diff --git a/keyboards/pos78/config.h b/keyboards/pos78/config.h
new file mode 100644
index 000000000..c307c6f5c
--- /dev/null
+++ b/keyboards/pos78/config.h
@@ -0,0 +1,110 @@
+/*
+Copyright 2020 smssmssms
+
+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 .
+*/
+
+#pragma once
+
+#include "config_common.h"
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID 0xFEED
+#define PRODUCT_ID 0x7878
+#define DEVICE_VER 0x0001
+#define MANUFACTURER smssmssms
+#define PRODUCT POS78
+
+/* key matrix size */
+#define MATRIX_ROWS 6
+#define MATRIX_COLS 13
+
+/*
+ * Keyboard Matrix Assignments
+ *
+ * COLS: AVR pins used for columns, left to right
+ * ROWS: AVR pins used for rows, top to bottom
+ * DIODE_DIRECTION: COL2ROW = COL = Anode (+), ROW = Cathode (-, marked on diode)
+ * ROW2COL = ROW = Anode (+), COL = Cathode (-, marked on diode)
+ *
+ */
+#define MATRIX_ROW_PINS { F7, F6, F5, F4, F1, F0 }
+#define MATRIX_COL_PINS { C7, D6, B7 ,B6, B5, E6, C6, D0, D1, D3, D2, B1, B2 }
+#define UNUSED_PINS
+
+/* COL2ROW, ROW2COL */
+#define DIODE_DIRECTION ROW2COL
+
+/*
+ * Split Keyboard specific options, make sure you have 'SPLIT_KEYBOARD = yes' in your rules.mk, and define SOFT_SERIAL_PIN.
+ */
+#define SOFT_SERIAL_PIN D0 // or D1, D2, D3, E6
+
+/* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
+#define DEBOUNCE 5
+
+/* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
+#define LOCKING_SUPPORT_ENABLE
+/* Locking resynchronize hack */
+#define LOCKING_RESYNC_ENABLE
+
+/* If defined, GRAVE_ESC will always act as ESC when CTRL is held.
+ * This is useful for the Windows task manager shortcut (ctrl+shift+esc).
+ */
+//#define GRAVE_ESC_CTRL_OVERRIDE
+
+/*
+ * Force NKRO
+ *
+ * Force NKRO (nKey Rollover) to be enabled by default, regardless of the saved
+ * state in the bootmagic EEPROM settings. (Note that NKRO must be enabled in the
+ * makefile for this to work.)
+ *
+ * If forced on, NKRO can be disabled via magic key (default = LShift+RShift+N)
+ * until the next keyboard reset.
+ *
+ * NKRO may prevent your keystrokes from being detected in the BIOS, but it is
+ * fully operational during normal computer usage.
+ *
+ * For a less heavy-handed approach, enable NKRO via magic key (LShift+RShift+N)
+ * or via bootmagic (hold SPACE+N while plugging in the keyboard). Once set by
+ * bootmagic, NKRO mode will always be enabled until it is toggled again during a
+ * power-up.
+ *
+ */
+//#define FORCE_NKRO
+
+/*
+ * Feature disable options
+ * These options are also useful to firmware size reduction.
