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hidden0
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Super Gameboy SNES Eprom Mod

by hidden0 Sat Jan 21, 2023 8:46 pm

SO i have this Wild Idea of installing a Eprom or Flash chip with a Rom of Super Gameboy Player 2 on a Super Gameboy i dunno if that will work or not ?

Hardware seems same anybody got any info if that has been done before or if thats even possible ?

Both Bios/Rom Showing LOWROM / 0SRAM

Super Gameboy Player 1
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Super Gameboy Player 2
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Ziggy587
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Re: Super Gameboy SNES Eprom Mod

by Ziggy587 Sat Jan 21, 2023 9:28 pm

Hmm, well what I think is the mask ROM (the chip all the way on the right side of both boards) is a 32-pin IC. So my guess is that it may be the same pinout Nintendo used for their other mask ROMs. And it looks like it may be the same footprint used in other carts such as GSU, so existing adapter might be possible barring any fitment issues (which I think there might be). I would say trace the board out to confirm the pinout of the mask ROM, but that might be tough since it might be controlled through another IC. I would say try and trace out the pins for the mask ROM and see what you find.

Pretty sure there's also an existing mod for the Super Gameboy (1) that fixes the clock speed. That might also be neat to do along with a ROM swap, both of which would make it a true Super Gameboy 2.
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Re: Super Gameboy SNES Eprom Mod

by hidden0 Sat Jan 21, 2023 9:42 pm

Ziggy587 wrote:Hmm, well what I think is the mask ROM (the chip all the way on the right side of both boards) is a 32-pin IC. So my guess is that it may be the same pinout Nintendo used for their other mask ROMs. And it looks like it may be the same footprint used in other carts such as GSU, so existing adapter might be possible barring any fitment issues (which I think there might be). I would say trace the board out to confirm the pinout of the mask ROM, but that might be tough since it might be controlled through another IC. I would say try and trace out the pins for the mask ROM and see what you find.

Pretty sure there's also an existing mod for the Super Gameboy (1) that fixes the clock speed. That might also be neat to do along with a ROM swap, both of which would make it a true Super Gameboy 2.


That's what i was aiming for , But roughly i can find the and match the GND and VCC if that matches with the pinout of normal Snes standard maskrom from FX style carts that will be great start.

So i checked the GSU to TSSOP adapter is not fitting because of the interference nor the GSU to EEprom one . :/
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Ziggy587
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Re: Super Gameboy SNES Eprom Mod

by Ziggy587 Sat Jan 21, 2023 10:49 pm

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Re: Super Gameboy SNES Eprom Mod

by hidden0 Sat Jan 21, 2023 11:48 pm

Ziggy587 wrote:How about this one?

https://oshpark.com/shared_projects/05nrOQQh


This will be so bizare but i made one

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Noted the missing Pads for 1mb and traced the paths and pins will wire it up after For 1MB and GSU.

Image

just need to jump wire these and it might work
I know its bizzare
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Ziggy587
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Re: Super Gameboy SNES Eprom Mod

by Ziggy587 Sun Jan 22, 2023 9:07 am

It's not bizarre. If it works, it works! I've actually done something similar years ago with some old TSOP adapters that were big and clunky.

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If your cut down adapter doesn't work, the one I linked looks like it might fit.
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My Sale Thread - I am selling around three quarters of my video game collection as well as some other odds and ends!
hidden0
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Re: Super Gameboy SNES Eprom Mod

by hidden0 Sun Jan 22, 2023 12:00 pm

Ziggy587 wrote:It's not bizarre. If it works, it works! I've actually done something similar years ago with some old TSOP adapters that were big and clunky.

Image

Image

Image


If your cut down adapter doesn't work, the one I linked looks like it might fit.


Should work i guess cuz the connections missing i traced and there is nothign much left there just these 3 Jumpers ill give it a try now ,
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Re: Super Gameboy SNES Eprom Mod

by hidden0 Mon Jan 23, 2023 3:13 pm

It is showing me black screen the pcb i chopped off i tried to rebuild by jumpers the rom i used was supergameboy player 2 bios with patched vapor edition . Double checked the soldering job all look good i am getting a black screen
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