Simple to use MSX 2x32K Cartridge Board, 100% compatible with original hardware.

Materials needed:

IC1: 27C512 or 27C256 DIP28 Eeprom memory

C1: 10uF 16V Electrolytic Capacitor

R1: 10K 1/4W Axial Resistor

JP1: 3-pin-Header

A, B, A+B: 2-pin-Header

How to make a 2-in-1 32K Cartridge:

-Divide the 32K ROMs in 2 blocks of 16K and swap the blocks to obtain a swapped 32K file.

-Join the 2 swapped 32K ROMs into a 64K file and burn it on the 27C512 EEPROM memory.

-Include C1, R1, and use JP1 to select between ROM1 and ROM2.

-One of 3 (A, B, or A+B) must be closed.

How to make a single 32K Cartridge:

-Divide the 32K ROMs in 2 blocks of 16K and swap the blocks to obtain a swapped 32K file and burn it on the 27C512 EEPROM memory. (27C256 may be used instead of 27C512).

-Include C1.

-Close the first two pins of JP1.

-One of 3 (A, B, or A+B) must be closed.

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Check my other shared projects:

-MSX Cartridge

-ColecoVision Cartridge

-Sega Master System Cartridge