"label":"~", "x":12.75, "y":3.5}, {"label":"Enter", "x":13.75, "y":3.5, "w":1.25}, {"label":"4", "x":18.5, "y":3.5}, {"label":"5", "x":19.5, "y":3.5}, {"label":"6", "x":20.5, "y":3.5}, {"label":"Shift", "x":0, "y":4.5, "w":1.25}, {"label":"|", "x":1.25, "y":4.5}, {"label":"Z", "x":2.25, "y":4.5}, {"label":"X", "x":3.25, "y":4.5}, {"label":"C", "x":4.25, "y":4.5}, {"label":"V", "x":5.25, "y":4.5}, {"label":"B", "x":6.25, "y":4.5}, {"label":"N", "x":7.25, "y":4.5}, {"label":"M", "x":8.25, "y":4.5}, {"label":"<", "x":9.25, "y":4.5}, {"label":">", "x":10.25, "y":4.5}, {"label":"?", "x":11.25, "y":4.5}, {"label":"Shift", "x":12.25, "y":4.5, "w":2.75}, {"label":"\u2191", "x":16.25, "y":4.5}, {"label":"1", "x":18.5, "y":4.5}, {"label":"2", "x":19.5, "y":4.5}, {"label":"3", "x":20.5, "y":4.5}, {"label":"Enter", "x":21.5, "y":4.5, "h":2}, {"label":"Ctrl", "x":0, "y":5.5, "w":1.5}, {"label":"Alt", "x":2.5, "y":5.5, "w":1.5}, {"x":4, "y":5.5, "w":7}, {"label":"Alt", "x":11, "y":5.5, "w":1.5}, {"label":"Ctrl", "x":13.5, "y":5.5, "w":1.5}, {"label":"\u2190", "x":15.25, "y":5.5}, {"label":"\u2193", "x":16.25, "y":5.5}, {"label":"\u2192", "x":17.25, "y":5.5}, {"label":"0", "x":18.5, "y":5.5, "w":2}, {"label":".", "x":20.5, "y":5.5}]
+            "layout": [{"label":"Esc", "x":0, "y":0}, {"label":"F1", "x":2, "y":0}, {"label":"F2", "x":3, "y":0}, {"label":"F3", "x":4, "y":0}, {"label":"F4", "x":5, "y":0}, {"label":"F5", "x":6.5, "y":0}, {"label":"F6", "x":7.5, "y":0}, {"label":"F7", "x":8.5, "y":0}, {"label":"F8", "x":9.5, "y":0}, {"label":"F9", "x":11, "y":0}, {"label":"F10", "x":12, "y":0}, {"label":"F11", "x":13, "y":0}, {"label":"F12", "x":14, "y":0}, {"label":"Print Screen", "x":15.5, "y":0}, {"label":"Scroll Lock", "x":16.5, "y":0}, {"label":"Pause", "x":17.5, "y":0}, {"label":"\u00ac", "x":0, "y":1.5}, {"label":"!", "x":1, "y":1.5}, {"label":"\"", "x":2, "y":1.5}, {"label":"\u00a3", "x":3, "y":1.5}, {"label":"$", "x":4, "y":1.5}, {"label":"%", "x":5, "y":1.5}, {"label":"^", "x":6, "y":1.5}, {"label":"&", "x":7, "y":1.5}, {"label":"\uff0a", "x":8, "y":1.5}, {"label":"(", "x":9, "y":1.5}, {"label":")", "x":10, "y":1.5}, {"label":"_", "x":11, "y":1.5}, {"label":"+", "x":12, "y":1.5}, {"label":"|", "x":13, "y":1.5}, {"label":"<i class='kb kb-Arrows-Left'></i>", "x":14, "y":1.5}, {"label":"Insert", "x":15.5, "y":1.5}, {"label":"Home", "x":16.5, "y":1.5}, {"label":"PgUp", "x":17.5, "y":1.5}, {"label":"Num Lock", "x":19, "y":1.5}, {"label":"/", "x":20, "y":1.5}, {"label":"\uff0a", "x":21, "y":1.5}, {"label":"\u2212", "x":22, "y":1.5}, {"label":"<i class='kb