Author Topic: Upgrading the TI-82Stats.fr / TI-76.fr  (Read 17617 times)

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Offline NeoCrisis

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Re: Upgrading the TI-82Stats.fr / TI-76.fr
« Reply #15 on: November 24, 2010, 10:43:48 am »
so somebody would need to take off his calc's PCB??!!



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Offline critor

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Re: Upgrading the TI-82Stats.fr / TI-76.fr
« Reply #16 on: November 24, 2010, 12:11:44 pm »
so somebody would need to take off his calc's PCB??!!


There seems to be some grounding difference between the TI-82Stats.fr/76.fr ASIC and the TI-73/83+ ASIC.

And after unsoldering some pins, it seems the difference is inside the ASIC.

I'm going to test with another calculator. I'll post the shematics, if those informations are confirmed.


But if I'm right, then there are 2 possibilities:

* either the ASIC chips are different from the start (which I doubt), although their references are identic...

* either the ASIC is electrically configured during production, in order to operate in basic 83 mode, or in 73/83+ mode
(through some kind of flashing, or by opening/closing some internal jumper by applying a high voltage...)


In both cases, it seems to be bad news for us... unless we can access the top-secret TI-738X ASIC datasheet.
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Offline NeoCrisis

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Re: Upgrading the TI-82Stats.fr / TI-76.fr
« Reply #17 on: November 24, 2010, 12:24:46 pm »
good luck!! ;)



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Offline FloppusMaximus

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Re: Upgrading the TI-82Stats.fr / TI-76.fr
« Reply #18 on: November 24, 2010, 11:45:22 pm »
Keep in mind that if you do have to modify the hardware to put it into "83+ mode", the regular TI-83 OS may not be able to boot properly in that mode.

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Re: Upgrading the TI-82Stats.fr / TI-76.fr
« Reply #19 on: November 25, 2010, 08:55:14 am »
Keep in mind that if you do have to modify the hardware to put it into "83+ mode", the regular TI-83 OS may not be able to boot properly in that mode.

Yes, I know.
I've allready tested on TilEm by pasting a TI-83 ROM in a TI-73/83+ ROM, and on a true TI-83+ by flashing a TI-83 OS. The TI-83 OSes (including the special 1.11fr7 and 1.00fr5 versions) aren't booting on a TI-83+ hardware.

So even if I modify the hardware, I won't be able to know if it's in 73/83+ mode before flashing a new OS and boot code...


I suppose the best test to be sure that the difference is inside the ASIC would be to replace the TI-82Stats.fr/76.fr ASIC by a TI-73/83+ ASIC.

If it does boot the TI-82Stats.fr/76.fr OS, then the mode is set by the PCB and we "might" be able to do something about that.
If it doesn't boot (and if it is properly soldered...), then the mode is set inside the ASIC, and we need the private datasheets from TI...


By the way, TI-73 OSes need to be patched before installing them on TI-83+ hardware, and TI-83+ OSes need to be patched too before installing them on TI-73 hardware.

Why? Are those patches needed only because of the different boot codes, or is there something different with the ports?

If there is something different with the ports, it may come from the same thing that is making thoses ASICs operate in 83 mode here...
« Last Edit: November 25, 2010, 09:01:44 am by critor »
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Re: Upgrading the TI-82Stats.fr / TI-76.fr
« Reply #20 on: November 25, 2010, 04:43:21 pm »
TI-83+ OSes need to be patched too before installing them on TI-73 hardware.

Why? Are those patches needed only because of the different boot codes, or is there something different with the ports?
You mean Chameleon, right? http://www.ticalc.org/archives/files/fileinfo/416/41660.html

Also, from what I remember, when you install a patched 83+ OS on the TI-73, you don't have the 8192 bytes limit of executable ASM code that is present on a real 83+ (8811 in Ion and MirageOs). That allows more possibilities when writing games, but then your game won't run on a real 83+...

Offline FloppusMaximus

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Re: Upgrading the TI-82Stats.fr / TI-76.fr
« Reply #21 on: November 25, 2010, 11:38:39 pm »
By the way, TI-73 OSes need to be patched before installing them on TI-83+ hardware, and TI-83+ OSes need to be patched too before installing them on TI-73 hardware.

Why? Are those patches needed only because of the different boot codes, or is there something different with the ports?

