Fractal2000 SD Mapper/Megaram 512KB
This page was last modified 18:16, 26 May 2023 by Mars2000you. Based on work by Gdx and Sd snatcher.



The Fractal2000 SD Mapper/Megaram 512kB is an SD(HC) card interface with dual SD card slots. It features the open source hardware design created by Fabio Belavenuto, and the PCB design was made by MSXpro.

The contacts of the EDGE connector were tin-plated for the very first batches, and are gold-plated for the current production models.

Price: About $120 (free international shipping). This interface is also sold by several people for various prices.

Note that the SD mapper is manufactured by several people. Prices vary between $60 and $120, the quality of manufacture also varies. Tin-plated contacts are more frequent.


Fractal2000 SD Mapper/Megaram 512kB
Fractal2000 SD Mapper/Megaram 512kB PCB

Minimum Requirements

  • MSX1
  • 1 cartridge slot free (primary slot to use the RAM as MegaRAM or RAM expansion)

Attention! This cartridge is not compatible with the Mitsubishi ML-G1 and the Sanyo MPC-100 machines


  • 1 or 2 SD slot (MicroSD up to 32GB)
    • FAT 12/16 partitions (up to 256MB in FAT12 and 4GB in FAT16)
  • Flash ROM: 512kB
  • RAM: 512kB
  • Support R800 ROM/DRAM mode on MSX turbo R and Panasonic MSX2+ turbo mode
  • 1 switch to disable the RAM (This allows the cartridge to be used in a secondary slot)
  • 1 switch to select the RAM configuration (MegaRAM or RAM expansion)


  • The Flash Rom is used for the Disk-ROM and its driver (Nextor)
  • The RAM can de used as RAM expansion or MegaRAM (Supported Rom mappers: ASCII, Konami, Plain Rom).


  • ExecROM - Rom loader
  • LOADROM - Rom loader
  • MI.COM - Mapper info by Yukke
  • MEGA16.COM - Megarom with ASC16 mapper loader
  • MEMTEST.COM - RAM of memory mapper tester by Masatoshi Fujimoto
  • Nextor (Driver is included in the SD-512 Disk-ROM)
  • ODO.COM - Rom loader
  • SDMUPD.COM - SD-512 updater (included software)
  • Sofarun - UI for DSK, MegaROM and ROM loader by Louthrax
  • SymbOS (Driver is included with SD-512 software)
  • TESTMAP.COM - Memory mapper RAM tester by Marteen