The PSI Comp 80 was a home computer sold by Powertran starting in 1979. It was sold in the form of a kit of parts for a cased single-board home computer system.
The system was based on a Z80 microprocessor addressing a mixture of 8 KB of system RAM and EPROM, plus 2 KB of video RAM.
It used a National Semiconductor MM57109N as a mathematical co-processor to speed up calculations.