kb-Line-Start-End'></i>", "x":0, "y":2.5, "w":1.5}, {"label":"Q", "x":1.5, "y":2.5}, {"label":"W", "x":2.5, "y":2.5}, {"label":"E", "x":3.5, "y":2.5}, {"label":"R", "x":4.5, "y":2.5}, {"label":"T", "x":5.5, "y":2.5}, {"label":"Y", "x":6.5, "y":2.5}, {"label":"U", "x":7.5, "y":2.5}, {"label":"I", "x":8.5, "y":2.5}, {"label":"O", "x":9.5, "y":2.5}, {"label":"P", "x":10.5, "y":2.5}, {"label":"{", "x":11.5, "y":2.5}, {"label":"}", "x":12.5, "y":2.5}, {"label":"|", "x":13.5, "y":2.5, "w":1.5}, {"label":"Delete", "x":15.5, "y":2.5}, {"label":"End", "x":16.5, "y":2.5}, {"label":"PgDn", "x":17.5, "y":2.5}, {"label":"7", "x":19, "y":2.5}, {"label":"8", "x":20, "y":2.5}, {"label":"9", "x":21, "y":2.5}, {"label":"+", "x":22, "y":2.5}, {"label":"Caps Lock", "x":0, "y":3.5, "w":1.25}, {"label":"A", "x":1.75, "y":3.5}, {"label":"S", "x":2.75, "y":3.5}, {"label":"D", "x":3.75, "y":3.5}, {"label":"F", "x":4.75, "y":3.5}, {"label":"G", "x":5.75, "y":3.5}, {"label":"H", "x":6.75, "y":3.5}, {"label":"J", "x":7.75, "y":3.5}, {"label":"K", "x":8.75, "y":3.5}, {"label":"L", "x":9.75, "y":3.5}, {"label":":", "x":10.75, "y":3.5}, {"label":"@", "x":11.75, "y":3.5}, {"label":"~", "x":12.75, "y":3.5}, {"label":"<i class='kb kb-Return-2'></i>", "x":13.75, "y":3.5, "w":1.25}, {"label":"4", "x":19, "y":3.5}, {"label":"5", "x":20, "y":3.5}, {"label":"6", "x":21, "y":3.5}, {"label":"=", "x":22, "y":3.5}, {"label":"\u21e7", "x":0, "y":4.5, "w":1.25}, {"label":"|", "x":1.25, "y":4.5}, {"label":"Z", "x":2.25, "y":4.5}, {"label":"X", "x":3.25, "y":4.5}, {"label":"C", "x":4.25, "y":4.5}, {"label":"V", "x":5.25, "y":4.5}, {"label":"B", "x":6.25, "y":4.5}, {"label":"N", "x":7.25, "y":4.5}, {"label":"M", "x":8.25, "y":4.5}, {"label":"<", "x":9.25, "y":4.5}, {"label":">", "x":10.25, "y":4.5}, {"label":"?", "x":11.25, "y":4.5}, {"label":"_", "x":12.25, "y":4.5}, {"label":"\u21e7", "x":13.25, "y":4.5, "w":1.75}, {"label":"<i class='kb kb-Arrows-Up'></i>", "x":16.5, "y":4.5}, {"label":"1", "x":19, "y":4.5}, {"label":"2", "x":20, "y":4.5}, {"label":"3", "x":21, "y":4.5}, {"label":"Enter", "x":22, "y":4.5}, {"label":"Ctrl", "x":0, "y":5.5, "w":1.5}, {"label":"Alt", "x":2.5, "y":5.5, "w":1.5}, {"x":4, "y":5.5, "w":7}, {"label":"Alt Gr", "x":11, "y":5.5, "w":1.5}, {"label":"Ctrl", "x":13.5, "y":5.5, "w":1.5}, {"label":"<i class='kb kb-Arrows-Left'></i>", "x":15.5, "y":5.5}, {"label":"<i class='kb kb-Arrows-Down'></i>", "x":16.5, "y":5.5}, {"label":"<i class='kb kb-Arrows-Right'></i>", "x":17.5, "y":5.5}, {"label":"0", "x":19, "y":5.5}, {"label":",", "x":20, "y":5.5}, {"label":".", "x":21, "y":5.5}, {"label":"GUI", "x":22, "y":5.5}]
         }
     }
 }
diff --git a/keyboards/yugo_m/model_m_101/keymaps/an_achronism_106/keymap.c b/keyboards/yugo_m/model_m_101/keymaps/an_achronism_106/keymap.c
new file mode 100644
index 0000000000..4b9646f9ea
--- /dev/null
+++ b/keyboards/yugo_m/model_m_101/keymaps/an_achronism_106/keymap.c
@@ -0,0 +1,53 @@
+/* Copyright 2022 an_achronism <87213873+an-achronism@users.noreply.github.com>
+ *
+ * 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/>.
