Even if you had the frickin' source code for the cpu and had it hooked up to a debugger it wouldn't be a trivial exercise. So, those modes are likely disabled at hardware level, and likely cannot be enabled with a software level hack. Haven't really been doing much on the forums so I didn't see this until now, sorry about the extremely late reply. I scraped away a bit of the coating on pin 90 and found it was tied to the negative terminal or ground on the calculator. I guess we're kinda taking the guy's word for it that this is an optimal hack, and that within this button-mashingmadness is not actually a much simpler secret backdoor key combothat was left by the programmer.

I'll post some images in the following days from the newer model, but a Spanish colleague already reversed the hardware for the old model: http://nitehack.The fx-82l variation came fitted into a hard plastic case which completely enclosed it protecting it well. I figure that the actual calculator software is hardcoded on the ROM to save costs, but it would be interesting if the software was actually contained on a built in EEPROM. To enter the service mode, we usually press 9 and go through all the display checks, ROM version, contrast and keyboard test. Mostly this doesn't mean anything, but if you enable ENG symbol display mode it will stick around even after power off if you want to keep that engineering symbol notation.

and then hitting DEL DEL instead of AC/on at the end to show all the 13131's to the right of the cursor and deleting them until the '0' is under the cursor and the rapidly alternating sin tan sin tan until a full reboot happens). We already have a disassembler written and are currently finding ways actually make the CPU execute the keystrokes asopcodes. Unfortunately I'm not really an electronics person and only have a rudimentary knowledge of electronic stuff. The key layout does seems to be the same as the fx-570MS and all the additional functionality seems to work except for Matrices and Vectors (Equation solver, integration, differentiation, constants, conversions).

The better (unlocked) calculators are the fx-570 - 991, and in the MS series, this calculators are discontinued, the 82MS is still in production but with a cheaper PCB. Just throwing that idea out there, because like you my mind boggles at the amount of work to create this if it really is a stack-smashing exploit (which I agree it appears to be).

one '5353 hack' worked, second time the calc just turned off, third time LCD segment issues, after one '1313 matrix hack' the '5353 hack' seems to work every time. Well, I am currently running a project dedicated to find more bugs and loopholes in the firmwares of these calculators, and we already know the CPU and have decompiled the firmware. Last but not least, it comes with an emulator software which when used with a pc and a projector enables me to demonstrate an operation to the entire class at once. The replacement device or gift vouchers will be provided at the discretion of Onsitego on the basis of the depreciated value of your device.I've owned one for years, since I started college, and at the time I bought the one that fit my needs, the Casio fx-82ES. calculation with percent +/- change sign (direct entry of negative numbers) RV exchange registers (X-Y) F floating-point notation Fix fixed-point notation: the listed decimals can be chosen (0-9) Sci scientific (exponential) notation Eng engineering notation a b/ c allows entry and display of fractions Sqr square root x 2 square pi value of pi (3. If you do attempt this hack again before performing the 'matrix' hack, you can get some weird LCD segment issues, or the calculator may just switch off.

To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. There are more pins (keyboard combinations) that were actual buttons in the calculator, so he analyzed that and found that some combinations can be triggered to directly activate extra modes from the superior model. Please be assured that any amount you feel able to donate will make an immediate and significant impact. To access this menu i pressed Shift + [on] + 7 , this brings up the infamous diagnostic mode or the service mode. I started however slowly drilling into the black gunk between the CPU (very slowly with a screwdriver) and where I believe the wires might be bonded to to see if there were any there.Extremamente recomendada para estudantes, pois possui todos os recursos da matemática básica, mas claro, não possui funções muito complexas, incentivando que o aluno se esforce para aprender a fazer o cálculo no papel e a caneta. I was just accepting the possibility that if it isn't resetting properly for you even with the power disconnected, it is possible that even though it seems to be resetting properly for me, it may not be (eg there is the possibility that some non-volatile flash memory is being affected by the software hack). These three quality features ensure that CASIO ClassWiz series calculators are educational tools that effectively support learning. Add this to its unabbreviated icon menu, additional set of functions and a high-resolution LCD screen and I would not ask for a more interactive, user-friendly, versatile classroom friend. Visual, interactive and textbook-based displays make operation easier for teaching the use of scientific calculators, so you can concentrate on teaching mathematics.