If anyone is interested in some pictures, I could look at giving my old Nikon a bit of exercise and get some pictures of the boards.In Spain (where I live) they are very common because they are really cheap.
![]() Nevertheless the calculator scenario is much more complex, at least for the casio fx-82ms which isnt programable. Ill post some images in the following days from the newer model, but a Spanish colleague already reversed the hardware for the old model. 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. I have a hardware setup for that Ill show off as soon as possible. Hack Casio Fx-991Ex Software Layer IsThe software layer is still pretty much unexplored, so thats why Im here. How could I apply some of that knowledge to reverse the fx-82MS Ive read something about official casio emulators. Ive splitted your post from the other thread, because it is other model. Because only 0 works (and nothing else) I suspect thats an Easter egg Casio left in the calculator. I also have some calculators in the old MS series (where I can test the bugs). Unfortunately, I have no idea how the glitch works because: There are no correct emulator of any calculator, that I can extract the ROM and expect it to be reasonably similar to the ROM of the real calculator. I dont know the details of the hardware (CPU model, etc.) although I guess its the same kind as the ES and ES PLUS series. ![]() Probably not a good start for post number 2.my apologies if this is a problem. The above hack works fairly reliably on my fx-82MS ( 5 3 5 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. Hack Casio Fx-991Ex Full Memory ClearI found that a full memory clear is insufficient to reboot the calculator fully (I just discovered that removing the battery and shorting the cap which should reset the calculator proper bought up a matherror message, but the hack still worked. After another battery reset I had mixed success with the hack, but once the matrix hack is used it seems to work every time, so there might be something sticking around in memory even after the matrix hack). While applying this hack works on my fx-95MS, it wont allow you to perform Matrix or Vector operations. 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). I also noticed that the the fx-82MS is slightly faster than the fx-95MS. Also worth noting is that display flags set while the hack is active are kept even after the hack is reset (power off or ON button). Mostly this doesnt 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. The PCBs have some different markings, but look to be at a quick glance very similar.
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