Add support for YMD75 V4 - ISO (#22128)

10 files changed, 414 insertions, 0 deletions

diff --git a/keyboards/ymdk/ymd75/rev4/iso/board.h b/keyboards/ymdk/ymd75/rev4/iso/board.h
new file mode 100644
index 0000000000..3cd1802102
--- /dev/null
+++ b/keyboards/ymdk/ymd75/rev4/iso/board.h
@@ -0,0 +1,8 @@
+// Copyright 2023 zvecr<git@zvecr.com>
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+
+#include_next <board.h>
+
+#undef STM32_HSECLK
+#define STM32_HSECLK 16000000
diff --git a/keyboards/ymdk/ymd75/rev4/iso/config.h b/keyboards/ymdk/ymd75/rev4/iso/config.h
new file mode 100644
index 0000000000..317c0ec236
--- /dev/null
+++ b/keyboards/ymdk/ymd75/rev4/iso/config.h
@@ -0,0 +1,11 @@
+// Copyright 2023 zvecr<git@zvecr.com>
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+
+#define RGB_DISABLE_WHEN_USB_SUSPENDED
+
+#define WS2812_PWM_DRIVER PWMD4
+#define WS2812_PWM_CHANNEL 4
+#define WS2812_PWM_PAL_MODE 2
+#define WS2812_DMA_STREAM STM32_DMA1_STREAM7
+#define WS2812_DMA_CHANNEL 7
diff --git a/keyboards/ymdk/ymd75/rev4/iso/halconf.h b/keyboards/ymdk/ymd75/rev4/iso/halconf.h
new file mode 100644
index 0000000000..782eea99a4
--- /dev/null
+++ b/keyboards/ymdk/ymd75/rev4/iso/halconf.h
@@ -0,0 +1,7 @@
+// Copyright 2023 zvecr<git@zvecr.com>
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+
+#define HAL_USE_PWM TRUE
+
+#include_next <halconf.h>
diff --git a/keyboards/ymdk/ymd75/rev4/iso/info.json b/keyboards/ymdk/ymd75/rev4/iso/info.json
new file mode 100644
index 0000000000..d7e27dbdeb
--- /dev/null
+++ b/keyboards/ymdk/ymd75/rev4/iso/info.json
@@ -0,0 +1,277 @@
+{
+    "keyboard_name": "YMD75 V4",
+    "manufacturer": "YMDK",
+    "url": "",
+    "maintainer": "zvecr",
+    "processor": "STM32F103",
+    "bootloader": "uf2boot",
+    "board": "STM32_F103_STM32DUINO",
+    "diode_direction": "ROW2COL",
+    "matrix_pins": {
+        "cols": ["A7","B0","B1","B2","B10","B11","A5","A15","B3"],
+        "rows": ["A6","A4","A3","A2","A1","A0","A8","B15","B14","B13","B12","A9"]
+    },
+    "usb": {
+        "vid": "0x594D",
+        "pid": "0x7549",
+        "device_version": "4.0.0"
+    },
+    "features": {
+        "bootmagic": true,
+        "command": false,
+        "console": false,
+        "extrakey": true,
+        "mousekey": true,
+        "nkro": true,
+        "rgb_matrix": true
+    },
+    "ws2812": {
+        "driver": "pwm",
+        "pin": "B9"
+    },
+    "rgb_matrix": {
+        "driver": "ws2812",
+        "max_brightness": 200,
+        "animations": {
+            "alphas_mods": true,
+            "gradient_up_down": true,
+            "gradient_left_right": true,
+            "breathing": true,
+            "band_sat": true,
+            "band_val": true,
+            "band_pinwheel_sat": true,
+            "band_pinwheel_val": true,
+            "band_spiral_sat": true,
+            "band_spiral_val": true,
+            "cycle_all": true,
+            "cycle_left_right": true,
+            "cycle_up_down": true,
+            "cycle_out_in": true,
+            "cycle_out_in_dual": true,
+            "rainbow_moving_chevron": true,
+            "cycle_pinwheel": true,
+            "cycle_spiral": true,
