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Ah! You got me down the right rabbit hole. I think I was actually using INTERSVR and INTERLNK but yes, must have been a LapLink cable.

https://en.wikipedia.org/wiki/List_of_DOS_commands#INTERSVR_...




That was magic for me the first time I transferred a file between computers. I didn't have to re-type my code! What a time to be alive.


Before Arduino and the analog Square reader, the parasitic-powered serial port wireless X-10 Firecracker seemed magic level to me.

https://www.x10.com/products/cm17a




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