+ */
+#include QMK_KEYBOARD_H
+
+enum keyboard_layers {
+    _BL, // Base Layer
+    _FN  // Function Layer
+};
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    /* Layer 0: Default Layer
+     * ,-------------------------------------------------------------------------------------------------.
+     * |Esc|   |F1 |F2 |F3 |F4 | |F5 |F6 |F7 |F8 | |F9 |F10|F11|F12|    |PSc|ScL|Cap|                    |
+     * |                                                                                                 |
+     * |`  |1  |2  |3  |4  |5  |6  |7  |8  |9  |0  |-  |=  |BSp|Pse|    |Ins|Hom|PgU|    |Num|/  |*  |=  |
+     * |-----------------------------------------------------------|    |-----------|    |---------------|
+     * |Tab  |Q  |W  |E  |R  |T  |Y  |U  |I  |O  |P  |[  |]  |RCtrl|    |Del|End|PgD|    |7  |8  |9  |-  |
+     * |-----------------------------------------------------------|                     |---------------|
+     * |LCtrl |A  |S  |D  |F  |G  |H  |J  |K  |L  |;  |'  |#  |Rtn |                     |4  |5  |6  |+  |
+     * |-----------------------------------------------------------|                     |---------------|
+     * |LShift|\  |Z  |X  |C  |V  |B  |N  |M  |,  |.  |/  |RShift  |        |Up |        |1  |2  |3  |Ent|
+     * |-----------------------------------------------------------|        |---|        |-----------|   |
+     * |Esc/LAlt| |LGUI |           Space           |BS/Fn|  |RAlt |    |Lt |Dn |Rt |    |0  |Fn |  .|   |
+     * `-------------------------------------------------------------------------------------------------'
+     */
+    [_BL] = LAYOUT_all(
+      KC_ESC,           KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,             KC_PSCR, KC_SLCK, KC_CAPS,
+      KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_MINS, KC_EQL,  KC_BSPC, KC_PAUS,   KC_INS,  KC_HOME, KC_PGUP,   KC_NLCK, KC_PSLS, KC_PAST, KC_PEQL,
+      KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_LBRC, KC_RBRC, KC_RCTL,            KC_DEL,  KC_END,  KC_PGDN,   KC_P7,   KC_P8,   KC_P9,   KC_PMNS,
+      KC_LCTL, KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT, KC_NUHS, KC_ENT,                                          KC_P4,   KC_P5,   KC_P6,   KC_PPLS,
+      KC_LSFT, KC_NUBS, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_INT1, KC_RSFT,                     KC_UP,              KC_P1,   KC_P2,   KC_P3,   KC_PENT,
+      LALT_T(KC_ESC),   KC_LGUI,                            KC_SPC,                                      LT(_FN, KC_BSPC), KC_RALT,            KC_LEFT, KC_DOWN, KC_RGHT,   KC_P0,   MO(_FN), KC_PDOT, KC_NO),
+    [_FN] = LAYOUT_all(
+      _______,          _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,            _______, _______, _______,
+      _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_MUTE, KC_VOLD, KC_VOLU, KC_MSTP, C(KC_BRK), _______, _______, _______,   KC_F10,  KC_F11,  KC_F12,  KC_PWR,
+      _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_PSCR, KC_MPRV, KC_MNXT, KC_APP,             _______, _______, _______,   KC_F7,   KC_F8,   KC_F9,   KC_SLEP,
+      _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_MPLY,                                         KC_F4,   KC_F5,   KC_F6,   KC_CALC,
+      _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,                     _______,            KC_F1,   KC_F2,   KC_F3,   KC_EJCT,
+      _______,          _______,                            _______,                                     _______,          _______,            _______, _______, _______,   _______, _______, _______, _______),
+};
diff --git a/keyboards/yugo_m/model_m_101/keymaps/an_achronism_106/readme.md b/keyboards/yugo_m/model_m_101/keymaps/an_achronism_106/readme.md
new file mode 100644
index 0000000000..6d3a7ff5d9
--- /dev/null
+++ b/keyboards/yugo_m/model_m_101/keymaps/an_achronism_106/readme.md
@@ -0,0 +1,3 @@
+# an_achronism's custom 106-key layout (107-key if you stick the appropriate keys on RShift and JIS backslash, which are already mapped for convenience).
