If you decide to keep the board, then send us an email to support at nkcelectronics dot com to receive refund for $22.45. Please include the order number and your contact information in your email. SD2IEC is a hardware mass storage device using an SD/MMC card and interfacing with the IEC bus. It is based on the ATmega644 microcontroller from the Atmel AVR microcontroller family. The most prominent use of SD2IEC is emulation/replacement of a Commodore-1541 disk drive for a C64. Hardware and the microcontroller's firmware is available as open source. (Source: C64 Wiki).

SD2IEC uses firmware also called sd2iec. Firmware version on board: sd2iec-0.9.3-sw2-m644p.

Features

• Separate SD2IEC main and daughter board
• Main board has 3 pin headers with power connections, all IEC signals, device selection switches and 2 LEDs
• Main board measures 64.5mm x 40.8mm x 5.6mm (L x W x H)
• Firmware can be upgraded placing the new firmware file in the root directory of the SD Card (bootloader). Please select firmware for SW2 and ATmega644P

• D64/M2I support (both reading and writing for D64, even with direct sector access using U1/U2)
• T64 is not supported
• PRG/P00 etc. support
• Subdirectory support (CMD command syntax).
• Support for Turbo Disk AKA Fast Load AKA Speeddisk fastloader
• Supports the JiffyDOS fast serial bus protocol
• Supports the Final Cartridge 3 fastloader/fastsaver
• Supports an external "disk change" button
• Supports FAT long file names
• Supports FAT12/FAT16/FAT32 formatted SD cards
• Improved IEC compatibility
  • Supports most typical IEC functions (LOAD, SAVE, OPEN, GET, PUT, CLOSE, ...)
  • 1571 ROM has been taken as reference for implementation
  • Many non-fastloader games run (see znarF's M2I list).

• Changing directories (CMD syntax)
  • OPEN1,8,15,"CD/SOMEDIR/":CLOSE1 - change to SOMEDIR (relative)
  • OPEN1,8,15,"CD//":CLOSE1 - change to root directory
  • OPEN1,8,15,"CD//SOMEDIR/":CLOSE1 - change to SOMEDIR (in root)
  • OPEN1,8,15,"CD:<-":CLOSE1 - go to parent directory (left arrow)
• Using M2Is or D64s
  • OPEN1,8,15,"CD//SOMEDIR/:SOMEGAME.M2I":CLOSE1 - change to/mount SOMEGAME.M2I
  • OPEN1,8,15,"CD//SOMEDIR/:SOMEGAME.D64":CLOSE1 - change to/mount SOMEGAME.D64
  • OPEN1,8,15,"CD:<-":CLOSE1 - leave M2I (left arrow)
• Loading files
  • LOAD"//SOMEDIR/:SOMEFILE" - load SOMEFILE in SOMEDIR (filename gets separated from path using colon)
• mkdir, rmdir see README (online)
  
  Board is based on original design by Shadowolf. Re-engineered by NKC Electronics with revisions by Shadowolf.
  
  

  More information

  
  
  SD2IEC hardware reference
  
  sd2iec firmware reference
  
  sd2iec firmware download page