MSX Club Gouda Memory Mapper 1MB
This page was last modified 03:58, 10 August 2022 by Mars2000you. Based on work by Gdx and Rderooy and others.



This cartridge is a handy expansion to enlarge your computers memory. It contains a Memory Mapper of 1MB (1024kB).

Two other versions from MSX Computer Club Gouda were available in sizes of 2 MB and 4 MB. All are compatible with 7 MHz upgrade kit and MSX Turbo R modes.

It also works from slotexpander. It was sold in a Konami sized cartridge.


MSX Computer Club Gouda Memory Mapper front cartridge
MSX Computer Club Gouda Memory Mapper upside cartridge
MSX Computer Club Gouda Memory Mapper back cartridge

Minimum System Requirements

  • MSX2 computer, one free slot cartridge

Note: As all standard Memory Mapper, this cartridge is not supported by MSX1 computers except with Nextor or a MSX-DOS2 unbridled (like Sunrise CF interface). On MSX1 without Nextor, we need to manually initialize pages order of the mapper from basic before it can be used.


  • BMMS (Bigger Memory Mapper Selector)
  • CHKMEM.BIN (Utility that displays the slot of RAM, Memory Mapper and MegaRAM by LARK)
  • Mapper Info (by Yukke)
  • MEGA16.COM (loader for megaroms with 16k mapper)
  • MEMTEST.COM (RAM of Memory Mapper tester by Masatoshi Fujimoto)
  • TESTMAP.COM (RAM of Memory Mapper tester by Marteen)
  • SofaRom (MegaRoms and Roms loader by Louthrax)