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Via the Facebook post... There's a gentleman that was able to obtain the original board drawings and etc from PPS and he will be releasing boards to original WPC specs.
I for one with a wpc89/95 games, will be in on that as my four month old rottondog needed to be repaired already.
Quoted from DumbAss:Original specifications is not always better.
A good example of this is the System 9 / System 11 lamp column drives. Another example is the use of linear voltage regulators that generate a lot of heat.
Also ... not all WPC boards are 100% compatible / interchangeable. For example ... during the course of production Williams changed the resistor and capacitor values of some board components rendering boards with identical layout and components not 100% interchangeable due to the value changes. This was specifically done in the sound mixing sections between the System 11A and System 11B CPU boards as well as the pre-fliptronic WPC sound and fliptronic WPC sound boards.
I'm just the messager. I'm would assume some upgrades would be made along the way... But I'll take a new original PCB over no PCB.
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