TI92

This is old stuff, when I used to hack with the Texas Instruments TI92 calculator.

• Download Plink 1.1 (MS/DOS, 52 KB) or its sources (Turbo Pascal)
  A freeware program that enables you to communicate with your TI92 from your PC. Features : parallel and graph link cable support, backup / group / multiple variable files, screen dump to PCX, text import / export / edit, and more !
  
  Note : by the time I wrote this software, there was nothing but ugly hacks or the poor Texas software to link the calculator with the PC. I still happend to receive some use e-mail. It runs well on Windows 95/NT DOS emulation, despite heavy I/O brute access.
  
  
  
• Protocol : HTML (english) | Text (english) | Text (french)
  File format : HTML (english) | Text (english)
  Most of my work on the TI92 was motivated by reverse engineering. I took over some people first attempt, and with patience managed to figure out all the pieces together. Of course, I implemented some undocumented features that where not in the TI's link software itself, with the help of the people which disassembled the calculator ROM. Sharing doc and code was not in the air by '97, so I even took the time to provide a french translation (because I have been asked for) to enlarge the diffusion of this doc.
  
  
  
• The unofficial site, ticalc.org, has tremendously grown. Starting from a hacker site for a handful of mad people, it's now a full fledged portal backing TI official site (this is actually the right place to go !).
  
  
  
• I also managed to overclock my TI92. Sadly, the site containing the hack instructions has been offline for a long time. It involved a fast and steady hand to unsolder and replace a 1mm SMD condensator without melting the SMD-crowded neighborhood. The frequency raised from 8MHz to 27Mhz. Most games written in assembly became unplayable, and of course now I run out of batteries in two hours (4 x AA). For the curious ones, the TI92 embeds a modified MC68010. Here is a picture of the hacked victim : hires full layout (714 KB JPEG, 2300x1200) and hack close-up (31 KB JPEG, 400x200).