+            "dual_beacon": true,
+            "rainbow_beacon": true,
+            "rainbow_pinwheels": true,
+            "raindrops": true,
+            "jellybean_raindrops": true,
+            "hue_breathing": true,
+            "hue_pendulum": true,
+            "hue_wave": true,
+            "pixel_fractal": true,
+            "pixel_flow": true,
+            "pixel_rain": true,
+            "typing_heatmap": true,
+            "digital_rain": true,
+            "solid_reactive_simple": true,
+            "solid_reactive": true,
+            "solid_reactive_wide": true,
+            "solid_reactive_multiwide": true,
+            "solid_reactive_cross": true,
+            "solid_reactive_multicross": true,
+            "solid_reactive_nexus": true,
+            "solid_reactive_multinexus": true,
+            "splash": true,
+            "multisplash": true,
+            "solid_splash": true,
+            "solid_multisplash": true
+        },
+        "layout": [
+            { "flags": 4, "matrix": [0, 0],  "x": 0,   "y": 0 },
+            { "flags": 4, "matrix": [0, 1],  "x": 15,  "y": 0 },
+            { "flags": 4, "matrix": [0, 2],  "x": 30,  "y": 0 },
+            { "flags": 4, "matrix": [0, 3],  "x": 45,  "y": 0 },
+            { "flags": 4, "matrix": [0, 4],  "x": 60,  "y": 0 },
+            { "flags": 4, "matrix": [0, 5],  "x": 75,  "y": 0 },
+            { "flags": 4, "matrix": [0, 6],  "x": 90,  "y": 0 },
+            { "flags": 4, "matrix": [0, 7],  "x": 105, "y": 0 },
+            { "flags": 4, "matrix": [0, 8],  "x": 119, "y": 0 },
+            { "flags": 4, "matrix": [6, 8],  "x": 134, "y": 0 },
+            { "flags": 4, "matrix": [6, 7],  "x": 149, "y": 0 },
+            { "flags": 4, "matrix": [6, 5],  "x": 164, "y": 0 },
+            { "flags": 4, "matrix": [6, 4],  "x": 179, "y": 0 },
+            { "flags": 4, "matrix": [6, 3],  "x": 194, "y": 0 },
+            { "flags": 4, "matrix": [6, 6],  "x": 209, "y": 0 },
+            { "flags": 4, "matrix": [6, 2],  "x": 224, "y": 0 },
+            { "flags": 4, "matrix": [1, 0],  "x": 0,   "y": 13 },
+            { "flags": 4, "matrix": [1, 1],  "x": 15,  "y": 13 },
+            { "flags": 4, "matrix": [1, 2],  "x": 30,  "y": 13 },
+            { "flags": 4, "matrix": [1, 3],  "x": 45,  "y": 13 },
+            { "flags": 4, "matrix": [1, 4],  "x": 60,  "y": 13 },
+            { "flags": 4, "matrix": [1, 5],  "x": 75,  "y": 13 },
+            { "flags": 4, "matrix": [1, 6],  "x": 90,  "y": 13 },
+            { "flags": 4, "matrix": [1, 7],  "x": 105, "y": 13 },
+            { "flags": 4, "matrix": [1, 8],  "x": 119, "y": 13 },
+            { "flags": 4, "matrix": [7, 8],  "x": 134, "y": 13 },
+            { "flags": 4, "matrix": [7, 7],  "x": 149, "y": 13 },
+            { "flags": 4, "matrix": [7, 5],  "x": 164, "y": 13 },
+            { "flags": 4, "matrix": [7, 4],  "x": 179, "y": 13 },
+            { "flags": 4, "matrix": [7, 6],  "x": 202, "y": 13 },
+            { "flags": 4, "matrix": [7, 2],  "x": 224, "y": 13 },
+            { "flags": 4, "matrix": [2, 0],  "x": 4,   "y": 26 },
+            { "flags": 4, "matrix": [2, 1],  "x": 22,  "y": 26 },
+            { "flags": 4, "matrix": [2, 2],  "x": 37,  "y": 26 },
