Program your OSCR

Checking compiler…

Firmware source

Use the latest repository code or choose a release from V15.0 onward. Changing versions resets your configuration and previous build.

Code version

Loading releases…

V15.6 · 10ac9df99a5f

Meet your hardware

Choose the revision printed on your cartridge reader’s PCB.

Hardware revision

Hardware 5LCD display · rotary encoderHardware 4LCD display · rotary encoderHardware 3OLED display · two buttonsHardware 2OLED display · two buttonsHardware 1OLED display · one buttonSerial monitorControl through a serial terminal

Installed modules

Enable only the modules fitted to your reader.

New OSCR rotary displayEnable this if you have the new OSCR branded rotary display. Requires HW4 or HW5.Automatic Voltage SelectionEnable this if you have the VSELECT module.Clock GeneratorDisable this if you don't have the clock generator module.Real Time ClockEnable this if you have the RTC module. You can configure the type later in this file.

Your firmware

V15.6

Built for Arduino Mega 2560

Hardware revision: Choose a revision
Game systems: 6 selected
Build target: ATmega2560 · 16 MHz

Choose your hardware to get started.

Connect your Arduino

Use a USB data cable

Download SD card files (.zip)

USB upload works in desktop Chrome and Edge.

Pick only the systems you need. Enabling too many cores can exceed your reader’s memory.

Open Source Cartridge Reader User Group

From USB to ready to play

Choose the hardware revision printed on your reader and enable its installed modules.
Select game systems and firmware options, then click Build firmware. The server compiles your configuration.
Plug in your Mega 2560 using a USB data cable. Close other apps using its serial port. Click Connect and select its USB serial device.
Click Upload to Arduino. Keep the USB cable connected until writing and verification finish.

Use desktop Chrome or Edge. A hosted installation needs HTTPS and a Node server with Arduino CLI. Your USB port is accessed only by your browser; configuration and compilation run on the server.