Williams Sys-6 (or other) Sound Board Sound Rom info ?????

[Marty Machine]

Hi all,

I'm looking for info about Williams Sys-6 (or other Sys') Sound Board Sound Rom.

Looking at the schematic, i find it hard to believe that a 512byte rom is generating all the sounds.
A switch selects between "tone/boing" sounds and "synth" sounds, yet i can't see how this is done for so many sounds in the game?
It looks like the rom patterns feed into a D-A chip to produce the analog audio out to speaker amp.

Does anyone have info or memory maps of how the sounds are mapped in these roms etc? any links i should look at?

The reason i ask, is that i wanted to either replace some sound FX, or at least add background music into my pinnie, which might be as simple as mixing the audio internally anyway.

Marty.

[Strangeways]

The Pinball "Bible" ;

http://www.pinrepair.com/sys37/index.htm

Interesting reading 

[Marty Machine]

Hahahaha, everytime i ask a Williams question, i get pointed to that link. 

But really, is IS an excellent guide.

Thanx.

[Strangeways]

Hahahaha, everytime i ask a Williams question, i get pointed to that link. 

But really, is IS an excellent guide.

Thanx.

I usually point pinheads to the marvins guides as I'm not sure of each individuals experience level. so many things are covered there, and it is easier (lazy - I know) to direct to there rather than quote parts of his guides.

[humpalot]

http://pinball.flippers.info/system6resources.asp

http://www.flipper-pinball-fan.be/