C1P sound board question

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lowrybt1
Posts: 135
Joined: Sun Mar 08, 2015 3:42 pm

C1P sound board question

Post by lowrybt1 » Thu Aug 10, 2017 1:49 am

I've come across what looks to be a tone generator for the C1P: home made using two IC's: NE555N and UA555TC. There are four wires that look like they should connect to the 600 Board: red and black (power) and white and green. Anyone have thoughts on where the white and green leads might attach? Anyone have thoughts on whether this board/project was documented anywhere? I can only find documentation of a more sophisticated sound card produced by Jeff F.
C4PDF w. 24K, 2 x 5.25 MPI B-51 drives
C1P RevB with fully-populated 610 board and A-13. Klyball D-13.
Spares: 600 Rev.D, 610 board, 540A, A-13 with homebuilt data separator, MPI B-51 logic board (w/o data sep module) and mechanicals

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