Qoob Chip

ViperGC/Qoob/etc
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ledu205
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Re: Qoob Chip

Post by ledu205 » Thu Jan 30, 2020 8:41 am

webhdx wrote:
Thu Jan 30, 2020 7:21 am
Papy.G: Qoob SX has dedicated parallel flash memory chip. It's possible to replace it but I'm not sure if it will be usable. I bet flashing tool is checking the file size so it might be required to use external flash programmer. Same story goes for Viper GC, if I'm not mistaken two use the same flash chip (SST 39VF010). I was actually thinking about doing it but first I need to go through other DIY Projects.
Tested with viper 39VF020 to replace 39VF010 not working
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Re: Qoob Chip

Post by Papy.G » Thu Jan 30, 2020 9:30 am

Ah, good news, check if the chip can actually adress much more memory, then, you may be able to beef it up.
Still, as some advanced modders/coders on this platform suggested, as there can be protected code, closed source or so around some older chip devices, it may be effortless and of a better profit for all the community to go forward with newer ones.

I know it can be a bit frustrating to have an "obsolete" device, and believe me, I'm quite experienced in this, owning a DS Neo-MKIII and a GBA SuperCard SD and getting stuck with no updates to beta firmwares and never achieve the expected performance, despite the money they orignally cost me.
ledu205 wrote:
Thu Jan 30, 2020 8:41 am
Tested with viper 39VF020 to replace 39VF010 not working
Not very surprisingly, indeed.
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Re: Qoob Chip

Post by Undead Sega » Fri Jan 31, 2020 12:21 am

What part of this chip is the flash memory?

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Re: Qoob Chip

Post by webhdx » Fri Jan 31, 2020 7:17 am

The part labelled AM29LB160DB.
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Re: Qoob Chip

Post by Undead Sega » Fri Jan 31, 2020 3:52 pm

And is that chip where the Qoob bios is contained?
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Re: Qoob Chip

Post by Papy.G » Sun Feb 02, 2020 10:02 am

Undead Sega wrote:
Fri Jan 31, 2020 12:21 am
What part of this chip is the flash memory?
It is quite obvious, you have three big chips on this board, a µC in the MCS-51 family, an Asic, and a Flash memory.
Undead Sega wrote:
Fri Jan 31, 2020 3:52 pm
And is that chip where the Qoob bios is contained?
That depends on what you mean by Qoob bios. The way the "chip" behaves is dictated by the code contained in the 89C51 rom (it is internal flash, as suggested by the 9, 80C51 would be a OTP one, for example) combined with the ASIC configuration and board topology. If you want to know where the payload (the code injected in the gamecube to "fool" it, it is probably somewhere in this 29xx chip.
Still, I don't know what is the available space for the IPL boot thing on it, but among 16Mb (2MB), there should remain enough.

Swapping such a chip may be quite a hassle and overkill compared to writing a file to an SD. :roll:
It can be done, sure, but you can fry the whole thing as well, it's you to decide if it's worth it. :|
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Re: Qoob Chip

Post by Undead Sega » Wed Feb 05, 2020 11:22 pm

Papy.G wrote:
Sun Feb 02, 2020 10:02 am
Undead Sega wrote:
Fri Jan 31, 2020 12:21 am
What part of this chip is the flash memory?
It is quite obvious, you have three big chips on this board, a µC in the MCS-51 family, an Asic, and a Flash memory.
Undead Sega wrote:
Fri Jan 31, 2020 3:52 pm
And is that chip where the Qoob bios is contained?
That depends on what you mean by Qoob bios. The way the "chip" behaves is dictated by the code contained in the 89C51 rom (it is internal flash, as suggested by the 9, 80C51 would be a OTP one, for example) combined with the ASIC configuration and board topology. If you want to know where the payload (the code injected in the gamecube to "fool" it, it is probably somewhere in this 29xx chip.
Still, I don't know what is the available space for the IPL boot thing on it, but among 16Mb (2MB), there should remain enough.

