petsematary125
New member
I recently got my Wonder Boy PCB mostly working (it crashes at random, but I think this is due to corroded sockets which I plan to clean or replace), but I am unsure of where exactly this green wire is supposed to be soldered.
One end is connected to the Sega 315-5012 chip on pin 6, the other is seemingly supposed to be connected to a pin on IC51, an M74LS257AP. However, the 74LS end of the wire was detached, so I am not sure which pin it is supposed to be connected to. I believe this is a factory installed wire since I see some other boards which have the exact same mod, the problem is I can't clearly discern which pin it is supposed to be soldered to.
As best I can tell from another boardest that I can find online, it appears to be pin 1, but again, I can't tell for sure.
The board seems to run with it attached to pin 1, though I don't know if an incorrect connection could be a possible cause of the random crashes.
Any help would be appreciated, as it seems like it is a bit difficult to find clear photos of this PCB model running Wonder Boy.
One end is connected to the Sega 315-5012 chip on pin 6, the other is seemingly supposed to be connected to a pin on IC51, an M74LS257AP. However, the 74LS end of the wire was detached, so I am not sure which pin it is supposed to be connected to. I believe this is a factory installed wire since I see some other boards which have the exact same mod, the problem is I can't clearly discern which pin it is supposed to be soldered to.
As best I can tell from another boardest that I can find online, it appears to be pin 1, but again, I can't tell for sure.
The board seems to run with it attached to pin 1, though I don't know if an incorrect connection could be a possible cause of the random crashes.
Any help would be appreciated, as it seems like it is a bit difficult to find clear photos of this PCB model running Wonder Boy.
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