When I received this board and saw the missing chips, I threw it to the box as marked "for parts", but my seventh sense told me, that I have to give it a last chance.
I had some time to install the chips in sockets and make a jamma adapter yesterday.
Fired it up
Yeah, image is ok.
Tried to put some credits in it, but nothing happened.
Followed the traces and checked everything again, same result.
I double checked the pinout chart and realized, that there is no P1 start pin indicated in it and there is a pin called "unknown".
Soldered the credit wire to "unknown" and P1 start to Cion 1 and gave it another try.
Everything works fine including sound and controls.
Seems like the pinout chart is incorrect in all arcade websites, if anybody wants to make an adapter, this is the correct one:
PARTS SOLDER
gnd B1 A1 gnd
1p right B2 A2 2p right
1p left B3 A3 2p left
1p up B4 A4 2p up
1p down B5 A5 2p down
1p fire B6 A6 2p fire
- B7 A7 -
P1 start B8 A8 P2 start
- B9 A9 -
coin1 B10 A10 coin2
speaker + B11 A11 speaker -
- B12 A12 -
minus 5v B13 A13 minus 5v
plus 12v B14 A14 plus 12v
plus 5v B15 A15 plus 5v
plus 5v B16 A16 plus 5v
gnd B17 A17 gnd
gnd B18 A18 gnd
Thanks for everybody who helped me to bring back life this great game.
