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PostPosted: Thu Sep 28, 2017 4:11 am 
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Hi.
Recently I had problems with a N64 GSPro.
I was able to get some information by using a multimeter to (more or less) find the connections.
I'm sharing the txt file I made here, in the hope it can help someone else.
It's really far from complete, and possibly have some errors/mistakes, but was enough to help me fix the issues I had.

Please, if someone have a more complete, or wish to "fill the blanks" in this "schematic", feel free to use this info.
The only thing I ask is that the information is shared with the community.
If someone have or can find a better/more complete work, please let me know.

Thanks in advance.


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N64 GSPro pinouts.txt [4.62 KiB]
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PostPosted: Sun Jan 21, 2018 6:20 am 
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Buying GS is a mistake itself. I have couple of them, both bricked. I wish there was easy method to reprogram the firmware.


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PostPosted: Sun Jan 21, 2018 10:37 am 
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sepi wrote:
Buying GS is a mistake itself.

I also think more or less the same way.
These things seems to be very badly designed, specially the PCB.
Maybe if someone could make a better PCB they could work better.

sepi wrote:
I wish there was easy method to reprogram the firmware.

I had an idea but couldn't try it, since I already have removed the flash ROMs and put sockets on them.
The idea was to make an adapter with an PLCC32 socket on an end and a DIP plug (or whatever your programmer uses) in the other end.
With this it may be possible to flash the ROMs onboard, without removing it.

Could this possibly work?
Wouldn't it damage the rest of the circuit?
Can someonte try it and share the results?

I'm also having trouble with an N64 DexDrive (it's not detected and getting hot), but I think I'll open another thread while trying to fix it.


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PostPosted: Sun Jan 21, 2018 11:23 am 
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You can't program memories in system that way. When you put your clips to the memory, you're powering the whole board, and the processor is driving memory's address lines as well as your programmer does and you have bus conflict.

Even if you cut off the procesor's VCC from memory's VCC, it might still be powered through clamp diodes on other lines.

The only way is to desolder it and program out of system or use something like kazzo to force the processor to drive memories with arbitrary address/values that will make up programming commands.


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PostPosted: Sun Jan 21, 2018 11:31 am 
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So, that was a really bad idea. :(
Thanks for clarifying! :beer:

The best way seems to be what I've done: remove the ROMs and put sockets.
I already needed to flash it many other times.
These things brick for almost nothing!!
I discovered that if I enable the code searcher and don't do any search it bricks. :x
I hope someone redesigns the board and/or do a better software.
Two things I unfortunatelly lack the ability to do. :mrgreen:


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