If you have ever been on IRC for long enough, chances are some channel you were on had a bot on it. Some bots are silly, they respond to phrases, often stuffed with inside jokes. Other bots are useful, they will tell you when things like code is pushed. Some …
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Powering the TI 89 (and many other calculators) with lithium batteries
The TI 89, like most calculators, uses AAA sized batteries. These vary from 1.5v in the fully charged disposable variants, to 1.2V NiMH rechargable batteries. I wanted to replace the batteries with a rechargable solution that could charge while the device is being used.
Conveniently, 5v fits nicely …
Getting a dos machine on the network, and getting dosbox to talk it it
I was trying to play multiplayer doom, and not chocolate doom, where one of the machines is a dosbox and the other is a computer I built after a few months of collecting parts from recycling places. The specs:
- Pentium MMX 233 (I found this one taped down to a …
TI-89 Hacking log: Entry 2
I found it
http://tict.ticalc.org/docs/J89hw.txt
Yes it! I found it! The document of glory!
/* meanwhile, here's some hackery with i2c on the TI-89 (because I didn't even bother with that untested code from 2004 on the archive) */ #include <tigcclib.h> /* Notes The lines …
TI-89 Hacking log: Entry 1
Goals
- Replace the batteries with LiPo, tp4056+protection (is the protection needed?) with small slit on the bottom for charging
- Add microcontroller, with Ti-Link interface
- Switch to turn on/off Ti-Link connection with the microcontroller
- Program to check battery level, charging status, passthrough UART of MCU
- Switch to turn on …