Basic MMC1 board

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Price $7.25 $7.00

NES SxROM Basic (Black)

Basic MMC1 board.

Out of stock

AX5904 (MMC1)

AX5904 is a MMC1 clone

In stock

Insufficient stock

SKU: NES_SxROM_Basic Categories: , ,


Stock Notice

When current stock is depleted there are no plans to produce more.

NES SxROM Basic Board

The NES SxROM Basic is a homebrew or reproduction board that supports MMC1 mappers (Mapper 1) that don’t need WRAM or a battery.

Component List

MMC1 – AX5904 MMC1 Implementation (INCLUDED)

PRG – 27C512/27C010/27C020/29F010/29F020 or compatible (Not Carried)

CHR – 27010/27C020/29F010/29F020 or compatible (Not Carried)

Lockout Chip – AVRCIC (HERE)

C1 – 22uf 16V Capacitor (HERE)

C2,C3 – 0.1uf 50V Capacitor (HERE)

Mapper Compatibility

Verified compatible with SLROM and SGROM mapper types. Please note that other mappers have not yet been tested.


Build instructions/tutorials aren’t available at this time. If you are uncomfortable or new to building your own cartridges please wait for tutorials to become available.

Additional information

NES SxROM Basic (Black)

Weight 0.0350 lbs
Dimensions 4.02 × 2.3 × 0.055 in


AX5904 (MMC1)

Weight 0.00625 lbs
Dimensions 1.3 × 0.4 × 0.35 in


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