diff --git a/Manganese OS/LED.py b/Manganese OS/LED.py
new file mode 100644
index 0000000..8002d3c
--- /dev/null
+++ b/Manganese OS/LED.py	
@@ -0,0 +1,19 @@
+from machine import Pin, I2C
+
+LED1 = Pin(16, Pin.OUT)
+LED2 = Pin(17, Pin.OUT)
+
+def green():
+    LED2.on()
+
+def red():
+    LED1.on()
+    
+def off(c):
+    if c == "g" or c == "green":
+        LED2.off()
+    elif c == "r" or c == "red":
+        LED1.off()
+    else:
+        LED1.off()
+        LED2.off()
\ No newline at end of file
diff --git a/Manganese OS/calculator.py b/Manganese OS/calculator.py
new file mode 100644
index 0000000..32e46fa
--- /dev/null
+++ b/Manganese OS/calculator.py	
@@ -0,0 +1,12 @@
+import var
+import gen
+import time
+
+
+#This'll get done one century
+
+def run():
+    gen.cls()
+    var.oled.text("Coming soon",0,0)
+    var.oled.show()
+    time.sleep(5)
\ No newline at end of file
diff --git a/Manganese OS/gen.py b/Manganese OS/gen.py
new file mode 100644
index 0000000..969e71c
--- /dev/null
+++ b/Manganese OS/gen.py	
@@ -0,0 +1,10 @@
+import var
+
+
+
+def cls():#clear screen   
+    var.oled.fill(0)
+    var.oled.show()
+    
+def smm(inp):#system_menu_master
+    eval(inp + "()")
\ No newline at end of file
diff --git a/Manganese OS/main.py b/Manganese OS/main.py
new file mode 100644
index 0000000..6ff4fbf
--- /dev/null
+++ b/Manganese OS/main.py	
@@ -0,0 +1,240 @@
+from machine import Pin, I2C
+from ssd1306 import SSD1306_I2C
+import time
+import bme280
+import LED #LED systems
+import var #Common variables
+import gen #Generic functions
+
+###APP Imports####
+import calculator #A basic calculator
+import noise_machine #An ultra-basic musical software using the fossdecks internal buzzer
+import test_program #A simple hardware test program
+###/APP Imports###
+
+
+
+# Screen is 128 x 32px
+# Screen runs on gp0(sda) and gp1(scl)
+# Expansion modules run on pins GP3-GP15 (excluding gp9)
+# See pi pico pinout for specific pin capabilities
+# Modules can only be fed 3.n volts. 5 volt module support may be added in the future with a per-port switch.
+# To add an app or module software; Write the module in the dedicated block. In the future apps and module software will be seperate files.
+# This is VERY pre-pre-pre-alpha dev software. Don't expect fantastic functionality. Schematics to the device coming soon.
+# 3D printing files will also be available soon for a shell.
+
+
+
+is_menu = True
+is_app_menu = False
+is_module_menu = False
+
+menu_item = 0
+app_menu_item = 1
+module_menu_item = 0
+
+home_items = ["home", "apps", "modules", "info"]
+app_list = ["home", "calculator.run", "test_program.run", "noise_machine.run"]
+module_list = ["home"]
+
+def startup():
+    var.oled.text("Fossdeck", 16, 0)
+    var.oled.text("Mk0",36,10)
+    var.oled.text("WFX Engineering",0,25)
+    var.oled.show()
+    LED.green()
+    time.sleep(2)
+    gen.cls()
+    var.oled.text("v" + str(var.version), 10, 0)
+    var.oled.show()
+    time.sleep(1)
+    LED.red()
+    time.sleep(0.2)
+    LED.off(0)
+    
+def menu_display():
+    gen.cls()
+    var.oled.text(home_items[menu_item], 44, 0)
+    if menu_item == 0:
+        var.oled.text(">", 118, 22)
+    elif menu_item == len(home_items) - 1:
+        var.oled.text("<", 0, 22)
+    else:
+        var.oled.text("<", 0, 22)
+        var.oled.text(">", 118, 22)
+    var.oled.show()
+
+def menu_nav():
+    global menu_item
+    if var.button1.value():
+        print("up")
+    elif var.button2.value():
+        if menu_item < len(home_items) - 1:
+            menu_item += 1
+            menu_display()
+            time.sleep(0.2)
+    elif var.button3.value():
+        print("down")
+    elif var.button4.value():
+        if menu_item > 0:
+            menu_item = menu_item - 1
+            menu_display()
+            time.sleep(0.2)
+    elif var.button5.value():
+        gen.smm(home_items[menu_item])
+    #todo: Add var.buttons 5-8 and assign functions. On the main menu only 5 does anything (enters into that option)
+            #Creat a function that takes whatever current item is shown, then call that function based on the name.
