JCM-1 – A Custom 8-Bit Computer

Follow along as I build JCM-1: a Custom 8-Bit Computer. Watch as I teach myself how to design and build it, on the fly, through trial and lot of error.

Episode List »

Looking for something from one of my project episodes? Hit the links below to get right to the episode notes and downloads.

  1. Prelude
  2. Let’s Build an 8-Bit Computer!
  3. Free Running
  4. ROM If You Want To
  5. Serial Killer
  6. Uhura is busy, I am “Monitoring”
  7. Sound And Fury
  8. Moving in Stereo
  9. The Keymaster
  10. Freeze Frame
  11. NTSC Generator – Project Restart
  12. NTSC Generator – Composite Horizontal
  13. NTSC Generator – Composite Vertical
  14. NTSC Generator – Pixel Timing
  15. NTSC Generator – Video Generation

Episode 0 – Prelude »


Episode 1 – Let’s Build an 8-Bit Computer! »

Downloads

Episode 2 – Free Running »

Downloads
  • None

Episode 3 – ROM If You Want To »

Downloads

Episode 4 – Serial Killer »

Downloads

Episode 5 – Uhura is busy, I am “Monitoring” »

Downloads

Episode 6 – Sound and Fury »

Downloads

Episode 7 – Moving in Stereo »

Downloads

Episode 8 – The Keymaster »

Downloads

Episode 8.1 – Update »

Downloads

Episode 8.2 – Update »


Episode 8.3 – Update »


Episode 8.G – Game Update »


Episode 9.0 – Freeze Frame »


Episode 10 – NTSC Video Restart »


Episode 11 – Horizontal Timing »


Episode 12 – Vertical Timing »


Episode 13 – Pixel Timing »


Episode 14 – Video Generation »

NTSC Video Generator Schematic