+
+# With the exception of a single extra matrix position between LAlt and Space which only appears on certain later membranes and is almost never actually used, the only unmapped key is the bottom right corner of the numpad (the unused lower half of the vertical 2u key most commonly used as either Enter or Field +). If you like, you can easily add that into the keymap by changing the appropriate KC_NO to whatever you want.
diff --git a/keyboards/yugo_m/model_m_101/keymaps/default/keymap.c b/keyboards/yugo_m/model_m_101/keymaps/default/keymap.c
index 52f79457e2..d8615cb6e5 100644
--- a/keyboards/yugo_m/model_m_101/keymaps/default/keymap.c
+++ b/keyboards/yugo_m/model_m_101/keymaps/default/keymap.c
@@ -1,4 +1,5 @@
 /* Copyright 2020 Nidzo Tomic <tomicn8@hotmail.com>
+ * Copyright 2022 an_achronism <87213873+an-achronism@users.noreply.github.com>
  *
  * 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
@@ -22,24 +23,24 @@ enum keyboard_layers {
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
     /* Layer 0: Default Layer
      * ,-------------------------------------------------------------------------------------------------.
-     * |Esc|   | F1| F2| F3| F4| | F5| F6| F7| F8| | F9|F10|F11|F12|    |PSc|ScL| Ps|                    |
+     * |Esc|   |F1 |F2 |F3 |F4 | |F5 |F6 |F7 |F8 | |F9 |F10|F11|F12|    |PSc|ScL|Pse|                    |
      * |                                                                                                 |
-     * |  `|  1|  2|  3|  4|  5|  6|  7|  8|  9|  0|  -|  =|    BSp|    |Ins|Hom|PgU|    |Num|  /|  *|  -|
+     * |`  |1  |2  |3  |4  |5  |6  |7  |8  |9  |0  |-  |=  |¥  |BSp|    |Ins|Hom|PgU|    |Num|/  |*  |-  |
      * |-----------------------------------------------------------|    |-----------|    |---------------|
-     * |Tab  |  Q|  W|  E|  R|  T|  Y|  U|  I|  O|  P|  [|  ]|    \|    |Del|End|PgD|    |  7|  8|  9|   |
-     * |-----------------------------------------------------------|                     |-----------|   |
-     * |CapsLk|  A|  S|  D|  F|  G|  H|  J|  K|  L|  ;|  '|  #|Ent |                     |  4|  5|  6|  +|
+     * |Tab  |Q  |W  |E  |R  |T  |Y  |U  |I  |O  |P  |[  |]  |\    |    |Del|End|PgD|    |7  |8  |9  |+  |
      * |-----------------------------------------------------------|                     |---------------|
-     * |Shift|  \|  Z|  X|  C|  V|  B|  N|  M|  ,|  .|  /|Shift    |        | Up|        |  1|  2|  3|   |
-     * |-----------------------------------------------------------|        |---|        |-----------|   |
-     * |Ctrl |   |Alt  |           Space          |Alt Gr|   |Ctrl |    | Lt| Dn| Rt|    |      0|  ,|Ent|
+     * |CapsLk|A  |S  |D  |F  |G  |H  |J  |K  |L  |;  |'  |#  |Ent |                     |4  |5  |6  |=  |
+     * |-----------------------------------------------------------|                     |---------------|
+     * |Shift|\  |Z  |X  |C  |V  |B  |N  |M  |,  |.  |/  |\  |Shift|        |Up |        |1  |2  |3  |Ent|
+     * |-----------------------------------------------------------|        |---|        |---------------|
+     * |Ctrl |   |Alt  |           Space          |Alt Gr|   |Ctrl |    |Lt |Dn |Rt |    |0  |,  |.  |GUI|
