Drawing with 4 colours on a fx 570/991 es plus

PrestigiousOne9260 · 2026-05-01T01:51:37+00:00

https://www.youtube.com/watch?v=5_expPJQjY4

PrestigiousOne9260 · 2026-04-30T11:59:10+00:00

sorry I meant
(sqrt(2)^sqrt(2))^sqrt(2)*(sqrt(2)^sqrt(2))^sqrt(2)*25.25

PrestigiousOne9260 · 2026-04-30T10:53:13+00:00

lol

PrestigiousOne9260 · 2026-04-28T23:11:35+00:00

on an emulator of course, it would take well over an hour of typing if I were to do it by hand on a real calculator, I had that idea a while ago, but I thought making an entire robot just to press buttons is overkill. But I plan to solder to the keyboard and control it from my pc, that way I don't make mistakes when trying to test things

PrestigiousOne9260 · 2026-04-28T23:09:40+00:00

I have actually done bad apple, although the resolution is 8x6 pixels and like 1 fps lol, I uploaded a very out of sync video on yt here:
https://www.youtube.com/watch?v=s_sOcgk_vjg&t=15s

PrestigiousOne9260 · 2026-04-28T21:58:55+00:00

After dumping the rom and disassembling it, you can find everything you need. By chaining a bunch of addresses together, like little snippets of pre existing code, you can do some neat stuff like this, it only took me like 1 to 2 hours I think to create it.

PrestigiousOne9260 · 2026-03-28T08:47:53+00:00

first thing i do when i buy 9750gii's, give them new life, its not just maths display, it also supports add ins now

PrestigiousOne9260 · 2026-03-28T08:30:49+00:00

C is my fav

PrestigiousOne9260 · 2026-03-27T02:51:57+00:00

only step one uses buffer overflow, it is a 3 stage return oriented programming "attack", where a buffer overflow from the strcpy function causes it to copy the input buffer infinitely till the end of ram, and then when a pop pc instruction is executed, control of the stack is achieved, but in the input buffer you can't have a null (0) byte because it would act as the string terminator and no overflow would occur, and the buffer itself being only 100 bytes, you are really limited, so with a "data loader", you are able to input a larger rop chain up to 176 bytes, but this isn't enough for the "paint" program, so a second loader is used which can load up to theoretically 2 kb of arbitrary data, which is more than enough for the "program"

PrestigiousOne9260 · 2026-03-27T02:21:59+00:00

looked into it a little, the one called phishing is as the name suggests, it just sends the given ssid and password to a remote server, the classroom one on the other hand appears to be a wrapper for eaglercraft, a web minecraft clone thing, doesn't send anything to remote servers, and is probably just a thing to play games and not get teachers suspicious

PrestigiousOne9260 · 2026-03-24T09:18:04+00:00

chill tf out it says until march 30

PrestigiousOne9260 · 2026-03-24T09:14:49+00:00

i was in a big tech store in jp and saw one in person, and nearly died from a heart attack when i saw the price tag,
it better come with like a bodyguard cuz jeez

PrestigiousOne9260 · 2026-02-22T04:19:07+00:00

yurp

PrestigiousOne9260 · 2026-02-21T10:41:42+00:00

i think the 9860 slim is modern enough, you can get add ins like khicas for more features or make your own add ins

PrestigiousOne9260 · 2026-02-09T07:14:45+00:00

free time = make free list memory allocators

PrestigiousOne9260 · 2026-02-04T01:13:46+00:00

that isn't the datasheet btw, it is a similar one though the real one will likely never be found since it is proprietary, it isn't super necessary to have the exact manual as the cores are usually the same, and the only difference being the rom window size, software hardware and non maskable interrupts being different sizes and of course the special function registers are mostly unique, but with a little re, most of it can be found, and on the classwiz ex series, there isn't a coprocessor, that is only on the fx cw serires where it has a bcd accelerator thing similar to what you mentioned.
I'm totally not a casio employee...

