Author Topic: CFX-9850G series hacking without hardware mod possible? (Read 21144 times)

DJ Omnimaga · « **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.

MPoupe · « **Reply #16 on:** April 19, 2011, 05:20:40 am »

Quote from: critor on March 30, 2011, 12:45:42 pm

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">

DJ Omnimaga · « **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

MPoupe · « **Reply #18 on:** April 26, 2011, 04:32:49 am »

Quote from: DJ_O on April 24, 2011, 03:19:18 pm

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 ? :-)

DJ Omnimaga · « **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

TeamFX · « **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/

Author Topic: CFX-9850G series hacking without hardware mod possible? (Read 21144 times)

DJ Omnimaga

Re: CFX-9850G series hacking without hardware mod possible?

MPoupe

Re: CFX-9850G series hacking without hardware mod possible?

DJ Omnimaga

Re: CFX-9850G series hacking without hardware mod possible?

MPoupe

Re: CFX-9850G series hacking without hardware mod possible?

DJ Omnimaga

Re: CFX-9850G series hacking without hardware mod possible?

TeamFX

Re: CFX-9850G series hacking without hardware mod possible?