Swapping such a chip may be quite a hassle and overkill compared to writing a file to an SD. :roll:
It can be done, sure, but you can fry the whole thing as well, it's you to decide if it's worth it. :|
Please do forgive me, I am not entirely familiar with chips :(

What I meant by Qoob bios is the actual Qoob file(s). And if you say these are in the AM29LB160DB, then what is the purpose of the ASIC and 89C51 chips (and what code is in this)?

While you suggest swapping the chip as a feasibility, can't the board be "cloned" or redesigned from scratch to accommodate SWISS?
Besides, why does it have to be a Qoob mod chip, can't SWISS be but on any chip perhaps?
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Re: Qoob Chip

Post by emu_kidid » Thu Feb 06, 2020 2:04 am

Undead Sega wrote:
Wed Feb 05, 2020 11:22 pm
While you suggest swapping the chip as a feasibility, can't the board be "cloned" or redesigned from scratch to accommodate SWISS?
Besides, why does it have to be a Qoob mod chip, can't SWISS be but on any chip perhaps?
You need to stop, this seems to be far beyond your understanding.

Swiss can be put on anything similar to Qoob if given enough space. HyperBoot is an example of such a device that's available these days, check more info here.
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Re: Qoob Chip

Post by Undead Sega » Fri Feb 07, 2020 2:26 am

emu_kidid wrote:
Thu Feb 06, 2020 2:04 am
Undead Sega wrote:
Wed Feb 05, 2020 11:22 pm
While you suggest swapping the chip as a feasibility, can't the board be "cloned" or redesigned from scratch to accommodate SWISS?
Besides, why does it have to be a Qoob mod chip, can't SWISS be but on any chip perhaps?
You need to stop, this seems to be far beyond your understanding.

Swiss can be put on anything similar to Qoob if given enough space. HyperBoot is an example of such a device that's available these days, check more info here.
Okay yes, maybe I do, but I was just simply trying to understand everything as well :(

Also if that's the case, this kinda goes back to my prevous post a month ago, as you say if this can be anything similar to Qoob if given enough space, then a homemade XenoGC a possibility perhaps?
https://www.gc-forever.com/wiki/index.p ... noGC_Clone
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Re: Qoob Chip

Post by Papy.G » Fri Feb 07, 2020 9:25 am

The 8051 is a very versatile µC, quite impressive for its time (second generation of intel's "single-chip Microcomputer", back at the beginning of the 80's), and to begin, it can run programs off its internal memory, off an external one, or from both, if you don't know how it is done on the design you want to modify or clone, you're lost. And it's just one of the three chips that can support many configuration schemes.
I don't know about asics, but this one probably deals with the way the Flash chip is accessed by the 8051, since it can't directly adress more than 64kB of data and 64kB of code on its external memory bus (except if expanded 16bit commands are used), it may also host a letterbox system and some other buffers and bus logic.
The Xeno GC is based on an AVR µC, I don't know that familly, but it seems it can't adress external memory other than SPI based, because of the 28pin package, and that limits its speed if not the memory size.

With such a low background on the subject, wanting to do what you suggest is way high, you have better use your Qoob as it is or wait for Hyperboot PNP, you'll loose less time and money re-thinking things that other people more advanced have already done.

I have begun such a project, beginning from nothing and wanting to turn a phoneline terminal into a computer (8051 based :P ) after a short study that lead me to the conclusion not only it was feasible, but it was indeed anticipated from the MB design step! 8-)
I had to dig out the 8051 and VDP documentations, reverse-engineer the motherboard of various models, but now I'm stuck at the Rom study, because the learning curve is so hard, and it is very time consuming!
Undead Sega wrote:
Wed Feb 05, 2020 11:22 pm
Papy.G wrote:
Sun Feb 02, 2020 10:02 am
That depends on what you mean by Qoob bios. The way the "chip" behaves is dictated by the code contained in the 89C51 rom (it is internal flash, as suggested by the 9, 80C51 would be a OTP one, for example) combined with the ASIC configuration and board topology. If you want to know where the payload (the code injected in the gamecube to "fool" it, it is probably somewhere in this 29xx chip.
What I meant by Qoob bios is the actual Qoob file(s). And if you say these are in the AM29LB160DB, then what is the purpose of the ASIC and 89C51 chips (and what code is in this)?
Application Specific Integrated Circuit is quite self-explanatory, the rest of the answer was already in my previous answer. ;)
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Re: Qoob Chip

Post by codetvirus » Sun Feb 23, 2020 8:14 pm

Papy.G wrote:
Fri Dec 20, 2019 10:30 am
The disc image there is one that boots itself and updates the bios, not a boot forwarder.

