This picture came off Ebay

SandT.JPG

The biggest difference is if the either game uses the sound generator or the PIA exclusively to make sound effects. That and the EPROM size jumpers which are pretty straight forward based on rom size.

So does the sound board you want to put in embryon have the sound generator chip? If so remove the sound generator and install the EE jumpers. Next up figure out if you have to change the ROM size jumpers. There is four jumpers above each rom chip. You set those jumpers to what kind of ROM below you are using. Each ROM scoket has it's own jumpers so you can mix and match.

Can take a better one if required. Had this on my PC for easy access but can go and open up the game again if needs be?

IMG_1641.JPG

Embryon does not use the sound generator chip. Embryon uses the PIA to feed the DAC to make noise. The sound generator has to be removed and EE jumpers added.

If you install that board as is you will only have speech. The PIA will not receive any signal inputs (EE jumps open) and the sound generator will ignore the inputs because the software isnt initializing the sound generator.

If someone on ebay is selling that board as working for embryon, they are wrong.

Andrew

Embryon doesn't have the EE jumper installed, I believe.

I recall there being some misinformation regarding that whether Embryon uses the EE jumper in either the manual or on pinwiki.

Take anything as a grain of salt, through; Barakandl knows Bally hardware like the back of his hand.

The information used to be wrong on pinwiki and elswhere. Back in October last year i wasted a bunch of time trying to figure out why the sound generator wouldn't respond to any inputs. It is because the software doesn't use the sound generator.

The reason that S&T on ebay is jumpered wrong is probably because there are still guides floating around out there with the bad info. Looks like this all started because of a Bally parts manual is wrong.

See my rant on RGP here.
https://groups.google.com/forum/#!searchin/rec.games.pinball/Embryon$20EE/rec.games.pinball/vFdCoKv8gj8/PdEPe11-K6EJ

You set the jumper above the ROM sockets specifically to what the eprom size you are plugging in below.

2532 ROM does not use the x jumper. The U4 jumpers for 2532 is 'U' and 'W'.

ROM Size/Location U2 U3 U4 U5

2532 D&G Q&S U&W Y&AA