( 07:49 PM)lrdheat Wrote: Hi Jebem and Gerald, I just checked my version.it says CY 235 Ver B Gerald.my unit doesn't seem to have the continued fraction(where is this function on your device?) I think I was mistaken about matrices being retained in memory after changing mode or turning unit off. Variables are retained. Not continued fraction but recurring decimal. Eg For input 7/107 the calculator displays 0,299 all of the figures after the, (decimal point in German) connected by a vinculum.
The following list was written by user202729 and serves as the guide to this forum thread. Also available in the Javascript code above. No longer needed now as we already have the ROM. Hardware description:,.
(no English translation this time). High-level functions:. There are some outdated information about 'real address' and 'emulator address'.
The 991EX definitely accepts longer equations in textbook entry mode than the 991ES. EX also faster on integration. EX sacrificed GCD, LCM, product of equation from x=? I have downloaded the FX-991EX emulator, but the subscription model used on Classwiz emulators (and Classpad II, too!) is a great tentative for Casio make more money. The Casio FX-ES computer software replicates the FX-300ES scientific calculator, allowing teachers to show the whole class step-by-step instructions on how to perform calculations and get the most out of their calculator. Casio FX-ES Emulator Software. MSRP: $ 29.99 $ 27.99 $ 19.99. For FX-55 Plus, FX-300ES Plus, FX-115ES Plus & FX-991ES.
Now we had the real ROM of the calculator that is not necessary. Edited by SopaXorzTaker, 28 February 2018 - 02:22 PM. Add user202729's markdown version. Now the little A and B from the Reg menu have a weird behavoir.
![Emulator Emulator](http://i.ytimg.com/vi/gQ3zZhDJtrk/0.jpg)
They have the same effect as r where it freezes they correspond to 89 and 8A respectively 89 is jump A24, as per Hitachi. 8A is call A16. This means jumping to address contained in the next two (16) or three (24) bytes. It.may. explain some of the glitches encountered, though I don't know what r and Ans do, as they correspond to undefined instructions.
Hm, maybe crafting hackstrings is possible using this method. Let's try: (x(((x(((x(((x(((AnsAns Where x is that X character with a hat.
Corresponds to jmp 0x282828 (Hitachi), which might do something. By the way, this shows some weird firmware running on a calculator.
Edited by SopaXorzTaker, 22 August 2016 - 05:42 AM. Now the little A and B from the Reg menu have a weird behavoir. Interesting to know that fx-82 ES plus and fx-991ES plus are SuperH architecture I am a fx-82 ES Plus owner, if you want me to test something in the calc, please, tell me.
(Now, I'm in holidays) Can you please take your calculator apart (if you do it carefully, it won't break) by unscrewing the screws on the back and opening the case? If you can, please photograph the circuit board inside. This may help in our research. You can also test the hackstrings which we were discussing above. Edited by SopaXorzTaker, 22 August 2016 - 06:27 AM.
Interestingly, if I try A on the end of that, it shows Maths error as expected. But then if I delete the A and put the X hat character (the one from the Reg menu) and press equals on the same sequence, it actually works but nothing else happens (and nothing seems to glitch). If I press equals again it this time freezes. However with r it always freezes regardless. Maybe we are getting somewhere with the X hat from reg menu Try replacing the Sqrt with another function such as log, ln, etc.
The behavior should change. This would prove that the hackstrings are actually executed as data by the CPU. I found something!
You know the reciprocal button? The one that says x to the power of -1? Do this I will say that button as reci I will little A from the reg menu as just A 5reci(5reci(5reci(5reci(AnsAnsA press equals you should get math error then press Right on the error screen and delete the A then go to the reg menu and select the X with a hat so that is on the end instead and press equals. It will freeze but then after a few seconds, the top row will also turn off, then the calculator itself has shutdown, so this is indeed different behavoir Also when you turn it back on, all the settings have been reset You have to do A first otherwise it freezes without turning off Looking up that character. I think it is another valid instruction. That character is 77 hex. Hitachi instruction: sub mem(reg indirect), reg.
Probably corrupts some memory location. I think that triggers data corruption, so the calculator hard-resets itself. Edited by SopaXorzTaker, 22 August 2016 - 10:35 AM. This this time, I pressed two for the data menu and filled some data some.
Then I did the 贸x option from the Var menu and then put A from the reg menu. After math error I put x hat next to the 贸x and get syntax error. And now A is not giving me math error anymore when I put stuff before it but everything just gives answer zero with A now The fact that you get characters with digraphs proves that there is another character codepage for text which partially goes unused. Edited by SopaXorzTaker, 22 August 2016 - 11:24 AM.