This 80-0021 HEX I/O circuit board is a two sided circuit board with two rows of ribbon cable connectors at the extraction end. There are three rows of integrated circuits, the largest of which are socketted. Near the extraction handle there is a module with six LED's.
Manufacturer
Micro-Aide
Identifying Numbers
Model number
80-0021
Etched on the edge of the component side of the board in solder. This number is also found on the solder side.
Other number
REV A
Etched on the edge of the component side of the board in solder
Serial number
SN 4-16-86
In white ink on the solder side of the board at extraction end