      * `-------------------------------------------------------------------------------------------------'
      */
     [_BL] = LAYOUT_all(
-      KC_ESC,           KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,    KC_PSCR, KC_SLCK, KC_PAUS,
-      KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_MINS, KC_EQL,  KC_BSPC,   KC_INS,  KC_HOME, KC_PGUP,   KC_NLCK, KC_PSLS, KC_PAST, KC_PMNS,
-      KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_LBRC, KC_RBRC, KC_BSLS,   KC_DEL,  KC_END,  KC_PGDN,   KC_P7,   KC_P8,   KC_P9,   KC_PPLS,
-      KC_CAPS, KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT, KC_NUHS, KC_ENT,                                 KC_P4,   KC_P5,   KC_P6,
-      KC_LSFT, KC_NUBS, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH,          KC_RSFT,            KC_UP,              KC_P1,   KC_P2,   KC_P3,   KC_PENT,
-      KC_LCTL,          KC_LALT,                            KC_SPC,                                      KC_RALT,          KC_RCTL,   KC_LEFT, KC_DOWN, KC_RGHT,   KC_P0,            KC_PDOT),
+      KC_ESC,           KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,             KC_PSCR, KC_SLCK, KC_PAUS,
+      KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_MINS, KC_EQL,  KC_INT3, KC_BSPC,   KC_INS,  KC_HOME, KC_PGUP,   KC_NLCK, KC_PSLS, KC_PAST, KC_PMNS,
+      KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_LBRC, KC_RBRC, KC_BSLS,            KC_DEL,  KC_END,  KC_PGDN,   KC_P7,   KC_P8,   KC_P9,   KC_PPLS,
+      KC_CAPS, KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT, KC_NUHS, KC_ENT,                                          KC_P4,   KC_P5,   KC_P6,   KC_PEQL,
+      KC_LSFT, KC_NUBS, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_INT1, KC_RSFT,                     KC_UP,              KC_P1,   KC_P2,   KC_P3,   KC_PENT,
+      KC_LCTL,          KC_LALT,                            KC_SPC,                                      KC_RALT,          KC_RCTL,            KC_LEFT, KC_DOWN, KC_RGHT,   KC_P0,   KC_INT6, KC_PDOT, KC_LGUI),
 };
diff --git a/keyboards/yugo_m/model_m_101/keymaps/default/readme.md b/keyboards/yugo_m/model_m_101/keymaps/default/readme.md
index ba8b91239e..3d983cc1e7 100644
--- a/keyboards/yugo_m/model_m_101/keymaps/default/readme.md
+++ b/keyboards/yugo_m/model_m_101/keymaps/default/readme.md
@@ -1 +1 @@
-# The default keymap for 101/102 key keyboards. 
+# The default keymap for IBM/Lexmark/Unicomp Enhanced Keyboards (a.k.a. "Keyboard M", "Model M") with arrays comprising between 101 and 108 keys (unused keys can simply be ignored as they will be physically blocked by keycap stabiliser posts). As of February 2022, ANSI, ISO, and JIS key positions are all supported and mapped to the appropriate default functions.
diff --git a/keyboards/yugo_m/model_m_101/keymaps/via/keymap.c b/keyboards/yugo_m/model_m_101/keymaps/via/keymap.c
new file mode 100644
index 0000000000..ee3de82e3b
--- /dev/null
+++ b/keyboards/yugo_m/model_m_101/keymaps/via/keymap.c
@@ -0,0 +1,69 @@
+/* Copyright 2022 an_achronism <87213873+an-achronism@users.noreply.github.com>
+ *
+ * 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/>.
