Matt Sarnoff wrote in to share his homebrew Ultim809 computer. Based around the slightly unusual Motorola 6809 processor, he’s creating the entire thing from scratch, from designing the circuit to writing his own operating system and games. He’s planning to release the software and schematics for the project when the build is completed, but we want to see them now!

More:

• The MyCPU – Homebrew computer
• Building a CP/M 68k computer from scratch
• Homebrew 68000 computer in the making
• Homegrown modem from days of yore