Restoring The E&L MMD-1 Mini-Micro Designer Single-Board Computer From 1977
A YouTube series by [CuriousMarc] and [TubeTimeUS] showcases the restoration of the E&L MMD-1 Mini-Micro Designer, a microcomputer trainer and breadboard for the Intel 8080.
The E&L MMD-1 is notable for being the first ever single-board computer. As mentioned in the video, E&L invented the breadboard with a middle trench for ICs, a feature that has become familiar today, and was granted US patent 228,136 in August 1973.
- Support circuits for control logic
- Clock and bus drivers
- Voltage regulator
- Memory decoder and memory
- I/O decoder
- Keyboard encoder
- Three 8-bit ports
- Octal keyboard
- Other support interconnects
E&L actually invented the breadboard with the middle trench for the ICs
Author summary: Restoration of 1977 E&L MMD-1 single-board computer.