+ */
+#include QMK_KEYBOARD_H
+
+enum keyboard_layers {
+    _L0, // Base Layer
+    _L1,
+    _L2,
+    _L3,
+};
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    /* Layer 0: Default Layer
+     * ,-------------------------------------------------------------------------------------------------.
+     * |Esc|   |F1 |F2 |F3 |F4 | |F5 |F6 |F7 |F8 | |F9 |F10|F11|F12|    |PSc|ScL|Pse|                    |
+     * |                                                                                                 |
+     * |`  |1  |2  |3  |4  |5  |6  |7  |8  |9  |0  |-  |=  |¥  |BSp|    |Ins|Hom|PgU|    |Num|/  |*  |-  |
+     * |-----------------------------------------------------------|    |-----------|    |---------------|
+     * |Tab  |Q  |W  |E  |R  |T  |Y  |U  |I  |O  |P  |[  |]  |\    |    |Del|End|PgD|    |7  |8  |9  |+  |
+     * |-----------------------------------------------------------|                     |---------------|
+     * |CapsLk|A  |S  |D  |F  |G  |H  |J  |K  |L  |;  |'  |#  |Ent |                     |4  |5  |6  |=  |
+     * |-----------------------------------------------------------|                     |---------------|
+     * |Shift|\  |Z  |X  |C  |V  |B  |N  |M  |,  |.  |/  |\  |Shift|        |Up |        |1  |2  |3  |Ent|
+     * |-----------------------------------------------------------|        |---|        |---------------|
+     * |Ctrl |   |Alt  |           Space          |Alt Gr|   |Ctrl |    |Lt |Dn |Rt |    |0  |,  |.  |GUI|
+     * `-------------------------------------------------------------------------------------------------'
+     */
+    [_L0] = LAYOUT_all(
+      KC_ESC,           KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,             KC_PSCR, KC_SLCK, KC_PAUS,
+      KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_MINS, KC_EQL,  KC_INT3, KC_BSPC,   KC_INS,  KC_HOME, KC_PGUP,   KC_NLCK, KC_PSLS, KC_PAST, KC_PMNS,
+      KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_LBRC, KC_RBRC, KC_BSLS,            KC_DEL,  KC_END,  KC_PGDN,   KC_P7,   KC_P8,   KC_P9,   KC_PPLS,
+      KC_CAPS, KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT, KC_NUHS, KC_ENT,                                          KC_P4,   KC_P5,   KC_P6,   KC_PEQL,
+      KC_LSFT, KC_NUBS, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_INT1, KC_RSFT,                     KC_UP,              KC_P1,   KC_P2,   KC_P3,   KC_PENT,
+      KC_LCTL,          KC_LALT,                            KC_SPC,                                      KC_RALT,          KC_RCTL,            KC_LEFT, KC_DOWN, KC_RGHT,   KC_P0,   KC_INT6, KC_PDOT, KC_LGUI),
+    [_L1] = LAYOUT_all(
+      _______,          _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,            _______, _______, _______,
+      _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,   _______, _______, _______,   _______, _______, _______, _______,
+      _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,            _______, _______, _______,   _______, _______, _______, _______,
+      _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,                                         _______, _______, _______, _______,
+      _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,                     _______,            _______, _______, _______, _______,
+      _______,          _______,                            _______,                                     _______,          _______,            _______, _______, _______,   _______, _______, _______, _______),
