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This board was essential for all NASCOM-1 owners who wanted to expand their systems. I doubt that he NASCOM-1 was ever intended to become as popular as it did. The designer(s) didn't include sufficient on-board buffering to drive a bus system. Hence the introduction of this board. The three grey ribbon cables terminated in an edge connector to fit the NASCOM-1. The card was then plugged into the first slot of the motherboard and so connected the necessary signals.

This board also produced a "clean" reset pulse so that the system monitor could be restarted without losing data and programs currentl in memory.

A further circuit was a replacement clock pulse generator (the main system timing signal) which allowed use of some of the more advanced ICs.