The Picodidac 80 was one of the early microcomputers developed by the French company Léanord in the late 1970s. It was based on the Intel 8085 microprocessor and was primarily designed for automation and machine code learning.

Léanord, founded in 1960, produced several notable computers, including the Picolog 8 and Picolog 80, which were based on Intel 8008 and 8080 microprocessors, respectively1. The Picodidac 80 was part of this series and contributed to the early development of microcomputing in educational and industrial settings.

The Intel 8085 microprocessor is produced by Intel in 1976. It is software-binary compatible with the Intel 8080, with two instructions added to support the newly added interrupt and serial I/O features.

The CPU requires less support circuitry, allowing foa a simpler and less expensive production process. The "5" in the 8085 signifies the single +5 volt power supply that is needed to power the CPU. In comparison the 8080 needed +5V, -5V and +12V in order to run.

The 8085 uses a multiplexed address/data bus (AD0 through AD7). Intel introduced several support chips with this address latch built in, such as the 8155 RAM chip, and I/O chips. This architecture reduced the number of traces between the 8085 and supporting memory and I/O chips.

The Zilog Z80 eclipsed both the 8080 and the 8085 in capabilities and added instructions. But thanks to the built-in serial I/O and five prioritized interrupts, the Intel 8085 played a large role as a controller in many products.