+    [_L2] = LAYOUT_all(
+      _______,          _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,            _______, _______, _______,
+      _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,   _______, _______, _______,   _______, _______, _______, _______,
+      _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,            _______, _______, _______,   _______, _______, _______, _______,
+      _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,                                         _______, _______, _______, _______,
+      _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,                     _______,            _______, _______, _______, _______,
+      _______,          _______,                            _______,                                     _______,          _______,            _______, _______, _______,   _______, _______, _______, _______),
+    [_L3] = LAYOUT_all(
+      _______,          _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,            _______, _______, _______,
+      _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,   _______, _______, _______,   _______, _______, _______, _______,
+      _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,            _______, _______, _______,   _______, _______, _______, _______,
+      _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,                                         _______, _______, _______, _______,
+      _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,                     _______,            _______, _______, _______, _______,
+      _______,          _______,                            _______,                                     _______,          _______,            _______, _______, _______,   _______, _______, _______, _______),
+};
diff --git a/keyboards/yugo_m/model_m_101/keymaps/via/rules.mk b/keyboards/yugo_m/model_m_101/keymaps/via/rules.mk
new file mode 100644
index 0000000000..1e5b99807c
--- /dev/null
+++ b/keyboards/yugo_m/model_m_101/keymaps/via/rules.mk
@@ -0,0 +1 @@
+VIA_ENABLE = yes
diff --git a/keyboards/yugo_m/model_m_101/model_m_101.h b/keyboards/yugo_m/model_m_101/model_m_101.h
index 7ee44f367b..4b5961ee54 100644
--- a/keyboards/yugo_m/model_m_101/model_m_101.h
+++ b/keyboards/yugo_m/model_m_101/model_m_101.h
@@ -1,4 +1,5 @@
 /* Copyright 2020 Nidzo Tomic <tomicn8@hotmail.com>
+ * Copyright 2022 an_achronism <87213873+an-achronism@users.noreply.github.com>
  *
  * 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
@@ -24,22 +25,22 @@
  * (where COLUMNS and ROWS crosses). */
 
 #define LAYOUT_all( \
-    K5A,      K5B, K5C, K5D, K5E, K5F, K5G, K5H, K5I, K5J, K5K, K5L, K5M,   K5N, K5O, K5P, \
+    K5A,      K5B, K5C, K5D, K5E, K5F, K5G, K5H, K5I, K5J, K5K, K5L, K5M,        K5N, K5O, K5P, \
     \
-    K4A, K4B, K4C, K4D, K4E, K4F, K4G, K4H, K4I, K4J, K4K, K4L, K4M, K4N,   K4O, K4P, K4Q,   K4R, K4S, K4T, K4U, \
-    K3A, K3B, K3C, K3D, K3E, K3F, K3G, K3H, K3I, K3J, K3K, K3L, K3M, K3N,   K3O, K3P, K3Q,   K3R, K3S, K3T, K3U, \
-    K2A, K2B, K2C, K2D, K2E, K2F, K2G, K2H, K2I, K2J, K2K, K2L, K2M, K2N,                    K2O, K2P, K2Q, \
-    K1A, K1B, K1C, K1D, K1E, K1F, K1G, K1H, K1I, K1J, K1K, K1L,      K1M,        K1N,        K1O, K1P, K1Q, K1R, \
-    K0A,      K0B,                K0C,                     K0D,      K0E,   K0F, K0G, K0H,   K0I,      K0J \
+    K4A, K4B, K4C, K4D, K4E, K4F, K4G, K4H, K4I, K4J, K4K, K4L, K4M, MK1, K4N,   K4O, K4P, K4Q,   K4R, K4S, K4T, K4U, \