+            { "flags": 4, "matrix": [2, 3],  "x": 52,  "y": 26 },
+            { "flags": 4, "matrix": [2, 4],  "x": 67,  "y": 26 },
+            { "flags": 4, "matrix": [2, 5],  "x": 82,  "y": 26 },
+            { "flags": 4, "matrix": [2, 6],  "x": 97,  "y": 26 },
+            { "flags": 4, "matrix": [2, 7],  "x": 112, "y": 26 },
+            { "flags": 4, "matrix": [2, 8],  "x": 127, "y": 26 },
+            { "flags": 4, "matrix": [8, 8],  "x": 142, "y": 26 },
+            { "flags": 4, "matrix": [8, 7],  "x": 157, "y": 26 },
+            { "flags": 4, "matrix": [8, 5],  "x": 172, "y": 26 },
+            { "flags": 4, "matrix": [8, 4],  "x": 187, "y": 26 },
+            { "flags": 4, "matrix": [8, 3],  "x": 207, "y": 32 },
+            { "flags": 4, "matrix": [8, 6],  "x": 224, "y": 26 },
+            { "flags": 4, "matrix": [3, 0],  "x": 6,   "y": 38 },
+            { "flags": 4, "matrix": [3, 1],  "x": 26,  "y": 38 },
+            { "flags": 4, "matrix": [3, 2],  "x": 41,  "y": 38 },
+            { "flags": 4, "matrix": [3, 3],  "x": 56,  "y": 38 },
+            { "flags": 4, "matrix": [3, 4],  "x": 71,  "y": 38 },
+            { "flags": 4, "matrix": [3, 5],  "x": 86,  "y": 38 },
+            { "flags": 4, "matrix": [3, 6],  "x": 101, "y": 38 },
+            { "flags": 4, "matrix": [3, 7],  "x": 116, "y": 38 },
+            { "flags": 4, "matrix": [3, 8],  "x": 131, "y": 38 },
+            { "flags": 4, "matrix": [9, 8],  "x": 146, "y": 38 },
+            { "flags": 4, "matrix": [9, 7],  "x": 161, "y": 38 },
+            { "flags": 4, "matrix": [9, 5],  "x": 175, "y": 38 },
+            { "flags": 4, "matrix": [9, 4],  "x": 190, "y": 38 },
+            { "flags": 4, "matrix": [9, 6],  "x": 224, "y": 38 },
+            { "flags": 4, "matrix": [4, 0],  "x": 2,   "y": 51 },
+            { "flags": 4, "matrix": [4, 1],  "x": 19,  "y": 51 },
+            { "flags": 4, "matrix": [4, 2],  "x": 34,  "y": 51 },
+            { "flags": 4, "matrix": [4, 3],  "x": 49,  "y": 51 },
+            { "flags": 4, "matrix": [4, 4],  "x": 63,  "y": 51 },
+            { "flags": 4, "matrix": [4, 5],  "x": 78,  "y": 51 },
+            { "flags": 4, "matrix": [4, 6],  "x": 93,  "y": 51 },
+            { "flags": 4, "matrix": [4, 7],  "x": 108, "y": 51 },
+            { "flags": 4, "matrix": [4, 8],  "x": 123, "y": 51 },
+            { "flags": 4, "matrix": [10, 8], "x": 138, "y": 51 },
+            { "flags": 4, "matrix": [10, 7], "x": 153, "y": 51 },
+            { "flags": 4, "matrix": [10, 5], "x": 168, "y": 51 },
+            { "flags": 4, "matrix": [10, 4], "x": 189, "y": 51 },
+            { "flags": 4, "matrix": [10, 3], "x": 209, "y": 51 },
+            { "flags": 4, "matrix": [10, 6], "x": 224, "y": 51 },
+            { "flags": 4, "matrix": [5, 0],  "x": 2,   "y": 64 },
+            { "flags": 4, "matrix": [5, 1],  "x": 21,  "y": 64 },
+            { "flags": 4, "matrix": [5, 2],  "x": 39,  "y": 64 },
+            { "flags": 4, "matrix": [5, 6],  "x": 95,  "y": 64 },
+            { "flags": 4, "matrix": [5, 8],  "x": 149, "y": 64 },
+            { "flags": 4, "matrix": [5, 7],  "x": 164, "y": 64 },
