30 Apr '17, 2pm

TI 99/4A Weather Station

If you still have a drawer full of slap bracelets from the 1990s because, you know, they might come back, then you’ll appreciate [Vorticon’s] latest project. Sure, we see lots of weather stations, but this one is controlled by a TI 99/4A computer. This home computer from the 1980s was actually ahead of its time with a 16-bit processor. The sensors use Xbee modules and an Arduino Uno. Of course, the Uno has more power than the TI computer, but that’s not really the point, right? He’s made a series of videos detailing the construction (you can see the first one below, but there are five, so far). Normally, talking serial to the Arduino would require assembly language on the TI computer. However, TI hacker [Rich Gilbertson] already fixed that. He created Rich Extended BASIC (RxB), which has a CALL IO statement that was perfect for [Vorticon’s] needs. The TMS9900 CPU had a nov...

Full article: http://hackaday.com/2017/04/30/ti-994a-weather-station/

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