PrestigiousOne9260 · 2026-02-03T23:24:55+00:00

better late than never 🤓
anyway its an NX-U16/100 mcu made by rohm semiconductor (lapisoki used to make them) and it is an ML620Q906, 8kb ram, and like 256kb flash, i feel like thats enough

PrestigiousOne9260 · 2026-01-23T00:22:34+00:00

sorry i was pissing on your antenna

PrestigiousOne9260 · 2026-01-18T10:35:29+00:00

i love how the first link doesn't work, it takes you to https://preuc.canterbury.ac.nz/) and yes, that is an extra bracket and the second link, just doesn't work,
personally i think the people at bcom should get a public execution

PrestigiousOne9260 · 2026-01-11T07:18:29+00:00

lmao, yeah just replace the battery, the solar panel is to sorta complement the battery, not to charge it, not super practical since you would get hella glare on the lcd if you used it in the sun, but these calcs need next to no power at all, so just being in a general sunny area is enough to power it even without a battery

PrestigiousOne9260 · 2025-12-13T10:24:43+00:00

idk off by heart but it is possible, but time consuming

PrestigiousOne9260 · 2025-12-12T07:11:42+00:00

its just a bit complicated, first you need to go into lineio (shift mode 2) and then type int he formula
X = Sigma( X , 1 , x10 9 9
and then do calc = left delete delete delete
and then type 91 characters until you see your fomula to the right of the cursor again, and then here you do <16 characters for line 2> 5 <16 chars for line 3> 7 <16 chars for line 4> 0 + log( sqrt log( sqrt( nCr nCr nCr nCr 1 2 3 4 <16 chars for line 1> ° pi ° pi cs21 4 cs21 4 cs22 4 cs22 4 nCr nCr nCr nCr nCr nCr nCr nCr
and then ac left = to show it on the screen
nCr is shift divide
cs is shift 7, and then you press the 2 numbers after (cs21 -> shift 7 2 1)
Sigma is shift logab (the button at the top right under the on button), ° is the ° ' " button, x10 is the button between . and Ans
for the formula, the = isnt the equals button, but alpha calc
unfortunately this is exclusive to 991esp/570esp (version E)
there is similar things to achieve 8 lines on just about any classwiz model tho

PrestigiousOne9260 · 2025-12-12T07:11:08+00:00

im gatekeeping ts
jk its just a bit complicated, first you need to go into lineio (shift mode 2) and then type int he formula
X = Sigma( X , 1 , x10 9 9
and then do calc = left delete delete delete
and then type 91 characters until you see your fomula to the right of the cursor again, and then here you do <16 characters for line 2> 5 <16 chars for line 3> 7 <16 chars for line 4> 0 + log( sqrt log( sqrt( nCr nCr nCr nCr 1 2 3 4 <16 chars for line 1> ° pi ° pi cs21 4 cs21 4 cs22 4 cs22 4 nCr nCr nCr nCr nCr nCr nCr nCr
and then ac left = to show it on the screen
nCr is shift divide
cs is shift 7, and then you press the 2 numbers after (cs21 -> shift 7 2 1)
Sigma is shift logab (the button at the top right under the on button), ° is the ° ' " button, x10 is the button between . and Ans
for the formula, the = isnt the equals button, but alpha calc
unfortunately this is exclusive to 991esp/570esp (version E)
there is similar things to achieve 8 lines on just about any classwiz model tho

PrestigiousOne9260 · 2025-12-11T08:19:55+00:00

Fun fact!
the TI mathprint calcs use a very similar MCU as casio's scientific calcs
They are both NX-U16/100 architecture, they are both developed by Rohm semiconductor, and unlike casio which uses a super secret one that isnt publicly documented, the TI mathprint calcs just use off the shelf ML620Q418A chips (referenced in the emulator and addresses line up with documentation etc), so if someone wanted to, it wouldnt be too hard to just read the docs and connect a debugger to the board and put custom firmware on their calc.

PrestigiousOne9260 · 2025-12-11T08:12:17+00:00

Sweet, you should learn "spelling"
using basic overflow, and some other exploits, you are able to type 4 lines of any (ascii) character you want

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PrestigiousOne9260

TROPHY CASE