+            { "flags": 4, "matrix": [5, 5],  "x": 179, "y": 64 },
+            { "flags": 4, "matrix": [5, 4],  "x": 194, "y": 64 },
+            { "flags": 4, "matrix": [5, 3],  "x": 209, "y": 64 },
+            { "flags": 4, "matrix": [11, 6], "x": 224, "y": 64 },
+            { "flags": 2, "x": 1,  "y": 5 },
+            { "flags": 2, "x": 38, "y": 5 },
+            { "flags": 2, "x": 75, "y": 5 },
+            { "flags": 2, "x": 112, "y": 5 },
+            { "flags": 2, "x": 149, "y": 5 },
+            { "flags": 2, "x": 186, "y": 5 },
+            { "flags": 2, "x": 223, "y": 5 },
+            { "flags": 2, "x": 223, "y": 32 },
+            { "flags": 2, "x": 223, "y": 60 },
+            { "flags": 2, "x": 186, "y": 60 },
+            { "flags": 2, "x": 149, "y": 60 },
+            { "flags": 2, "x": 112, "y": 60 },
+            { "flags": 2, "x": 75, "y": 60 },
+            { "flags": 2, "x": 38, "y": 60 },
+            { "flags": 2, "x": 1, "y": 60 },
+            { "flags": 2, "x": 1, "y": 32 }
+        ]
+    },
+    "community_layouts": ["75_iso"],
+    "layouts": {
+        "LAYOUT_75_iso": {
+            "layout": [
+                {"matrix": [0, 0], "x":0, "y":0},
+                {"matrix": [0, 1], "x":1, "y":0},
+                {"matrix": [0, 2], "x":2, "y":0},
+                {"matrix": [0, 3], "x":3, "y":0},
+                {"matrix": [0, 4], "x":4, "y":0},
+                {"matrix": [0, 5], "x":5, "y":0},
+                {"matrix": [0, 6], "x":6, "y":0},
+                {"matrix": [0, 7], "x":7, "y":0},
+                {"matrix": [0, 8], "x":8, "y":0},
+                {"matrix": [6, 8], "x":9, "y":0},
+                {"matrix": [6, 7], "x":10, "y":0},
+                {"matrix": [6, 5], "x":11, "y":0},
+                {"matrix": [6, 4], "x":12, "y":0},
+                {"matrix": [6, 3], "x":13, "y":0},
+                {"matrix": [6, 6], "x":14, "y":0},
+                {"matrix": [6, 2], "x":15, "y":0},
+                {"matrix": [1, 0], "x":0, "y":1},
+                {"matrix": [1, 1], "x":1, "y":1},
+                {"matrix": [1, 2], "x":2, "y":1},
+                {"matrix": [1, 3], "x":3, "y":1},
+                {"matrix": [1, 4], "x":4, "y":1},
+                {"matrix": [1, 5], "x":5, "y":1},
+                {"matrix": [1, 6], "x":6, "y":1},
+                {"matrix": [1, 7], "x":7, "y":1},
+                {"matrix": [1, 8], "x":8, "y":1},
+                {"matrix": [7, 8], "x":9, "y":1},
+                {"matrix": [7, 7], "x":10, "y":1},
+                {"matrix": [7, 5], "x":11, "y":1},
+                {"matrix": [7, 4], "x":12, "y":1},
+                {"matrix": [7, 6], "x":13, "y":1, "w":2},
+                {"matrix": [7, 2], "x":15, "y":1},
+                {"matrix": [2, 0], "x":0, "y":2, "w":1.5},
+                {"matrix": [2, 1], "x":1.5, "y":2},
+                {"matrix": [2, 2], "x":2.5, "y":2},
+                {"matrix": [2, 3], "x":3.5, "y":2},
+                {"matrix": [2, 4], "x":4.5, "y":2},
+                {"matrix": [2, 5], "x":5.5, "y":2},
+                {"matrix": [2, 6], "x":6.5, "y":2},
+                {"matrix": [2, 7], "x":7.5, "y":2},
+                {"matrix": [2, 8], "x":8.5, "y":2},
