VECTORLIST - The Mailing List For The Technical Discussion of Vector-Based Arcade Games

May_1997
Re: G80 speech board

From: Al Kossow ( )
Date: Mon May 05 1997 - 16:25:57 CDT

There are spare bussed lines on the backplane. The I/O decodes can be
picked off just after the I/O address decoder on each sound board and
brought down to three unused bussed lines on the backplane. Decode the
I/O adr for the sound board on the CPU card based on I/O adr and desired
sound card. You also have to mix the outputs of the speech and the three
sound cards together, which could be done on the new CPU card.

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