Here is some bugs i've found in my fx 9750 g+ serial nr: A907 197 5Q10614A. I hope they don't work with your calculator :D
Bug 1
There is some really weird bugs related to Getkey. The instruction book sais clearly that Getkey is the number of the key that was latest pressed, but that's not true!
While 1
clrText
Locate 5,5,Getkey
WhileEnd
You'll see that Getkey not changes when you first press a key low on the keyboard for example "3" and then simultaneously press a key high on the keyboard like "9". But it works in the other direction! And if you press two keys on the same line Getkey will be zero!
Now try this program:
"PRESS SOME KEY QUICK!"
While Getkey
WhileEnd
You may notice that the program sometimes stops when you go from "3" to "9". That means Getkey is zero again!
Bug 2
But things are even more weird. Getkey isn't always zero! Try this:
"RELEASE ALL KEYS! 3...2...1...0"
Getkey=0
Getkey \=0 !! I've tested this and Getkey seems to be 9.99999999...
Try this:
"RELEASE ALL KEYS! 3...2...1...0"
Not Getkey
Getkey seems to ne zero again! And when you put Getkey into a variable or divide it with 2 or whatever it is zero.
Bug 3
Try this:
ClrGraph
StoPict 1
"Mem Error!"
Bug 4
Create a new, EMPTY program called for example EMPTY.
Then create another program containing
It causes Go error!
That one works!
Try this in Run mode and it always works.
There is a way to make an "interactive graph". Type Getkey and store it in Function 1. Go to Graph mode. Type "f1". Now the graph changes as you press different keys! Then trace. The trace cursor isn't on the graph!
Test mode
Warning! Take copies of all important data first!!
To enter test mode:
Shut off. Press ab/c + F6 + AC/ON at the same time.
I don't want to clear the memory, can I enter test mode?
Yes, but don't enter RAM or CYC mode.
How do I quit test mode?
The only way is ironically to choose "Rst/reset".
It causes Go error!
That one works!
