I want to mod my 1-chip PAL SNES for "permanent" 60hz video output.
Doing this process on an original SNES revision seems to be well-documented, but info on doing with a 1-chip revision seems to be rather sparse
From what I've gathered reading forum posts and mod tutorials and videos, lifting pins 24 and 30 on PPUs 1 and 2 respectively, then bridging them to ground, seems to be all that is needed to boot the console in 60Hz mode. I have also seen some info that describes a similar process on 1-chip consoles that involves doing the same for pin 111 on the sCPU.
Since the process is easily reversible, I attempted this last night. Unfortunately, I did not get the result I was hoping for. Instead, I now get no signal at all. It even causes my retroTINK 2x to stop outputting video signal when the console is powered on.
I went over my work again and the solder joints are clean, and nothing appears bridged. Adjacent pins on the sCPU are also fine. I can reverse the process and solder the pin pack to the board again, but when I disconnected the lifted pin 111 from ground, the console actually still booted fine with the pin lifted and not connected to anything. Of course I didn't attempt to play a full game or anything, but it's interesting that it still worked with the pin lifted.
Some quick info on my setup:
RetroTINK 2x HDMI via HDRetrovision YPbPr component cable. FX Pak Pro flash cart.
TV is a cheap TCL 50-inch. Composite-in is handled via a 3.5mm adapter, and will not detect a raw 240p signal from any console.
All of my NTSC retro consoles work fine on this setup including my original North American SNES. The PAL SNES was also tested working on this setup before attempting to mod.
Any and all help(and tolerance of my ignorance) is greatly appreciated.
Doing this process on an original SNES revision seems to be well-documented, but info on doing with a 1-chip revision seems to be rather sparse
From what I've gathered reading forum posts and mod tutorials and videos, lifting pins 24 and 30 on PPUs 1 and 2 respectively, then bridging them to ground, seems to be all that is needed to boot the console in 60Hz mode. I have also seen some info that describes a similar process on 1-chip consoles that involves doing the same for pin 111 on the sCPU.
Since the process is easily reversible, I attempted this last night. Unfortunately, I did not get the result I was hoping for. Instead, I now get no signal at all. It even causes my retroTINK 2x to stop outputting video signal when the console is powered on.
I went over my work again and the solder joints are clean, and nothing appears bridged. Adjacent pins on the sCPU are also fine. I can reverse the process and solder the pin pack to the board again, but when I disconnected the lifted pin 111 from ground, the console actually still booted fine with the pin lifted and not connected to anything. Of course I didn't attempt to play a full game or anything, but it's interesting that it still worked with the pin lifted.
Some quick info on my setup:
RetroTINK 2x HDMI via HDRetrovision YPbPr component cable. FX Pak Pro flash cart.
TV is a cheap TCL 50-inch. Composite-in is handled via a 3.5mm adapter, and will not detect a raw 240p signal from any console.
All of my NTSC retro consoles work fine on this setup including my original North American SNES. The PAL SNES was also tested working on this setup before attempting to mod.
Any and all help(and tolerance of my ignorance) is greatly appreciated.
Statistics: Posted by kind2311 — Sat Jun 15, 2024 3:33 pm — Replies 6 — Views 265