NES TxROM Advanced


Advanced MMC3 board with save capability.

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Price $12.50 $12.00

NES TxROM Advanced (Black)

Advanced MMC3 board with save capability.

Out of stock

AX5202P (MMC3)

The AX5202P is a clone of the MMC3 used in TxROM boards.

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Insufficient stock

SKU: NES_TxROM_Advanced Categories: , ,


NES TxROM Advanced Board

The NES TxROM Advanced is a homebrew or reproduction board that supports MMC3 mappers (Mapper 4) and supports WRAM with save support.

Component List

MMC3 – AX5202P MMC3 Implementation (INCLUDED)

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

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

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

Lockout Chip – AVRCIC (HERE)

C1,C4 – 22uf 16V Capacitor (HERE)

C2,C3,C5 – 0.1uf 50V Capacitor (HERE)

C6 – 1000pf Capacitor (Optional*) (COMING SOON)

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 (Not Carried)

Mapper Compatibility

Verified compatible with TLROM, TGROM, TSROM, TKROM, and TNROM mapper types. Please note that other mappers have not yet been tested.

Please note that is only for some games that have a hard time with newer SRAMs (Faster then 120ns). If you are using older SRAM or your game doesn’t have an issue then it is not needed.


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

Weight 0.064375 lbs

NES TxROM Advanced (Black)

Weight 0.05 lbs
Dimensions 4.02 × 3.44 × 0.055 in


AX5202P (MMC3)

Weight 0.014375 lbs
Dimensions 2.2 × 0.75 × 0.35 in


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