Based on BennVenn's DIY Gameboy printer emulator Kit & Palmr's gb-link-cable-breakout
Boards are 1.6mm
Gameboy link cable
2x5 female 2.54mm pitch dual row header / Or solder the stlink header to the board
Modified STlink Dongle
Warning: 1.2 & 1.3 Boards have the wrong pinout, this was fixed in Revision 1.4
Short pads marked "1" for normal operation
Short pads marked "2" to invert Data in & Data Out
Software & Firmware can be found on Bennvenn's website