+                {"matrix": [8, 8], "x":9.5, "y":2},
+                {"matrix": [8, 7], "x":10.5, "y":2},
+                {"matrix": [8, 5], "x":11.5, "y":2},
+                {"matrix": [8, 4], "x":12.5, "y":2},
+                {"matrix": [8, 6], "x":15, "y":2},
+                {"matrix": [3, 0], "x":0, "y":3, "w":1.75},
+                {"matrix": [3, 1], "x":1.75, "y":3},
+                {"matrix": [3, 2], "x":2.75, "y":3},
+                {"matrix": [3, 3], "x":3.75, "y":3},
+                {"matrix": [3, 4], "x":4.75, "y":3},
+                {"matrix": [3, 5], "x":5.75, "y":3},
+                {"matrix": [3, 6], "x":6.75, "y":3},
+                {"matrix": [3, 7], "x":7.75, "y":3},
+                {"matrix": [3, 8], "x":8.75, "y":3},
+                {"matrix": [9, 8], "x":9.75, "y":3},
+                {"matrix": [9, 7], "x":10.75, "y":3},
+                {"matrix": [9, 5], "x":11.75, "y":3},
+                {"matrix": [9, 4], "x":12.75, "y":3},
+                {"matrix": [8, 3], "x":13.75, "y":2, "w":1.25, "h":2},
+                {"matrix": [9, 6], "x":15, "y":3},
+                {"matrix": [4, 0], "x":0, "y":4, "w":1.25},
+                {"matrix": [4, 1], "x":1.25, "y":4},
+                {"matrix": [4, 2], "x":2.25, "y":4},
+                {"matrix": [4, 3], "x":3.25, "y":4},
+                {"matrix": [4, 4], "x":4.25, "y":4},
+                {"matrix": [4, 5], "x":5.25, "y":4},
+                {"matrix": [4, 6], "x":6.25, "y":4},
+                {"matrix": [4, 7], "x":7.25, "y":4},
+                {"matrix": [4, 8], "x":8.25, "y":4},
+                {"matrix": [10, 8], "x":9.25, "y":4},
+                {"matrix": [10, 7], "x":10.25, "y":4},
+                {"matrix": [10, 5], "x":11.25, "y":4},
+                {"matrix": [10, 4], "x":12.25, "y":4, "w":1.75},
+                {"matrix": [10, 3], "x":14, "y":4},
+                {"matrix": [10, 6], "x":15, "y":4},
+                {"matrix": [5, 0], "x":0, "y":5, "w":1.25},
+                {"matrix": [5, 1], "x":1.25, "y":5, "w":1.25},
+                {"matrix": [5, 2], "x":2.5, "y":5, "w":1.25},
+                {"matrix": [5, 6], "x":3.75, "y":5, "w":6.25},
+                {"matrix": [5, 8], "x":10, "y":5},
+                {"matrix": [5, 7], "x":11, "y":5},
+                {"matrix": [5, 5], "x":12, "y":5},
+                {"matrix": [5, 4], "x":13, "y":5},
+                {"matrix": [5, 3], "x":14, "y":5},
+                {"matrix": [11, 6], "x":15, "y":5}
+            ]
+        }
+    }
+}
+
diff --git a/keyboards/ymdk/ymd75/rev4/iso/keymaps/default/keymap.c b/keyboards/ymdk/ymd75/rev4/iso/keymaps/default/keymap.c
new file mode 100644
index 0000000000..15dc1dc8b7
--- /dev/null
+++ b/keyboards/ymdk/ymd75/rev4/iso/keymaps/default/keymap.c
@@ -0,0 +1,37 @@
+// Copyright 2023 zvecr<git@zvecr.com>
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+     /*
+     * ┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┐
+     * │Esc│F1 │F2 │F3 │F4 │F5 │F6 │F7 │F8 │F9 │F10│F11│F12│PSc│Pse│Del│
+     * ├───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┴───┼───┤
+     * │ ` │ 1 │ 2 │ 3 │ 4 │ 5 │ 6 │ 7 │ 8 │ 9 │ 0 │ - │ = │ Backsp│Hom│
