Need Help to Install Modchip on VA13 Brazilian Tectoy

[willtsan]

Recenty I purchased a "Universal Modchip V3" and ended with a different version. I Installed on my Saturn (VA13, Brazilian Tectoy version, rounded buttons, 21 flat) and all games, even originals, boot only as music cds.

I read somewhere that I need a wire on pin 14 in the 32 pin chip in cd board, but I don't know where to put the wire in the modchip.

Putting the 5v wire on the cd board does nothing.

If a start with the cd tray opened, then closes it, original games boot as there is no modchip installed, which is really weird.

Can somebody help me with this?

Edit: I can swap disks and play backups, but is really hard to do on a model 2.

[zyrobs]

VA10 and later consoles do not have a signal clock supplied by the CD drive, they use a different clock sent by the console, so the only modchips that work on those boards are ones that have an onboard crystal to generate their own signal clock.

That modchip seems to have one though, but it seems to me that it tries tapping the signal from the ribbon instead (which is a different signal in your console, so, incompatible with the modchip). The ribbon pin in question is pin 1, you need to replace that with the 8MHz signal coming from the CD board.

I'd try this:

cut the trace at the red marker, and solder the signal cable to the circled solder point. Note that if you do this the chip will most likely not work with earlier motherboards unless you undo this.

Also when you solder the +5V cable, solder it to a +5V point on the CD drive and not the power supply.

It seems the chip lacks the 7404 which is used for inverting/buffering the signal, so there's a chance that it won't work regardless.

[willtsan]

Thanks! I did all that and didn't work, so I guess this modchip is incompatible.