If there is something different with the ports, it may come from the same thing that is making thoses ASICs operate in 83 mode here...
Mainly it's the boot code differences.  But there are some very minor hardware differences in ports 2 and 16.

Offline Blagus

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Re: Upgrading the TI-82Stats.fr / TI-76.fr
« Reply #22 on: July 24, 2011, 09:25:38 am »
Hi. Sorry for reviving thread but has anyone been able to do anything?
I got TI-82 Stats.fr, and all I want is English on that calc. Can I flash something, or load some language file?

Offline calcdude84se

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Re: Upgrading the TI-82Stats.fr / TI-76.fr
« Reply #23 on: July 24, 2011, 06:47:18 pm »
Hello, Blagus, and welcome to Omnimaga! :D If you haven't yet, you might want to consider introducing yourself. (It's not mandatory if you don't want to :P)
Related to the topic at hand, it seems that flashing something would require a hardware modification, if it's even possible. I don't know whether the TI-82 Stats.fr (or the TI-83) has support for other languages, though I'm pretty sure it's a "no."
Be aware that the topic you posted in is 8 months old, and not very many people here have a TI-82 Stats.fr or TI-83, so you might have to wait a bit for someone knowledgeable. :)
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Offline TIfanx1999

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Re: Upgrading the TI-82Stats.fr / TI-76.fr
« Reply #24 on: July 24, 2011, 07:00:14 pm »
If I remember the old TI's don't have language apps. So I'm guessing that's a no. :( Welcome to Omnimaga by the way.

Link for comparison: http://www.datamath.org/Graphing/TI-82_SPEC.htm

Since it doesn't have Flash, the OS isn't upgradeable. This also means no language apps. :(
« Last Edit: July 25, 2011, 12:05:17 am by Art_of_camelot »

Offline calcdude84se

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Re: Upgrading the TI-82Stats.fr / TI-76.fr
« Reply #25 on: July 24, 2011, 08:45:36 pm »
1st big surprise, unlike TI-83 calculators they don't have a 256Kb EPROM, but a 512Kb FlashROM.
The FlashROM is either a Spansion S29AL004D70 either a MX29LV400, which are both pin compatible and used in recent TI-73 and TI-83+ calculators.
AoC, the TI-82 Stats.fr does have flash ROM ;)
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Offline TIfanx1999

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Re: Upgrading the TI-82Stats.fr / TI-76.fr
« Reply #26 on: July 24, 2011, 09:09:19 pm »
Hrm, I guess the comparison chart on data math was wrong then. It didn't show the Ti-82 stats.fr having flash rom. D:

*Edit*

In that case I'm not sure then. From what I could tell it doesn't support apps (does it?), but if the OS is upgradeable there could be an English version(Check TI's french site?). I don't think there is though. Perhaps one of our French users could answer, as I'm not overly familiar with this particular line.
« Last Edit: July 25, 2011, 12:09:40 am by Art_of_camelot »

Offline calcdude84se

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Re: Upgrading the TI-82Stats.fr / TI-76.fr
« Reply #27 on: July 25, 2011, 11:56:35 am »
AoC, as far as TI cares it's a French TI-83 with a 256KiB ROM. They wouldn't help. :P
Being able to flash it is, in fact, the focus of this thread. ;)
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Offline JosJuice

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Re: Upgrading the TI-82Stats.fr / TI-76.fr
« Reply #28 on: July 25, 2011, 01:27:14 pm »
AoC, as far as TI cares it's a French TI-83 with a 256KiB ROM. They wouldn't help. :P
TI only cares that it's a French TI-82 STATS. They won't say that it's an 83, and they won't say how much memory it has. :P

Offline critor

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Re: Upgrading the TI-82Stats.fr / TI-76.fr
« Reply #29 on: July 25, 2011, 01:56:17 pm »
The TI-82Stats is just a basic TI-83 with the latest 1.10001 ROM.

Both TI-82Stats.fr and TI-76.fr are running a basic TI-83 OS translated into french on a TI-83+ hardware.
So they have 512Kb Flash.

But only the first 256Kb are connected to the ASIC: you need to solder an additional pin.

And even after that, as the ASIC is operating in basic TI-83 mode, we found no way of accessing the additional 256Kb or reprogram the Flash through software.
« Last Edit: July 25, 2011, 01:57:00 pm by critor »
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