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Working the International Space Station from a Commodore 64
Using the ISS digipeater from a Pakratt PK-232MBX TNC, Yaesu FTM7250 and Commodore 64
The C64 obviously doesn’t have a GPS so I just found the co-ordinates of the local Home Bargains from google maps so that people can find top brands at bottom prices. This shows that even on VHF, broadcasting from the UK to ISS for it to rebroadcast covers a huge area of Europe, far more than the 15 miles or so we were managing on our local transmit test. so here is the same pk232 pakratt connected to a Psion 5MX; a whopping increase to 16mb RAM whilst going down to a small portable device with an LCD screen allowing it to be run off 2 AA batteries!
Or read this on Hacker News