+            #EG call menu.items[menu_item] + () or something. So if that expression is saay apps, it'll be apps() 
+
+#######################################################################################################
+#APPS BLOCK#########################################################################################
+#######################################################################################################
+def apps():
+    time.sleep(0.2)
+    global is_menu
+    global is_app_menu
+    global app_menu_item
+    global app_list
+    global is_module_menu
+    
+    if is_app_menu == False:
+        app_menu_display()
+    is_app_menu = True
+    is_menu = False
+    is_module_menu = False
+    if var.button1.value():
+        print("up")
+    elif var.button2.value():
+        if app_menu_item < len(app_list) - 1:
+            app_menu_item += 1
+            app_menu_display()
+            time.sleep(0.2)
+    elif var.button3.value():
+        print("down")
+    elif var.button4.value():
+        if app_menu_item > 0:
+            app_menu_item = app_menu_item - 1
+            app_menu_display()
+            time.sleep(0.2)
+    elif var.button5.value():
+        gen.smm(app_list[app_menu_item])
+        if app_list[app_menu_item] is not "home":
+            app_menu_display()
+         
+
+def app_menu_display():
+    gen.cls()
+    var.oled.text(app_list[app_menu_item], 0, 0)
+    if app_menu_item == 0:
+        var.oled.text(">", 118, 22)
+    elif app_menu_item == len(app_list) - 1:
+        var.oled.text("<", 0, 22)
+    else:
+        var.oled.text("<", 0, 22)
+        var.oled.text(">", 118, 22)
+    var.oled.show()
+    
+    
+#######################################################################################################
+#MODULES BLOCK#########################################################################################
+#######################################################################################################
+def modules():
+    time.sleep(0.2)
+    global is_menu
+    global is_app_menu
+    global is_module_menu
+    global module_menu_item
+    global module_list
+    
+    if is_module_menu == False:
+        module_menu_display()
+        is_module_menu = True
+        is_app_menu = False
+        is_menu = False
+    if var.button1.value():
+        print("up")
+    elif var.button2.value():
+        if module_menu_item < len(module_list) - 1:
+            module_menu_item += 1
+            module_menu_display()
+            time.sleep(0.2)
+    elif var.button3.value():
+        print("down")
+    elif var.button4.value():
+        if module_menu_item > 0:
+            module_menu_item = module_menu_item - 1
+            module_menu_display()
+            time.sleep(0.2)
+    elif var.button5.value():
+        gen.smm(module_list[module_menu_item])
+        if module_list[module_menu_item] is not "home":
+            module_menu_display()
+
+def module_menu_display():
+    gen.cls()
+    var.oled.text(module_list[module_menu_item], 0, 0)
+    if module_menu_item == 0:
+        var.oled.text(">", 118, 22)
+    elif module_menu_item == len(module_list) - 1:
+        var.oled.text("<", 0, 22)
+    else:
+        var.oled.text("<", 0, 22)
+        var.oled.text(">", 118, 22)
+    var.oled.show()
+
+#######################################################################################################
+#INFO BLOCK#########################################################################################
+#######################################################################################################
+
+
+def info():
+    gen.cls()
+    LED.green()
+    var.oled.text("v" + str(var.version),0,0)
+    var.oled.text("RP2040 CPU",0,10)
+    var.oled.text("1MB flash",0,20)
+    var.oled.show()
+    time.sleep(5)
+    gen.cls()
+    LED.off(0)
+    menu_display()
+
+
+#######################################################################################################
+#GENERICS BLOCK#########################################################################################
+#######################################################################################################
+
+#Generics that haven't been moved to gen
+
+def home():
+    global is_menu
+    global is_app_menu
+    global is_module_menu
+    is_app_menu = False
+    is_menu = True
+    is_module_menu = False
+    time.sleep(0.2)
+    menu_display()
+    
+
+
+
+#######################################################################################################
+#FLOW BLOCK############################################################################################
+#######################################################################################################
+
+
+startup()
+
+gen.cls()
+
+menu_display()
+
+
+while True:
+    while is_menu:
+        menu_nav()
+    while is_app_menu:
+        apps()
+    while is_module_menu:
+        modules()
diff --git a/Manganese OS/test_program.py b/Manganese OS/test_program.py
new file mode 100644
index 0000000..b1a6ead
--- /dev/null
+++ b/Manganese OS/test_program.py	
@@ -0,0 +1,30 @@
+#App creation for the fossdeck is simple
+#just write the entry point for your software as run()
+#then add appname.run to the apps list on main.py, so in this case test_program.run
+#this will be run as a function when launched.
+#once the app ends, the system will return you to the app or module menu.
+#Don't forget to import your app to main!
+from machine import Pin, I2C
+from ssd1306 import SSD1306_I2C
+import time
+import var
+import LED
+
+
+i = 0
+
+def run():
+    print("print systems OK")
+    var.oled.fill(0)
+    var.oled.text("LED test",0,0)
+    LED.green()
+    LED.red()
+    var.oled.show()
+    time.sleep(3)
+    LED.off("g")
+    time.sleep(1)
+    LED.off("r")
+    var.oled.fill(0)
+    var.oled.text("test complete", 0,0)
+    var.oled.show()
+    time.sleep(3)
\ No newline at end of file
diff --git a/Manganese OS/var.py b/Manganese OS/var.py
new file mode 100644
index 0000000..d117d20
--- /dev/null
+++ b/Manganese OS/var.py	
@@ -0,0 +1,20 @@
+from machine import Pin, I2C
+from ssd1306 import SSD1306_I2C
+import time
+
+i2c=I2C(0,sda=Pin(0), scl=Pin(1), freq=400000)
+oled = SSD1306_I2C(128, 32, i2c)
+button1 = Pin(19, Pin.IN, Pin.PULL_DOWN) #Up
+button2 = Pin(20, Pin.IN, Pin.PULL_DOWN) #Right
+button3 = Pin(18, Pin.IN, Pin.PULL_DOWN) #Down
+button4 = Pin(21, Pin.IN, Pin.PULL_DOWN) #Left
+button5 = Pin(27, Pin.IN, Pin.PULL_DOWN) #Menu_1 / enter
+button6 = Pin(22, Pin.IN, Pin.PULL_DOWN) #Menu_2
+button7 = Pin(28, Pin.IN, Pin.PULL_DOWN) #Menu_3
+button8 = Pin(26, Pin.IN, Pin.PULL_DOWN) #Menu_4
+buzzer = Pin(2, Pin.OUT)
+
+version = 0.1
+
+buzzer_value = 0
+