What Is the Gigatron TTL? A Computer With No Microprocessor Explained

What if you built a working computer using only basic logic chips — no CPU, no microcontroller, just discrete TTL gates? That's exactly what the Gigatron TTL is. It's one of the most mind-bending projects in the retro computing world, and we carry the kit.

 

What Is the Gigatron TTL?

[A stored-program computer built entirely from 74-series TTL logic, no CPU chip]

 

How Does It Work Without a CPU?

[How the ALU, control logic, and clock work using discrete gates]

 

What Can It Do?

[Built-in games, BASIC interpreter, VGA output, PS/2 keyboard support]

 

Who Is It For?

[CS students, logic design enthusiasts, retro computing fans]

 

What's in the RetroMakerKits Gigatron Kit?

[PCB, all components, assembly notes, documentation link]

 

Build Tips

[Common assembly gotchas, testing approach]

 

[Shop Gigatron TTL Kit] [View Documentation]