Tilp.info
Title
Welcome to the TiLP web site
Description
I have had Linux installed at home since 1997 and I am working more and more with Linux. During my 3 years in preparatory classes, I have made some TI92 PC link cables and provided a program to use them (WinLink92 for Windows 95) for my friends who have TI92s as well as myself. Unfortunately, I couldn't find a similar program for Linux that would work with my TI92 link cable and as far as I could tell from ticalc.org, the need existed.
A first solution was WINE (i.e. run WinLink92 under WINE). This works but this did not constitute an efficient solution. As I am fond of electronics (digital electronics and micro-processors/controllers) and computer science (Pascal and C/C++ programming), I decided to write one. All that remained was to find the protocol (hardware and software specifications) providing the communication between the TI calculator and the PC. Fortunately, a friend had got these specs. Unfortunately, these were incomplete and did not cover the hardware protocol. Thanks to some electronics, I managed to complete these specs.
how?
My father was lucky enough to have an oscilloscope which allowed me to get a general idea of the signals. The problem is that an oscilloscope does not have any memory and so cannot store a history of the signals. So, I got to work and built a sort of 2 channel oscilloscope with memory (actually a logic analyser) which allowed me to start sampling at any time and record them to look at later. The first version was based on an Intel 8032 microcontroller running at 12MHz (1 million instructions per second) and was not fast enough to track the signal.
Contact
- Julien BLACHE
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- COLMAR
- FR 68000
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- +33.123456789
