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Example of Inputting Hex Code
IMPORTANT: DO NOT UPGRADE TO TI-OS 5.6. For more information please click here. Asm Programming was completely removed in TI-OS 5.6, and once upgraded, you cannot downgrade.
NOTICE: If you have upgraded to TI84+CE OS 5.4, you cannot use any of these programs because TI said so. If you try to run any of them, the calc will throw an "INVALID" error. You need to use AsmComp(prgmSOURCE,prgmNEW to run assembly programs.
DOWNGRADE NOTE: If you have upgraded to 5.6, a tutorial is located here to downgrade from OS 5.5+. This will work with any boot code up to 5.3.1.
There are all sorts of small assembly programs that you can create simply using the calculator's built-in assembly commands (specifically, Asm84CEPrgm) along with the appropriate hexadecimal code. In order to run a program, you need to use the Asm( command, where Asm(prgmPROGNAME is the program that contains the hexadecimal code.
As a word of caution, when entering in the hexadecimal, you need to be very careful that you type it in exactly as you see it. If there is a single incorrect character, the calculator might crash and reset your RAM when you turn it on again. We have tested the hexadecimal codes to make sure they work, but it's up to you to enter them in correctly.
These hexcodes only work on the TI-84 Plus CE. See the following pages for monochrome calcs or the CSE.
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Table of Contents
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Turn Off LCD
:AsmPrgm84CE
:3E01321900E3C9Turn On LCD
:AsmPrgm84CE
:3E09321900E3C9This is the same as the code for turning off the LCD, except that the 01 is a 09 instead.
Set LCD Brightness
:Asm84CEPrgm
:CD500F02CD700F02322400F6C9Set the brightness to a value between 0 and 255 stored in Ans, 255 is low, 0 is high.
Enable Lowercase Letters
:Asm84CEPrgm
:FDCB24DEC9High-Contrast Screen
:Asm84CEPrgm211808F874364436216C3601C9This will inverse the whole screen to high-contrast mode. This will make it easier to look at the screen during the night.
Credit: MateoConLechuga
Toggle Program Mode
:Asm84CEPrgm
:FD7E08EE02FD7708C9When used in a program, it allows you to use Archive and UnArchive on other programs. warning: Make sure to switch back to "program mode" when you're done by running the program again.
Screen to Graph [TO DO]
Quick Key
:Asm84CEPrgm
:3A8705D0CD080B02CD300F02C9Text Inverse
:Asm84CEPrgm
:FD7E05EE08FD7705C9This will switch from normal text mode to inverse (white text on black background) and vice versa.
Lowercase
Lowercase On
Asm84CEPrgm
:FDCB24DEC9Lowercase Off
Asm84CEPrgm
:FDCB249EC9Lowercase Toggle
Asm84CEPrgm
:FD7E24EE08FD7724C9This will toggle lowercase on or off
Fill Screen [TO DO]
LCD Clear
Asm84CEPrgm
:CD101A02C9Clears the LCD.
LCD Clear and redraw Status Bar
Asm84CEPrgm
:CD101A02CD3C1A02C9Same as LCD Clear, but redraws the Status bar.
White
Asm84CEPrgm
:210000D436FFE5D11301FF5702EDB0C9Black
Asm84CEPrgm
:210000D43600E5D11301FF5702EDB0C9Fill Screen with color value in Ans (0-255, from xLibC palette)
Asm84CEPrgm
:CD500F02CD700F02320000D4210000D4E5D11301FF5702EDB0C9Border [TO DO]
White Border [TO DO]
Black Border, Clear Inside [TO DO]
Invert Screen [TO DO]
Change brightness level
Set Brightness
Asm84CEPrgm
:CD500F02CD700F02322400F6C9Set the brightness to a value between 0 and 255 stored in Ans, 255 is low, 0 is high.
Decrease Brightness
Asm84CEPrgm
:3A2400F63C322400F6C9Decrease the brightness by 1. Run many times to see a noticeable difference.
Increase Brightness
Asm84CEPrgm
:3A2400F63D322400F6C9Increase the brightness by 1. Run many times to see a noticeable difference.
Run Indicator
Run Indicator Off
Asm84CEPrgm
:CD480802C9Run Indicator On
Asm84CEPrgm
:CD440802C9Toggle Run Indicator
Asm84CEPrgm
:FD7E12EE01FD7712C9Note that when this routine turns the run indicator off, it doesn't erase the run indicator, it simply stops it.
APD
Disable APD
Asm84CEPrgm
:CD341102C9Disables Automatic Power Down on the TI-84 Plus CE.
Enable APD
Asm84CEPrgm
:CD381102C9Enables Automatic Power Down on the TI-84 Plus CE.
Miscellaneous
Turn Cursor Off
Asm84CEPrgm
:FDCB0CE6C9This is harmless, but it stops displaying that blinking cursor :D Just press [2nd][MODE] to put it back to normal. What, jokes are allowed, right?
Turn Cursor On
Asm84CEPrgm
:FDCB0CA6C9Draw Ti Logo
Asm84CEPrgm
:CD001B02C9Draws the TI logo
Dark Mode
Asm84CEPrgm
:3E21B7211808F8CD9EA8D16C36012E0D7EE6F020FB2DCB5620FC6C77C906031717177710FAC9Sets the program to "dark mode" where all colors are inverted until the next power off.
Error
Asm84CEPrgm
:CD500F02CD700F02CD900702C9This code will cause an error to be thrown, based on the value in Ans. The values correspond to the ones found here. Use your browser's search tool to look for "E_Overflow" which is Error 1. If you are using a Windows or Chromebook, pressing Control+F will bring up the search tool. On a Mac, pressing Command+F will bring up the search tool. By default, there is no Goto option unless you add 128 to the values. So for example, for a divide by zero error with a goto option, use 130 as the error code.