Does any one have info on nes mother board revisions? Looking for nes-cpu-4

[acem77]

I have a rgb modded nes but the powerpak does not work on it.
I just modded a nes for someone else and the powerpak does work on that nes.

The nes that works with the powerpak has a mother board rev nes-cpu-4 and its serial is around 1,280,000.

My nes that does not work has a mother board rev nes-cpu-7 and its serial is
around 11,000,000.

I hope that the serial number will help me predict what rev of mother board.

does any one have the real details on how nes serials tie in with the rev of nes mother boards

thanks

[rbudrick]

Acem, where on the motherboard is the rev number displayed? Perhaps people could post what serial and rev number they have.

-Rob

[acem77]

i just bought a nes that was on ebay.
Its serial is N1,394,910 and it has a Ver 4 Mother board.
The guy was nice enough to take it a part and take pics for me.


i am now looking into a way to make it have both ppus on a switch.

[Jorpho]

Maybe you just need to snip one of the pins of the 10NES chip? I thought one of the major hardware revisions had something to do with that (hence the A-B switch on the Camerica games).