Giga Wing CPS2 board question

PCB problems and fixes
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neoretro75
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Giga Wing CPS2 board question

Post by neoretro75 »

Hi all,

Just bought a Giga Wing CPS2 board from a Yahoo Japan seller. While inspecting the battery, I noticed that there is a cable soldered on two pins. I don't have a clue of what it is. Does someone can give me more details on this mod please?

The picture of the board with the cable below.

I'm anxious to know more about this.
Thanks in advance!
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Last edited by neoretro75 on April 8th, 2015, 10:53 am, edited 1 time in total.
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RMRM
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Re: Giga Wing CPS2 board question

Post by RMRM »

I am on the phone and cant see the pic. Cant you post it here directly?
neoretro75
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Re: Giga Wing CPS2 board question

Post by neoretro75 »

I've attached the picture in the post, thanks!
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Re: Giga Wing CPS2 board question

Post by FrancoB »

Looks like a PAL F>G conversion.

Here's some explanation of the mod here courtesy of Walsdawg.

Skip to about 5:10.

neoretro75
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Re: Giga Wing CPS2 board question

Post by neoretro75 »

Ok, thanks for that info and the video!
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RMRM
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Re: Giga Wing CPS2 board question

Post by RMRM »

I would assume that is a factory mod. My Alpha 3 has a wire exactly like that, it even has the same type of duct tape.
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AeroCityMayor
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Re: Giga Wing CPS2 board question

Post by AeroCityMayor »

RMRM wrote:I would assume that is a factory mod. My Alpha 3 has a wire exactly like that, it even has the same type of duct tape.
Yeap, it is!

Cheers,

Ralph.
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neoretro75
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Re: Giga Wing CPS2 board question

Post by neoretro75 »

Thank you everyone for your input. Greatly appreciated.
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Re: Giga Wing CPS2 board question

Post by idc »

Yep, there is a routing error on earlier revision boards that means they're not compatible with PAL G chips. The QSound ROM's low address line is routed to PAL3 pin 9, when it should be the high address line. This factory fix resolves the problem.

If you turn the board over, I'll bet that it's a 93646B-3 (revision 3) or 93646B-4 (revision 4) board.

Later board revisions fixed the routing error.
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