991CNX ROM dump

@⚡altish
Try following the steps I've done in the 68 mode post ( slash p slash 6297240690 ), stop after the "calc =" step when there's x=sum(x, 1, 1)+123...an on the screen. After pressing = what happens? (expected result: the cursor flashing on the screen, like shown in the video)
In that case, what's the maximum formula that can be evaluated before the calculator crashes? (expected 33)

OK. Wait for a while

I don't understand what you are exactly saying. I already type 110 characters before an. Then what does 33 mean?

@⚡altish Try typing (E0 22 32) (corresponds to character (bold G) pi 2) after the 34 characters. The checksum screen should be shown, if it doesn't, try replacing E0 with E7 (bold F character) or D8 (factorial))

G pi 2 freeze
f shut down
分数线 syntax error

Can you give me a symbol table here?

@⚡altish Can you try 2:279C (bytes: 9C 27 32) (expected: contrast test) and 2:279A (expected: freeze the calculator)?

27D24 solar model OK
27D22 freeze

@⚡altish
(34 characters) 7A 20 32 30
21 30 30 C9 30 30 30 30
52 20 32 30
21 30 30 A6 30 30 30 30
52 20 32 30
There are only three 20 that cannot be typed directly, but they can be obtained with the "character conversion method" (calculation history rewrite is not necessary)
(I'm not sure if I wrote the hexadecimal correctly. Can you post the converted characters "arcsin( i 2 ..." to crass-check the result?)
Expected behavior: something (content of 16 bytes of the ROM) on the screen +"Press AC", when AC is pressed then something else is displayed on the screen.

It raised Math error after I pressed AC and hanged

! pi 2 can enter checksum

) pi 2 raises syntax error and return normally after press ac
三次方 enter checksum and raise a syntax error and return normally after ac

> a+ b i is the same to )

@⚡altish Just to check that you entered the data correctly: does the screen before pressing [=] look like this?

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