+    K3A, K3B, K3C, K3D, K3E, K3F, K3G, K3H, K3I, K3J, K3K, K3L, K3M, K3N,        K3O, K3P, K3Q,   K3R, K3S, K3T, K3U, \
+    K2A, K2B, K2C, K2D, K2E, K2F, K2G, K2H, K2I, K2J, K2K, K2L, K2M, K2N,                         K2O, K2P, K2Q, MK2, \
+    K1A, K1B, K1C, K1D, K1E, K1F, K1G, K1H, K1I, K1J, K1K, K1L, MK3, K1M,             K1N,        K1O, K1P, K1Q, K1R, \
+    K0A,      K0B,                K0C,                     K0D,      K0E,        K0F, K0G, K0H,   MK4, K0I, K0J, MK5  \
 ) \
 { \
-/* 00 */ { KC_NO, KC_NO, K5A,   K1B,   K5E,   K2F, K5F,   K2G, K5G,   KC_NO, K2L,   KC_NO, K0I, K0J, K1N,   K0B   }, \
-/* 01 */ { KC_NO, K1A,   K3A,   K2A,   K5D,   K3F, K4N,   K3G, K3M,   K5H,   K3L,   K2O,   K2P, K2Q, KC_NO, KC_NO }, \
+/* 00 */ { KC_NO, KC_NO, K5A,   K1B,   K5E,   K2F, K5F,   K2G, K5G,   KC_NO, K2L,   MK4,   K0I, K0J, K1N,   K0B   }, \
+/* 01 */ { KC_NO, K1A,   K3A,   K2A,   K5D,   K3F, K4N,   K3G, K3M,   K5H,   K3L,   K2O,   K2P, K2Q, MK2,   KC_NO }, \
 /* 02 */ { K0A,   KC_NO, K4A,   K5B,   K5C,   K4F, K5J,   K4G, K4M,   K5I,   K4L,   K3O,   K4O, K4Q, K4P,   KC_NO }, \
 /* 03 */ { KC_NO, KC_NO, K4B,   K4C,   K4D,   K4E, K5K,   K4H, K4I,   K4J,   K4K,   K5L,   K5M, K3Q, K3P,   K5N   }, \
-/* 04 */ { KC_NO, KC_NO, K3B,   K3C,   K3D,   K3E, KC_NO, K3H, K3I,   K3J,   K3K,   K3R,   K3S, K3T, K3U,   K5O   }, \
-/* 05 */ { KC_NO, KC_NO, K2B,   K2C,   K2D,   K2E, K3N,   K2H, K2I,   K2J,   K2K,   K1O,   K1P, K1Q, K1R,   KC_NO }, \
+/* 04 */ { KC_NO, KC_NO, K3B,   K3C,   K3D,   K3E, MK1,   K3H, K3I,   K3J,   K3K,   K3R,   K3S, K3T, K3U,   K5O   }, \
+/* 05 */ { KC_NO, KC_NO, K2B,   K2C,   K2D,   K2E, K3N,   K2H, K2I,   K2J,   K2K,   K1O,   K1P, K1Q, K1R,   MK5   }, \
 /* 06 */ { K0E,   K1M,   K1C,   K1D,   K1E,   K1F, K2N,   K1I, K1J,   K1K,   K2M,   K4R,   K4S, K4T, K5P,   KC_NO }, \
-/* 07 */ { KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, K1G, K0C,   K1H, KC_NO, KC_NO, K1L,   K0G,   K0H, K4U, K0F,   K0D   }, \
+/* 07 */ { KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, K1G, K0C,   K1H, MK3,   KC_NO, K1L,   K0G,   K0H, K4U, K0F,   K0D   }, \
 }
 /*         0      1      2      3      4      5    6      7    8      9      A      B      C    D    E      F       */
diff --git a/keyboards/yugo_m/model_m_101/readme.md b/keyboards/yugo_m/model_m_101/readme.md
index 598f0fa79d..7c14dea804 100644
--- a/keyboards/yugo_m/model_m_101/readme.md
+++ b/keyboards/yugo_m/model_m_101/readme.md
@@ -15,3 +15,11 @@ Make example for this keyboard (after setting up your build environment):
     make yugo_m/model_m_101:default
 
 See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
+
+
+
+Note regarding 2022 matrix update:
+
+The original author's firmware did not make several lesser-used membrane/matrix positions available to the controller. These are useful for JIS users and/or if you simply want to create a more unique layout. I've added all of the unused membrane positions to the firmware, except for an extremely seldom used one that sits in the left side of the space bar on some later membranes (I would have added it if I knew its matrix position, but I haven't mapped that out yet). The default mappings for these additional keys follow JIS conventions, except for the extra key on the bottom right corner of the numpad (lower half of vertical 2u Enter), which I've mapped to the LGUI key a.k.a. left Windows/Command key for now. Remap as you wish!
+
+- an_achronism, February 2022
\ No newline at end of file