From Milkymist Wiki

[edit] Hardware

• Design like Turtelizer with both JTAG and UART in one cable
• 2.5V JTAG, 3.3V UART
• Proper connectors and pinouts - check the Milkymist One schematics
• Chip: FT2232H - we want a fast JTAG

[edit] Software

• UrJTAG (supports indirect programming of the flash with FJMEM)
• xc3sprog
• Update JTAG firmware on Windows
• JTAG windows driver

• Build the libftdi-1.0 and new ftdi_eeprom from git [1]
• Update JTAG firmware under linux Working ftdi_eeprom