NES SxROM Advanced


Advanced MMC1 board with save capability.

Discount per Quantity

Quantity 10 - 49 50+
Price $9.25 $9.00

NES SxROM Advanced (Black)

Advanced MMC1 board with save capability.

In stock

AX5904 (MMC1)

AX5904 is a MMC1 clone

In stock

SKU: NES_SxROM_Advanced Categories: , ,


NES SxROM Advanced Board

The NES SxROM Advanced is a homebrew or reproduction board that supports MMC1 mappers (Mapper 1) and supports WRAM with save support.

Component List

MMC3 – AX5904 MMC1 Implementation (INCLUDED)

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

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

WRAM – 6264/62256 SRAM (6264 HERE) (62256 HERE)

Lockout Chip – AVRCIC (HERE)

C1,C4 – 22uf 16 V Capacitor (HERE)

C2,C3 – 0.1uf 50V Capacitor (HERE)

D1,D2 – 100V 300MA Diode – 1N4148-T50A (HERE)

R1,R2 – 10K Ohm Resistor (HERE)

R3 – 27K Ohm Resistor (Optional) (COMING SOON)

Battery – CR2032 Battery with tabs (COMING SOON)

Mapper Compatibility

Verified compatible with SLROM, SGROM, SKROM, and SNROM 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 Advanced (Black)

Weight0.039375 lbs
Dimensions4.02 × 3 × 0.055 in


AX5904 (MMC1)

Weight0.00625 lbs
Dimensions1.3 × 0.4 × 0.35 in


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