From someone who set out with his 40-year-old SX-64 to visit an equally ancient Commodore 64 BBS - not old-school with a modem, but through a DIY null-modem cable hooked up over the internet.
It turned out to be much more difficult than expected, with all sorts of cable shenanigans that of course refused to work - and ultimately even resulted in the SX-64 needing repairs.
https://www.youtube.com/watch?v=3csC9z7oPSY
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