SNES 1-chip - messed up SuperCIC install - S-CPUN pinout question

[Freedy]

Hello,

I've got a PAL 1-chip with a messed up SuperCIC + uIGR (borti version with the deJitter integrated) install

The SNES did not even turned on when I got it.

I could fix everything, and thats the point I should have stopped probably. The original modder lifted PIN 110, too on the S-CPUN, not just pin 111 and used a quite long uninsulated wire to jump the pin and the pad. I wanted to clean it up by removing the wire and bending the pin back, but unfortunately the pin broke.

I tried to look for 1-chip schematics or S-CPUN pinout but I have not found any so far. I did a quick test with 2 games, and seemingly the snes works just fine.

Do you have info what pin 110 is for? Can it stay as is, or should I get for example a dremel and replace the broken leg?

[Lee]

There's a schematic available for the PAL 1chip here: https://videogameperfection.com/forums/ ... -pal-snes/

It looks like pin 110 connects to the +5V rail. There are several other pins on the CPU that connect to it as well, maybe you could check for continuity between pad 110 on the board and the other pins. If theres a little bit of exposed metal left on the broken pin you could check for continuity there as well and if there is it's likely fine the way it is IMO.

[Freedy]

Thank you very much Lee for the schematics and advice!

I checked continuity between pin 101 and the exposed leftover metal of pin 110 and the multimeter beeped.

I hope it will be fine, the system belongs to an acquaintance. It seems pretty extreme, that the leftover pins/internal lines of 5V supply would get so hot because of taking over the load from pin 110 that something bad would happen. but also I don't have experience with designing ICs and their power delivery circuitry, so who knows