TI-83 Interesting Information

All items with no name were created by me.

When the batteries are low, every time the calculator is turned on, a warning message is displayed. Annoyingly, this clears the home screen and any expression that was being typed when the calculator was turned off. Also, if a program was running, and the calc shut off from Automatic Power Down, the program will be stopped by the warning message.
The space character is used very commonly in strings, but is actually invalid in program code. Ever notice that you never use the space in commands, anytime? Typing a space at the home screen produces a SYNTAX error. The only other character like this is the question mark.
On the Home Screen, type the following commands:
[[2,2][2,2]]\->\[A]
[A]/2
(select Quit)
{1,1}\->\dim([A])
(press Y=)
The calculator will crash, showing garbage. The memory will be cleared. To recover, remove one of the AAA batteries and press ON several times. Insert the battery, press ON, and then press 2ND-UP to increase the contrast if the screen is blank. Submitted by Andy Johnson
Create 2 programs, named CRASH and CRASH2. In CRASH, write:
[[2,2][2,2]]\->\[A]
[A]/2
In CRASH2, write:
{1,1}\->\[A]
Run CRASH, select QUIT, and run CRASH2. The Home Screen will then be shown, but if you edit either of the programs, they will appear empty. If you delete the programs, the calculator crashed. Submitted by A. R. Sedeno