Questions about installing a SuperCIC and IGR in a SNES Mini

I'm about to go about and install a SuperCIC and IGR in my SNES Mini, but there's a few things I'm not too sure about. I assume the wiring should be the same as a regular 1CHIP console, but I've been looking at this page and I've got a couple of questions before I go ahead....

- All the pics I can find of the mod done on 1CHIPs don't have the original CIC or X1 crystal. Do these both require removing?
- I'm confused about the purpose of pin 9 on the CPU, RGB chip and the 50/60Hz module. Can anyone shed any light on this?

Thanks...

 

Pin 9 (if talking about the S-RGB chip you need to lift and wire to) switches the video encoder to ntsc/pal for composite. So you get colour on both.

Original CIC you can remove or replace completely - same as phat snes. If you remove, need the 10k resistor.
X1 needs removing, you need to install the 1chip "addon" to the supercic, so you can basically change which crystal is in use electronically.

 

OK, colour for both regions over composite would be good. I plan on modding it for RGB by amplifying the signals from the CPU and bypassing the RGB chip, so it shouldn't affect that in any way, should it?

I was planning on using the add-on you sent me for 50/60, but there is no solder pad for pin 9. Pins 4 and 11 on the IC7400 look unused, so I assume it shouldn't be a problem to just link them with a wire? One last thing I'm not 100% sure on - is pin 9 of the CPU supposed to connect to the add-on board on the same solder pad X1R? OR do I not need to connect the board to X1R if I'm connecting pin 9 of the CPU?

 

You do not connect anything to pin 9 of the CPU.

Not sure where you have got that from?

You can add a wire to the addon board I sent you (which was a very early test version, but does work OK) to the appropriate leg of the IC as per the 1chip addon schematic.

RGB mod will not cause any problems

 

The thread I linked to in my original post had pin 9 of the CPU marked and also mentions it in relation the to 50/60hz add-on board, I just couldn't figure out why.

 

CPU pin is 111
S-RGB chip is pin 9
and you need to remove X1 and connect to there too

 

Cool - one very last thing: does pin 9 of the RGB chip need to be lifted or not?

 

Yes, you have to lift it.

 

I've finished soldering everything and I'm having issues with it. My PAL game started in colour over composite (I haven't RGB-modded it yet), which was nice, but as soon as I hit reset to try and cycle through video modes it went blank and I haven't been able to get anything to display correctly. It appears to be stuck in 50hz (or at least the red LED isn't ever receiving power). I don't think it's an issue caused by the IGR, although I'll remove it tomorrow to begin troubleshooting it - in the meantime, any ideas what the reason behind the fault could be?

 

which pin did you solder on X1?

 

It's soldered to the + point beneath where the X1 crystal was on the underside of the board.