Tecnobytes Double RAM
This page was last modified 13:20, 16 January 2021 by Mars2000you. Based on work by Gdx.



The Tecnobytes Double RAM is a cartridge from Brazil customisable as 4096KB Memory Mapper or 2048KB (16Mb) MegaRam with a switch.

It was sold in 2017 for $80 + shipping.


Tecnobytes Double RAM cartridge
Tecnobytes Double RAM cartridge

Minimum System Requirements

  • MSX1 computer, one free slot cartridge


  • 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)