Erik van Son MMC/SD Drive v1
This page was last modified 02:55, 28 May 2021 by Gdx. Based on work by Mars2000you.



Erik van Son MMC/SD Drive v1 was made with the circuit diagram of the MMC/SD Drive released by Sharksym. SCC sound is produced by a chip recovered from a Konami cartridge.


Erik van Son MMC/SD Drive v1
Erik van Son MMC/SD Drive v1 back
Erik van Son MMC/SD Drive v1 in a Sunrise case

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
  • SCC support (using chips from a Konami's SCC cartridge)
  • 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)