+ */
+
+/* disable debug print */
+//#define NO_DEBUG
+
+/* disable print */
+//#define NO_PRINT
+
+/* disable action features */
+//#define NO_ACTION_LAYER
+//#define NO_ACTION_TAPPING
+//#define NO_ACTION_ONESHOT
+
+/* disable these deprecated features by default */
+#define NO_ACTION_MACRO
+#define NO_ACTION_FUNCTION
+
+/* Bootmagic Lite key configuration */
+//#define BOOTMAGIC_LITE_ROW 0
+//#define BOOTMAGIC_LITE_COLUMN 0
diff --git a/keyboards/pos78/info.json b/keyboards/pos78/info.json
new file mode 100644
index 000000000..cbe894fd9
--- /dev/null
+++ b/keyboards/pos78/info.json
@@ -0,0 +1,19 @@
+{
+ "keyboard_name": "pos78",
+ "url": "https://github.com/smssmssms/pos78.git",
+ "maintainer": "smssmssms",
+ "width": 13,
+ "height": 6,
+ "layouts": {
+ "LAYOUT_ortho_6x13": {
+ "layout": [
+ {"x":0, "y":0}, {"x":1, "y":0}, {"x":2, "y":0}, {"x":3, "y":0}, {"x":4, "y":0}, {"x":5, "y":0}, {"x":6, "y":0}, {"x":7, "y":0}, {"x":8, "y":0}, {"x":9, "y":0}, {"x":10, "y":0}, {"x":11, "y":0}, {"x":12, "y":0},
+ {"x":0, "y":1}, {"x":1, "y":1}, {"x":2, "y":1}, {"x":3, "y":1}, {"x":4, "y":1}, {"x":5, "y":1}, {"x":6, "y":1}, {"x":7, "y":1}, {"x":8, "y":1}, {"x":9, "y":1}, {"x":10, "y":1}, {"x":11, "y":1}, {"x":12, "y":1},
+ {"x":0, "y":2}, {"x":1, "y":2}, {"x":2, "y":2}, {"x":3, "y":2}, {"x":4, "y":2}, {"x":5, "y":2}, {"x":6, "y":2}, {"x":7, "y":2}, {"x":8, "y":2}, {"x":9, "y":2}, {"x":10, "y":2}, {"x":11, "y":2}, {"x":12, "y":2},
+ {"x":0, "y":3}, {"x":1, "y":3}, {"x":2, "y":3}, {"x":3, "y":3}, {"x":4, "y":3}, {"x":5, "y":3}, {"x":6, "y":3}, {"x":7, "y":3}, {"x":8, "y":3}, {"x":9, "y":3}, {"x":10, "y":3}, {"x":11, "y":3}, {"x":12, "y":3},
+ {"x":0, "y":4}, {"x":1, "y":4}, {"x":2, "y":4}, {"x":3, "y":4}, {"x":4, "y":4}, {"x":5, "y":4}, {"x":6, "y":4}, {"x":7, "y":4}, {"x":8, "y":4}, {"x":9, "y":4}, {"x":10, "y":4}, {"x":11, "y":4}, {"x":12, "y":4},
+ {"x":0, "y":5}, {"x":1, "y":5}, {"x":2, "y":5}, {"x":3, "y":5}, {"x":4, "y":5}, {"x":5, "y":5}, {"x":6, "y":5}, {"x":7, "y":5}, {"x":8, "y":5}, {"x":9, "y":5}, {"x":10, "y":5}, {"x":11, "y":5}, {"x":12, "y":5}
+ ]
+ }
+ }
+}
diff --git a/keyboards/pos78/keymaps/default/keymap.c b/keyboards/pos78/keymaps/default/keymap.c
new file mode 100644
index 000000000..9d4b43001
--- /dev/null
+++ b/keyboards/pos78/keymaps/default/keymap.c
@@ -0,0 +1,45 @@
+/* Copyright 2020 smssmssms
+ *
+ * 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 .
+ */
+#include QMK_KEYBOARD_H
+#include "keymap_uk.h"
+
+// Defines names for use in layer keycodes and the keymap
+enum layer_names {
+ _BASE,
+ _FN
+};
+
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+ /* Base */
+ [_BASE] = LAYOUT_ortho_6x13(
+ KC_ESC, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, KC_BSPC, KC_DEL,
+ UK_GRV, UK_1, UK_2, UK_3, UK_4, UK_5, UK_6, UK_7, UK_8, UK_9, UK_0, UK_MINS, UK_EQL,
+ KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, UK_LBRC, UK_RBRC,
+ KC_CAPS, KC_A, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, UK_SCLN, UK_QUOT, UK_HASH,
+ KC_LSFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_N, KC_M, UK_COMM, UK_DOT, UK_SLSH, UK_BSLS, KC_RSFT,
+ KC_LCTL, KC_LGUI, KC_LALT, XXXXXXX, KC_SPC, TG(_FN), KC_MUTE, KC_ENT, KC_ALGR, KC_RGUI, KC_MENU, KC_HOME, KC_END
+ ),
+
+ [_FN] = LAYOUT_ortho_6x13(
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ KC_SLEP, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_F11, KC_F12,
+ _______, XXXXXXX, KC_WAKE, KC_MYCM, XXXXXXX, XXXXXXX, KC_AGAIN, KC_VOLU, KC_INS, KC_PWR, KC_PSCR, XXXXXXX, KC_PGUP,
+ _______, XXXXXXX, XXXXXXX, XXXXXXX, KC_FIND, XXXXXXX, KC_HELP, KC_VOLD, KC_CALC, KC_BRIU, XXXXXXX, KC_UP, KC_PGDN,
+ _______, KC_UNDO, KC_CUT, KC_COPY, KC_PASTE, RESET, XXXXXXX, KC_MAIL, UK_COMM, KC_BRID, KC_LEFT, KC_DOWN, KC_RIGHT,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______
+ )
+};
diff --git a/keyboards/pos78/keymaps/default/readme.md b/keyboards/pos78/keymaps/default/readme.md
new file mode 100644
index 000000000..c313876fc
--- /dev/null
+++ b/keyboards/pos78/keymaps/default/readme.md
@@ -0,0 +1 @@
+# The default (UK) keymap for pos78
diff --git a/keyboards/pos78/pos78.c b/keyboards/pos78/pos78.c
new file mode 100644
index 000000000..f2e98aba0
--- /dev/null
+++ b/keyboards/pos78/pos78.c
@@ -0,0 +1,17 @@
+/* Copyright 2020 smssmssms
+ *
+ * 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 .
