Swift Disc 2 - Sixword


SCHEME MAIN BOARD

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MAIN BOARD

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SCHEME ADDITIONAL BOARD

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ADDITIONAL BOARD
   The additional board have a wire betheen pin1 of IC6 74HCT74 and pin1 of IC4 74HCT74.The pin 1 was originally conneted to pin 15 of the same chip but the track is cut manually indicating an original design bug.

PAL 16L8 "DEC1"

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PAL 16L8 "DEC2"

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PAL 16L8 "DEC3"

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