Erik van Son MMC/SD Drive v2
This page was last modified 15:19, 20 May 2021 by Mars2000you. Based on work by Gdx and Pentarou.



Erik van Son MMC/SD Drive v2 was made with the circuit diagram of the MMC/SD Drive v2 released by Sharksym. The board uses a CPLD to emulate the Konami mapper and Sharksym's circuit. The SCC sound is not emulated in this version.


Erik van Son MMC/SD Drive v2
Erik van Son MMC/SD Drive v2 back

Minimum Requirements

  • MSX1 with the Disk-Rom v1 or MSX2 with the Disk-Rom v2.20
  • 64kB RAM when Disk-Rom v1 or 128kB when the Disk-Rom v2.20
  • 1 cartridge slot free


  • 1 or 2 microSD slot (MicroSD up to 256MB in FAT12 and 2GB in FAT16)
    • FAT 12/16 partitions (FAT16 is supported by patched MSX-DOS2 only)
  • Flash ROM: 512kB
  • Support R800 ROM/DRAM mode on MSX Turbo R and Panasonic MSX2+ turbo mode


  • Flash Rom can be used for the following features
    • 128kB reserved for its Disk-ROM (Bios, Basic extensions, kernel and internal software)
    • Bootable ROM-Disk up to 384kB
    • MegaFlashRom up to 336kB (RomMappers: ASCII, Konami, Plain Rom up to 48kB with multi-Rom support)