+ */
+
+#include "pos78.h"
diff --git a/keyboards/pos78/pos78.h b/keyboards/pos78/pos78.h
new file mode 100644
index 000000000..2d5681add
--- /dev/null
+++ b/keyboards/pos78/pos78.h
@@ -0,0 +1,43 @@
+/* Copyright 2020 smssmssms
+ *
+ * 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 .
+ */
+
+#pragma once
+
+#include "quantum.h"
+
+/* This is a shortcut to help you visually see your layout.
+ *
+ * The first section contains all of the arguments representing the physical
+ * layout of the board and position of the keys.
+ *
+ * The second converts the arguments into a two-dimensional array which
+ * represents the switch matrix.
+ */
+#define LAYOUT_ortho_6x13( \
+ k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k10, k11, k12, \
+ k13, k14, k15, k16, k17, k18, k19, k20, k21, k22, k23, k24, k25, \
+ k26, k27, k28, k29, k30, k31, k32, k33, k34, k35, k36, k37, k38, \
+ k39, k40, k41, k42, k43, k44, k45, k46, k47, k48, k49, k50, k51, \
+ k52, k53, k54, k55, k56, k57, k58, k59, k60, k61, k62, k63, k64, \
+ k65, k66, k67, k68, k69, k70, k71, k72, k73, k74, k75, k76, k77 \
+) { \
+ {k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k10, k11, k12}, \
+ {k13, k14, k15, k16, k17, k18, k19, k20, k21, k22, k23, k24, k25}, \
+ {k26, k27, k28, k29, k30, k31, k32, k33, k34, k35, k36, k37, k38}, \
+ {k39, k40, k41, k42, k43, k44, k45, k46, k47, k48, k49, k50, k51}, \
+ {k52, k53, k54, k55, k56, k57, k58, k59, k60, k61, k62, k63, k64}, \
+ {k65, k66, k67, k68, k69, k70, k71, k72, k73, k74, k75, k76, k77} \
+}
diff --git a/keyboards/pos78/readme.md b/keyboards/pos78/readme.md
new file mode 100644
index 000000000..3a85518a0
--- /dev/null
+++ b/keyboards/pos78/readme.md
@@ -0,0 +1,17 @@
+# pos78
+
+
+
+* Keyboard Maintainer: [smssmssms](https://github.com/smssmssms)
+* Hardware Supported: ATMEGA 32U4 (Adafruit Itsy Bitsy 5v)
+* Hardware Availability: 1980-90's version of the [Partner Tech Corp KB-78](https://www.partner.com.tw/wp-content/uploads/2019/09/KB-78-G-78-1-190911.pdf); a 78 key Point-Of-Sale ortholinear keyboard conversion
+
+Make example for this keyboard (after setting up your build environment):
+
+ make pos78:default
+
+Flashing example for this keyboard:
+
+ make pos78: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).
diff --git a/keyboards/pos78/rules.mk b/keyboards/pos78/rules.mk
new file mode 100644
index 000000000..5c0d8f307
--- /dev/null
+++ b/keyboards/pos78/rules.mk
@@ -0,0 +1,22 @@
+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+BOOTLOADER = atmel-dfu
+
+# Build Options
+# change yes to no to disable
+#
+BOOTMAGIC_ENABLE = lite # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = yes # Mouse keys
+EXTRAKEY_ENABLE = yes # Audio control and System control
+CONSOLE_ENABLE = no # Console for debug
+COMMAND_ENABLE = no # Commands for debug and configuration
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = no # USB Nkey Rollover
+BACKLIGHT_ENABLE = no # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no # Enable keyboard RGB underglow
+BLUETOOTH_ENABLE = no # Enable Bluetooth
+AUDIO_ENABLE = no # Audio output