Author Topic: CFX-9850G series hacking without hardware mod possible?  (Read 11889 times)

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Offline DJ Omnimaga

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Re: CFX-9850G series hacking without hardware mod possible?
« Reply #15 on: April 16, 2011, 03:30:09 am »
I think there used to be CasEmul, but it didn't seem to be a real emulator. It worked similarly to the TI-Nspire student software or something.

I'm still wondering if there wouldn't be any way to send a hacked file to the calculator, even if it required a third-party linking software to be made, like Ndless? It almost seems impossible that there's absolutely no way to launch ASM on these old calcs. After all, we did it with the TI-81 20 years after it came out, even if the calc got no link cable. :P
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Offline MPoupe

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Re: CFX-9850G series hacking without hardware mod possible?
« Reply #16 on: April 19, 2011, 05:20:40 am »
Does some kind of emulato exist for those models?
What's the CPU?
Real emulator seems to be in development - see http://mamedev.org/source/src/emu/cpu/hcd62121/hcd62121.c.html
The CPU seems to be hcd62121
If you need only simulator (not CPU emulator, but program, which interprets Casio casic language), I have written that in 1998, it is available on my page (http://martin.poupe.org/casio/download.html)
Screenshot:
<img src="http://martin.poupe.org/casio/images/example.gif">


Offline DJ Omnimaga

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Re: CFX-9850G series hacking without hardware mod possible?
« Reply #17 on: April 24, 2011, 03:19:18 pm »
Oh thanks for that, I'll have to check it out.


EDIT: Aw, it doesn't run on 64-bit Windows 7 :(
« Last Edit: April 24, 2011, 03:20:26 pm by DJ_O »
In case you are wondering where I went, I left Omni back in 2015 to form CodeWalrus due to various reasons explained back then, but I stopped calc dev in 2016 and am now mostly active on the CW Discord server at https://discord.gg/cuZcfcF


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Offline MPoupe

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Re: CFX-9850G series hacking without hardware mod possible?
« Reply #18 on: April 26, 2011, 04:32:49 am »
EDIT: Aw, it doesn't run on 64-bit Windows 7 :(
It is old (good) MS-DOS application - it may work in dosbox.
Source code is at http://martin.poupe.org/casio/hackdload.html
(any volunteer to port it to windows ? :-)

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Re: CFX-9850G series hacking without hardware mod possible?
« Reply #19 on: May 12, 2011, 05:48:34 pm »
Ah ok. I'll have to try Dosbox then. Someone should maybe port it to Windows 7 or maybe even make an emulator for the Prizm :P
« Last Edit: May 12, 2011, 05:48:45 pm by DJ_O »
In case you are wondering where I went, I left Omni back in 2015 to form CodeWalrus due to various reasons explained back then, but I stopped calc dev in 2016 and am now mostly active on the CW Discord server at https://discord.gg/cuZcfcF


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Offline TeamFX

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Re: CFX-9850G series hacking without hardware mod possible?
« Reply #20 on: January 03, 2017, 03:41:00 pm »
The fx-9750GA Plus has a modern and straightforward PCB design. It was manufactured in 2008 and has the classic CFX software running on it (without colors).

Is there a way to dump the ROM without desoldering the NOR flash chip (which cannot be programmed/erased by the CPU)?

E.g., by using some bugs, RAM backup hacking, or assembly code injection which would either print the ROM content on the LCD or send it via 3-pin cable to some other device (e.g. fx-9860G) or the PC.

See my post on casiocalc.org: http://community.casiocalc.org/topic/7630-fx-9750ga-plus-rom-dumping/
« Last Edit: January 04, 2017, 02:42:51 pm by TeamFX »