|Letter v2.3 ©
Copyright 2000: Emir
Welcome to Letter v2.3 User
This guide will help you use Letter v2.3 - a TI-83/83+ ASM
ION text processing program.
||Some of the special characters
||The LOAD screen.
||Use Letter 2.3 to take any notes...
||Let the Letter remember your
Program: Letter v2.3
Description: A TI-83/83+ ASM ION text processing program
Code: ASM SQUISHED ION compatible
Size: 1573/1633 bytes
Author: Emir Sakic
This is a TI-83/83+ assembly program
that allows you writing text on TI-83/83+
with lower and upper case letters and all ASCII
chars available on TI-83/83+.
The Letter v2.3 features:
- Capital and small letters
- All special chars available on TI-83/83+ like @
& # ~ \ % and many more
- Fast delete, one line and total clear
- Saving and opening as many files as you want
- Deleting files
- Changing contrast showing the contrast indicator
- Very nice interface both on the main screen and
- Batteries friendly.
How to use:
Make sure that you have ION
installed on your TI-83/83+.
- Send letter.83p / letter.8xp
to your calculator. Start ION
and select Letter v2.3.
- You will see the Letter logo for
couple of seconds.
You can also skip it pressing [ENTER].
- You are coming to the home screen with a cursor
in the upper left corner.
Now you can write lower
and upper case letters, numbers
and other chars, delete
it, save and open files.
- Choose case pressing the [Y=]
- Press and hold [LEFT] or [RIGHT]
keys to choose special character, and
type it pressing the [WINDOW] key.
- Change contrast pressing [UP]
or [DOWN] key.
- Save your files pressing the
[ZOOM] key. You will be prompted to SAVE
- Type the name of file and
press [ENTER]. File is saved now.
- Open your files pressing the
[TRACE] key. You will be prompted to LOAD
- Choose the file you want to
load pressing the [RIGHT] key and press [ENTER].
File is loaded now.
- Delete a file pressing the [Y=]
key on the LOAD screen.
- Exit the LOAD screen without
loading pressing the [GRAPH] key.
- Quit pressing the [GRAPH]
The Letter v2.3 uses the TI-83/83+
home screen with the 16x8 character
Write important stuff (formulas, tel. numbers,
addresses or anything else), save it and open whenever
you need it.
Files you save are protected
and can be found only by the Letter v2.3
or by TI-83/83+ OS memory delete option.
Note that the Letter v2.3 is not written
to help you cheat. Its purpose is to remind. :)
Saved files are saved like any usual program on
TI-83/83+ and take 133-138 / 136-141 bytes each
depending on the file name.
They get prefix 'let' in the name.
So if you save a file and type TEST on the SAVE screen its name will be letTEST.
If you want to delete some file later you can do it like you would delete any other TI-83/83+ program.
You can delete files directly within the Letter v2.3 from the LOAD screen too.
An archived file on TI-83 Plus can be loaded, but you can't save it over or delete. If you try you will get an "Unarchive file!" message.
Read the notes below about archiving the Letter itself!
The Letter v2.3 is a TI-83/83+
program written in Assembly. There
is always a risk executing an ASM code.
You should "Back Up"
all your important data before you start an ASM
I am not responsible at any way if this
program causes your calculator to crash and lose
Anyway it's been tested carefully
and there shouldn't be any bugs at all.
If you "Back Up" the files it should be
remembered that all files must be loaded after the
Letter v2.3. If not the RAM will crash if you try to
delete a file within the Letter v2.3.
Due to this fact you should never execute Letter if it's
archived on TI-83 Plus when you intend to delete a file.
It's safest to always keep the Letter in RAM
at least when you have files saved on the calculator.
This program is written by Emir Sakic, it is Free
Ware and may be copied freely.
Anyone interested in the Letter v2.3 source
code can request it by mail.
If you edit the program, please keep my copyright
notice at the exit of the program, along with your own.
The letter.zip consists of the
||The main TI-83 program for ION.
||The main TI-83 Plus program for ION.
||The text help file.
||Images used in the UserGuide.
-17.12.2000. v2.3 for TI-83/83+ ION and MirageOS. This
Size: 1573/1633 bytes.
-10.12.2000. v2.3 for TI-OS, AShell and SOS.
Searching routine improved and file format
Features contrast changing, deleting files and exiting
the LOAD screen.
Better batteries saving.
Size: 1642 bytes.
-17.09.2000. v2.2 for TI-83+ MirageOS.
Same as v2.1 for ION but assembled
especially for MirageOS including a program icon.
MirageOS hotkey combinations available.
Size: 1315 bytes.
-16.09.2000. v2.1 for ION.
ION compatible both for TI-83 and TI-83+.
Uses ION built-in routine to search for program files.
Program size now: TI-83 version: 1279,
TI-83+ version: 1286
-26.03.2000. v2.0 for SOS.
Version name dumped to 2.0 because it
now uses a totally different way for writing and saving
Program size is now only 1295 bytes.
-10.01.1999. v1.0. First version.
Size 3526 bytes. Big and unpractical.
Could save only one file.
1. Scrolling screen support.
Files will not be limited at 111 chars and you will be
able to scroll text up and down and save file with any
size you want.
2. Improved input routine that would
allow prompt back without deleting.
3. You tell me. :)
-Dan Englender and Kouri Rosenberg
for their help on previous versions.
for revising the html help file.
If you have any suggestions or comments please
e-mail me on firstname.lastname@example.org