+     * ├───┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─────┼───┤
+     * │ Tab │ Q │ W │ E │ R │ T │ Y │ U │ I │ O │ P │ [ │ ] │     │PgU│
+     * ├─────┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┐ Ent├───┤
+     * │ Caps │ A │ S │ D │ F │ G │ H │ J │ K │ L │ ; │ ' │ # │    │PgD│
+     * ├────┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴───┴┬───┼───┤
+     * │Shft│ \ │ Z │ X │ C │ V │ B │ N │ M │ , │ . │ / │ Shift│ ↑ │End│
+     * ├────┼───┴┬──┴─┬─┴───┴───┴───┴───┴───┴──┬┴──┬┴──┬┴──┬───┼───┼───┤
+     * │Ctrl│GUI │Alt │                        │Alt│GUI│Ctl│ ← │ ↓ │ → │
+     * └────┴────┴────┴────────────────────────┴───┴───┴───┴───┴───┴───┘
+     */
+    [0] = LAYOUT_75_iso(
+        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_PAUS, KC_DEL,
+        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_HOME,
+        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_PGUP,
+        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_PGDN,
+        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_END,
+        KC_LCTL, KC_LGUI, KC_LALT,                            KC_SPC,                             KC_RALT, MO(1),   KC_RCTL, KC_LEFT, KC_DOWN, KC_RGHT
+    ),
+    [1] = LAYOUT_75_iso(
+        QK_BOOT, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+        _______, RGB_TOG, RGB_MOD, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,          _______,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,                   _______,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,          _______,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,          _______, _______, _______,
+        _______, _______, _______,                            _______,                            _______, _______, _______, _______, _______, _______
+    ),
+};
diff --git a/keyboards/ymdk/ymd75/rev4/iso/keymaps/via/keymap.c b/keyboards/ymdk/ymd75/rev4/iso/keymaps/via/keymap.c
new file mode 100644
index 0000000000..15dc1dc8b7
--- /dev/null
+++ b/keyboards/ymdk/ymd75/rev4/iso/keymaps/via/keymap.c
@@ -0,0 +1,37 @@
+// Copyright 2023 zvecr<git@zvecr.com>
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+     /*
+     * ┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┐
+     * │Esc│F1 │F2 │F3 │F4 │F5 │F6 │F7 │F8 │F9 │F10│F11│F12│PSc│Pse│Del│
+     * ├───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┴───┼───┤
+     * │ ` │ 1 │ 2 │ 3 │ 4 │ 5 │ 6 │ 7 │ 8 │ 9 │ 0 │ - │ = │ Backsp│Hom│
+     * ├───┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─────┼───┤
+     * │ Tab │ Q │ W │ E │ R │ T │ Y │ U │ I │ O │ P │ [ │ ] │     │PgU│
+     * ├─────┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┐ Ent├───┤
+     * │ Caps │ A │ S │ D │ F │ G │ H │ J │ K │ L │ ; │ ' │ # │    │PgD│
+     * ├────┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴───┴┬───┼───┤
+     * │Shft│ \ │ Z │ X │ C │ V │ B │ N │ M │ , │ . │ / │ Shift│ ↑ │End│
+     * ├────┼───┴┬──┴─┬─┴───┴───┴───┴───┴───┴──┬┴──┬┴──┬┴──┬───┼───┼───┤
+     * │Ctrl│GUI │Alt │                        │Alt│GUI│Ctl│ ← │ ↓ │ → │
+     * └────┴────┴────┴────────────────────────┴───┴───┴───┴───┴───┴───┘
+     */
+    [0] = LAYOUT_75_iso(
