This product is build to order, usually within 2-5 days

This re-programmable 1 MByte Flash Cartridge allows you to play most Gameboy/Gameboy Colour games including Pokemon (no RTC support), Zelda, Wario Land, LSDJ, etc and allows you to re-flash it with any flash cart programmer like GBxCart RW that supports the MX29F800C. It also allows for some MBC1 games (only on firmware R1 or R1.1) that don't work properly on clone carts such as Super Mario Land 2, Donkey Kong Land 3, Megaman 5 to name a few.

LSDJ users should select the MBC5 only firmware option. Works with GB Studio v1.1.0 with saving if you wish to develop your own game.

This cart works on every GB system - GB, MGB, GBC, GBA, GBA SP and the Game Boy Player.

Check out the cart comparison image to see how each cart compares to each other and the clone carts. Check this list of Gameboy games to see the ROM/RAM size and MBC type your game will have.

Comes in a generic clear or grey Gameboy cartridge with our label. Each unit is assembled in house and is tested on a Gameboy Advance. The PCB finish is ENIG, Gold fingers (on the edge connector) with a 45 degree bevel to give the maximum life for insertion/removal of the cartridge.

Firmware

We have different firmware available for different use cases:

MBC5/3/1 Hybrid (R1) - I want to play a good amount of old and most new games

MBC5/3/1 Hybrid + MBC1 1MB (R1.1) - I want to play more old games and most new games (slightly higher power consumption)

MBC5 only (R1.2) - I only want to play new games and use LSDJ

Check this list of Gameboy games to see the ROM/RAM size and MBC type your game will have.

Once the firmware has been written, it can’t be changed. If you would like to change the firmware version, you can contact us and send the cart back to us for re-programming.

When you place an order, if you would like the flash cart to be programmed with a ROM, you need to supply it to us by messaging us with your link. It will be tested for 20-30 seconds on a Gameboy Advance to ensure it works, if it doesn’t work, we’ll contact you. If you don’t specify a ROM, it will be loaded with the LSDJ Demo.

Specs

ROM: 1MB Flash (MX29F800C)

SRAM: 128KB battery backed with a CR2032 (should last 10 years or more)

MBC: MBC5 (with some MBC1 support) emulated with a Altera CPLD

Note: Having some MBC1 support may break a few MBC5 games. Our MBC5 implementation differs from the standards, switching to bank 0 gives bank 1 like in MBC1/3. Our MBC1 support is limited to 512KB ROM / 8 KBytes RAM, it’s locked in “ROM Banking Mode” but without the 1MB ROM support.

MBC5/3/1 Hybrid (R1): MBC5 – Bank 0 gives bank 1 like in MBC1/3. Hybrid support for MBC1/3 games. MBC1 support is limited to 512KB ROM / 8 KBytes RAM, it’s locked in “ROM Banking Mode” but without the 1MB ROM support. Uses 48mA more compared to a regular cart.

MBC5/3/1 Hybrid + MBC1 1MB (R1.1): Same as R1 but add the 1MB ROM support to the MBC1 implementation (only tested with 1 game). Uses 53mA more compared to a regular cart.

MBC5 only (R1.2): Implements MBC5 without any MBC3/1 detection. Uses 42mA more compared to a regular cart.

This flash cart will take up additional current compared to a regular cartridge due to the CPLD so you will see a decrease in battery life; this is standard for CPLD based flash carts.