The first TI calculator I got was a TI-85 in July 1997. Boy, what a mistake. The TI-86 came out maybe one month later. Of course, at the time I had no idea of the capabilities of it anyway.

Around January or February, I discovered assembly when one of my friends at school who also had a TI-85 gave me a memory backup with ZShell. At the time, I thought this was amazing. Still, it was relatively limited in capability. Around the same time, I got a TI-Graph Link, and discovered the internet scene, with websites such as and TI-Files. I subscribed to the 85 assembly mailing list, even though I never so much as made a "hello, world" program for it.

In March, I got a TI-86, and things really picked up from there. I had been programming in TI-BASIC since around September, and really wanted to learn assembly. I downloaded Assembly Studio 86, a really cool developmental tool, and began learning z80 assembly around May, 1998.

After a few weeks, I had learned enough to make my first game, Drugwars. It was basically the same as my TI-BASIC version, which I had made earlier. Still, I learned a lot from making it.

For most of the summer, I was out of town doing various things, and when I got back I was kind of rusty in z80, but I eventually got back into it. While on vacation in August, I began working on On86, a really really cool password program which activates whenever you turn on the TI-86.

For my birthday, I got a TI-89. That was reeeeally cool. Although I didn't need it, it enhanced math class by a ton and a half. It has around 650k of storage space, plus more vertical pixels than the TI-82\83 contain horizontal pixels. Not to mention the symbolic manipulation and 3D graphing! I've learned enough 68000 assembly to port crapong, a TI-89 game, to the TI-86.

In June 1999, TI emailed me about being a "TI-83+ SDK beta-tester". What this resulted in was they gave me a free TI-83+ and lots of documentation and tools for programming the TI-83+. For a long time I didn't make use of this, but then in June 2001 I became a Z80 programming contractor for TI, writing them a math game called Decimal Defender for the TI-83+ and TI-83+ Silver Edition. Supposedly this application will be included in all new TI-83+'s, but in any case, it's available on TI's website.

For a complete listing of all my released TI-related files, click here. For my newer programs, I've begun using my own customized compiler called cz80. You can also download the include files I've been using, which were created by Clem Vasseur. The following is a highlight of the asm programs I am currently working on or have already released.

My TI-86 asm programs
Name & Picture Description
iShell 2.01


A full-featured interface using Aaron Curtis's Yet Another Shell 2.0. It features renameable folders, deleting, hiding, reorganizing, password shutdown, memory locking, an options menu which allows you to adjust contrast, shutdown, take screenshots, or escape back to the shell while running a program, and more.
Advanced Text Editor v1.01


An extension of Asmide86 which allows for the editing of basic programs, TextView files, and ZAC asm source. They can be executed/viewed/compiled directly from the editor. Features include word wrap, case-insensitive searching, and text selection.
Megacar 1.1


A fast-paced birds-eye-view racing game based on Thomas Fernique's TI-89 version. It features fast black and white scrolling, best race/lap with initials, external levels, and a Windows level editor made by Kirk Meyer.

Paul Marks has also ported Megacar to the TI-83+.

Diamonds 2.0


A cool arkanoid game sorta like breakout except you control the ball. Features grayscale, saving games, high score, speed control, external levels, and more. Levels can be found in the archive.
Diamonds Level Editor 2.0

Diamonds Level Editor

On-calc level editor that allows editing and creation of Diamonds levels.
On86 3.1


An awesome password program which no one should be without. It installs a password on your calc which activates every time you turn on your TI-86 normally. The password can be up to 15 keys long and the program even has a user-inputted name for the "Property of" message. All this and the whole program isn't even 700 bytes!
Drugwars 3.2


A drug buying and selling game sort of like the stock market. Version 3.2 features a save/resume option, a high score table, a graphical menu system, and more. I suggest you check it out!
Cheater's Toolbox 2.0

Cheater's Toolbox

A utility that allows you to cheat in ztetris and Insane Game. The purpose of course is to annihilate people in multiplayer mode :-)
Calendar 2.2


A calendar program made by myself and Ahmed El-Helw.
Mastermind 1.1


The classic puzzle game of mastermind brought to the TI-86. You have 7 chances to correctly predict 4 hidden balls.
Crapong v1.4


A port of a TI-89 game. The classic game of pong, with the added bonus of guns. A pretty fun game, and my first game which actually uses graphics.