+        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_PAUS, KC_DEL,
+        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_HOME,
+        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_PGUP,
+        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_PGDN,
+        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_END,
+        KC_LCTL, KC_LGUI, KC_LALT,                            KC_SPC,                             KC_RALT, MO(1),   KC_RCTL, KC_LEFT, KC_DOWN, KC_RGHT
+    ),
+    [1] = LAYOUT_75_iso(
+        QK_BOOT, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+        _______, RGB_TOG, RGB_MOD, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,          _______,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,                   _______,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,          _______,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,          _______, _______, _______,
+        _______, _______, _______,                            _______,                            _______, _______, _______, _______, _______, _______
+    ),
+};
diff --git a/keyboards/ymdk/ymd75/rev4/iso/keymaps/via/rules.mk b/keyboards/ymdk/ymd75/rev4/iso/keymaps/via/rules.mk
new file mode 100644
index 0000000000..1e5b99807c
--- /dev/null
+++ b/keyboards/ymdk/ymd75/rev4/iso/keymaps/via/rules.mk
@@ -0,0 +1 @@
+VIA_ENABLE = yes
diff --git a/keyboards/ymdk/ymd75/rev4/iso/mcuconf.h b/keyboards/ymdk/ymd75/rev4/iso/mcuconf.h
new file mode 100644
index 0000000000..a7e5a1c058
--- /dev/null
+++ b/keyboards/ymdk/ymd75/rev4/iso/mcuconf.h
@@ -0,0 +1,11 @@
+// Copyright 2023 zvecr<git@zvecr.com>
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+
+#include_next <mcuconf.h>
+
+#undef STM32_PWM_USE_TIM4
+#define STM32_PWM_USE_TIM4 TRUE
+
+#undef STM32_PLLXTPRE
+#define STM32_PLLXTPRE STM32_PLLXTPRE_DIV2
diff --git a/keyboards/ymdk/ymd75/rev4/iso/readme.md b/keyboards/ymdk/ymd75/rev4/iso/readme.md
new file mode 100644
index 0000000000..43b0c92224
--- /dev/null
+++ b/keyboards/ymdk/ymd75/rev4/iso/readme.md
@@ -0,0 +1,24 @@
+# YMD75 V4
+
+75% per key RGB hotswap PCB with North Facing LED.
+
+* Keyboard Maintainer: [zvecr](https://github.com/zvecr)
+* Hardware Availability: <https://ymdkey.com/products/ymd-75-84-v4-rgb-hotswap-pcb-plate-north-facing-via-vial-fully-programmable>
+
+Make example for this keyboard (after setting up your build environment):
+
+    make ymdk/ymd75/rev4/iso:default
+
+Flashing example for this keyboard:
+
+    make ymdk/ymd75/rev4/iso:default:flash
+
+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).
+
+## Bootloader
+
+Enter the bootloader in 3 ways:
+
+* **Bootmagic reset**: Hold down the key at (0,0) in the matrix (usually the top left key or Escape) and plug in the keyboard
+* **Physical reset button**: Quickly double tap the button on the back of the PCB
+* **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is available
diff --git a/keyboards/ymdk/ymd75/rev4/iso/rules.mk b/keyboards/ymdk/ymd75/rev4/iso/rules.mk
new file mode 100644
index 0000000000..6e7633bfe0
--- /dev/null
+++ b/keyboards/ymdk/ymd75/rev4/iso/rules.mk
@@ -0,0 +1 @@
+# This file intentionally left blank