Alex Hixon's serial adapter Jamport G4 is a life saver for anyone in need of a serial port on their iMac G4 or PowerMac G4 (all except the first model with PCI graphics). So how does it work? Well, it's a breakout board for the internal serial connector on the motherboard, originally used by the built in modem on said Macs. The breakout board gives you a standard Mac mini-DIN serial port on a PCI bracket to use with your favourite serial device (a serial connected MIDI interface in my case).

Alex recently made the schematics open source and available through a GitHub repository, free for anyone to use and modify. Jamport G4 is still being sold by Alex from his website, but releasing the schematics makes it possible for anyone to pick up the ball if Alex ever decides to stop selling Jamport G4 for whatever reason. Thank you Alex!

If you want to discuss this topic, please do so in this forum thread.