Sio2sd - SD/SDHC card reader for Atari 8bit

27.49 EUR
price: |pieces:
26.67 EUR |2+ (3%)
25.84 EUR |5+ (6%)
25.02 EUR |10+ (9%)
24.19 EUR |50+ (12%)

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 Please, read this:  VERY IMPORTANT !


  • SD CARD not included - You can buy it HERE
  • SIO PLUG not INCLUDED - You may get  HERE
  • Most of the games for atari 8bit needs BASIC to be DISABLED - it means You have to press and hold ATARI OPTION KEY at power on.
  • Online manual HERE
  • Increase Your loading speed up to 127kb/s - click HERE
  • Fimware uploaded 3.1 RC2  / customized/






Sio2sd is a device that allows you to load games/applications into 8-bit Atari computers via SIO interface from SD/MMC cards.





Device abilities:



  • Works with SD/MMC (FAT12,FAT16 and FAT32 formats
  • Handles ATR (rw), XFD (ro) and COM/XEX (ro) file types
  • 16x2 LCD display allows to "walk" catalog tree and choose files to load
  • Handles SIO with turbo (allows to set speed index from 1 to 16, default is 6 (69kb/s), in versions 1.x speed index was always 10 (51kb/s))
  • All densities with 128B and 256B sectors, including 16MB disks
  • Handles drives d1 to d8 (up to version 1.2 only d1 to d4 drives were available)
  • Can be configured using ATARI (it's possible to load configuration tool directly from MCU flash memory, so no SD card is needed)





  • You have to format (FAT) SD card using computer
  • In root directory create ATARI folder. In this folder you can place folders and files. This is the start folder for SIO2SD. It's a good idea to use folders with up to about 100 files than one big folder with many, many files.
  • On the first use of a new formatted card SIO2SD will create SIO2SD.CFG file in root directory, where configuration will be stored (files to disks mapping).
  • Note: the directory named ATARI must be present on the card or else SIO2SD won't recognize the card and won't perform the upgrade. 









  • K1: next atari drive (D1,D2,..)
  • K2: next file/folder
  • K3: parent directory (cd ..)
  • K4 (ENTER) : go to folder/map file to current atari drive
  • SHIFT+K2: firmware upgrade
  • SHIFT+k4: turn off current atari drive ("eject disk")





  • sio high speed
    • off
    • hsindex from 1 to 16 (6 is the default setting)
  • cfg tool load (when to override D1 to load configuration program)
    • never
    • startup+shift - only when SHIFT was pressed during startup (power on)
    • every startup
    • no card - only if SD card is not inserted (default setting)
    • shift pressed - SHIFT always cause D1 override (tested on every SIO 'S' command on D1 - available from version 2.2)
  • LED mode (meanig of LEDs)
    • SD read/write - first LED shows SD reads, second LED shows SD writes
    • SIO read/write - first LED shows SIO reads, second SIO writes
    • SD act/SIO act - first LED shows any SD activity, second any SIO activity
  • device id (number of device for SIO2SD.XEX - available from version 2.2)
    • values from 0 to 3
  • write protect (write protection in ATR files - available from version 2.2)
    • never - ATR's are always R/W (write protect flag ignored)
    • obey ATR flag - obey ATR write protect flag - default
    • always - ATR's are always R/O



Inside box:

  •  Sio2sd device with LCD



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