Homemade S-100 board

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A homemade Altair S-100 expansion on a Vector 8800V bare board. This board appears incomplete as several chip sockets are empty. The function of this board is not currently known.

The function of this particular board was to provide parallel and serial
ports. It used chips scavenged from other equipment hence the abundance
of 'glue' logic.

It was constructed around 1975, but development was soon overtaken by
other more capable equipment.

Owners of the S-100 bus based computers would often construct their own expansions for a variety of functions either from scratch or mail order kits.

Date : 1975

Manufacturer : MITS

Physical Description : Expansion board.

This exhibit has a reference ID of CH50922. Please quote this reference ID in any communication with the Centre for Computing History.