June 18th, 2019, 17:43
June 18th, 2019, 17:55
June 18th, 2019, 17:59
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June 18th, 2019, 18:45
ICM 128+32 FBGA88 M36L0T7050T · ICM 128M+64M FBGA88 M36L0T706
June 18th, 2019, 19:26
June 18th, 2019, 19:31
June 19th, 2019, 2:23
June 19th, 2019, 8:56
June 19th, 2019, 9:48
June 20th, 2019, 5:53
HaQue wrote:Ive tried a few times to read a CFI but not had success yet, there is not a lot of info about it.
June 20th, 2019, 5:59
June 20th, 2019, 9:07
June 20th, 2019, 10:47
June 20th, 2019, 14:43
June 20th, 2019, 18:17
June 20th, 2019, 22:28
mgysgthath wrote:I appreciate you looking, and your advice. But I'm still not really sure where to begin. Can you see any interfaces on that board? Without schematics which we'll never get, or something clearly labeled, I'm lost.
When I first opened it, I was hoping with all the easy to reach connectors on that memory module, it would be simple to solder a few wires and somehow pull the data off, but it doesn't seem like that is going to be the case.
Do you have any suggestions, or should I let it go, do you think?
June 20th, 2019, 23:11
June 21st, 2019, 2:33
My first attempt to dump it with a raspberry pi + TSOP56 adapter did not work out because obviously the GPIO of the raspberry pi only has 26 pins, but you need more to handle the address bus and Data i/o of a tsop56 chip. (Well, 56 pins.)
So i got a Flashcat USB and the fitting tsop56 adapter from imbedded computers, put the chip in there and dumped it. Really easy.
June 21st, 2019, 9:00
HaQue wrote:mgysgthath wrote:I appreciate you looking, and your advice. But I'm still not really sure where to begin. Can you see any interfaces on that board? Without schematics which we'll never get, or something clearly labeled, I'm lost.
When I first opened it, I was hoping with all the easy to reach connectors on that memory module, it would be simple to solder a few wires and somehow pull the data off, but it doesn't seem like that is going to be the case.
Do you have any suggestions, or should I let it go, do you think?
Being not sure where to begin in cases like this where there is no clear serial port, JTAG or easily identified controller is normal, so currently you are on the right track!
As Franc said, not having access to CPU pinout or any markings does present a stumbling block. But what you do have is a nice open board with the ability to easily probe it and solder around if need be.
The 4 pads in between CPU and crystal Osc could be something, or could be nothing! interesting the crystal is same frequency as original NES, not a common part to find these days!
The memory board interests me, as it HAS to be a kind of drop-in part from somewhere that gets used on other devices or different variations of devices like this, otherwise they would just create a mainboard to hold the memory chips directly. Also, I am not sure of the age of this product, but the memory chip technology looks rather old. memory such as this was popular for things that used files/data straight off the chip, rather than something like NAND where it would be read from the chip but then converted straight to files or sent to RAM or needed to work through something like a flash controller (USB flash drives for example). common uses were early cell phone memory, bootloaders for embedded systems etc.
I seriously doubt any type of protection to hacking.
I have a few different FlashCats that are supposed to read CFI chips. Hopefully the unit I bought is similar to yours, ad was slighly different but essentially details look the same.
What I normally do in situations where you need to strip things apart is just buy another unit to take chips off and map, then you still have a complete unit to run test on when you conjure up theories.
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