Tutorial 21
Enabling Lowercase letters

Overview
    Are you tired of typing only uppercase letters at the homescreen, program editor, etc. on the TI-83 Plus? I am. So let's make a program to solve this problem. The following program will enable the TI-83 Plus' lowercase Alpha feature.

Programming

.NOLIST
#define equ .equ
#define EQU .equ
#define END .end
#include "ti83plusAsm.inc" ;Remember, we're using an include file, though in this program, an include file is not nessasary because no ROM calls are used.
.LIST

.org 9D95h

set 3,(iy+$24) ;Set the lowercase alpha
ret ;Return from program

.end
END

    Now when you hit the Alpha key twice, the cursor becomes an "a" instead of the "A". Thus when you type with a lowercase Alpha key enabled, the letters you type will be lowercase.

    But what if you want to reset the lowercase alpha key if you don't want to type in lowercase? Simple, use the "res" command to reset that flag. Here, I'll show you:

.NOLIST
#define equ .equ

#define EQU .equ
#define END .end
#include "ti83plusAsm.inc"
.LIST

.org 9D95h

res 3,(iy+$24) ;Notice that we are Reseting this text flag.
ret

.end
END

Then, you can run this program to reset the lowercase alpha. Or you could just reset your defaults form your Mem Mgmt screen. =)

Tutorial 22

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