If you can run backup discs and don't want to setup a GameExploit, there's a Disc image in the GBI extras that forwards to SD Gecko/SD2SP2.
Hi, ill boot this image and enter the corresponding .elf bott when boot it says need to be in flash mode. How can i enable this? Thanks.
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Re: Qoob Chip

Post by Papy.G » Mon Feb 24, 2020 12:39 pm

You have to refer to your chip documentation to know how to set it to flash mode, maybe there is a menu or a jumper on the board?
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Re: Qoob Chip

Post by Undead Sega » Sat Mar 28, 2020 2:48 pm

Papy.G wrote:
Fri Feb 07, 2020 9:25 am
The 8051 is a very versatile µC, quite impressive for its time (second generation of intel's "single-chip Microcomputer", back at the beginning of the 80's), and to begin, it can run programs off its internal memory, off an external one, or from both, if you don't know how it is done on the design you want to modify or clone, you're lost. And it's just one of the three chips that can support many configuration schemes.
I don't know about asics, but this one probably deals with the way the Flash chip is accessed by the 8051, since it can't directly adress more than 64kB of data and 64kB of code on its external memory bus (except if expanded 16bit commands are used), it may also host a letterbox system and some other buffers and bus logic.
The Xeno GC is based on an AVR µC, I don't know that familly, but it seems it can't adress external memory other than SPI based, because of the 28pin package, and that limits its speed if not the memory size.

With such a low background on the subject, wanting to do what you suggest is way high, you have better use your Qoob as it is or wait for Hyperboot PNP, you'll loose less time and money re-thinking things that other people more advanced have already done.

I have begun such a project, beginning from nothing and wanting to turn a phoneline terminal into a computer (8051 based :P ) after a short study that lead me to the conclusion not only it was feasible, but it was indeed anticipated from the MB design step! 8-)
I had to dig out the 8051 and VDP documentations, reverse-engineer the motherboard of various models, but now I'm stuck at the Rom study, because the learning curve is so hard, and it is very time consuming!
Undead Sega wrote:
Wed Feb 05, 2020 11:22 pm
Papy.G wrote:
Sun Feb 02, 2020 10:02 am
That depends on what you mean by Qoob bios. The way the "chip" behaves is dictated by the code contained in the 89C51 rom (it is internal flash, as suggested by the 9, 80C51 would be a OTP one, for example) combined with the ASIC configuration and board topology. If you want to know where the payload (the code injected in the gamecube to "fool" it, it is probably somewhere in this 29xx chip.
What I meant by Qoob bios is the actual Qoob file(s). And if you say these are in the AM29LB160DB, then what is the purpose of the ASIC and 89C51 chips (and what code is in this)?
Application Specific Integrated Circuit is quite self-explanatory, the rest of the answer was already in my previous answer. ;)
Greatest apologies for my very late reply, things were happening at home and of course now what's going on in the world :(

I really very much appreciate that detailed post, it was very informative indeed (some of which is beyond my depth of understanding, hahaha).

Thus, are you trying to say that something like the XenoGC chip is that specific or fussy that it won't recognise or accept another flash memory chip with larger space? i.e. to put SwissGC in its place? :(
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Re: Qoob Chip

Post by Papy.G » Mon Apr 06, 2020 12:44 pm

I said that it may be slow, if even it is feasible, to add external Flash to a Xeno GC, and if we manage to add SPI memory, it would be worth to go the extra mile to get SD support as well.
For this kind of application, you have better start with high-speed 8051 core µC who will be able to handle the SPI or Parallel memory with decent data rates. That may be why the Qoob has such a core-based µC on board.
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