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when toggle format what by license comment
Aug 26, 2018 at 20:50 history edited DrSheldon CC BY-SA 4.0
fix old Mac
Aug 26, 2018 at 20:31 comment added tofro RS-485 is not electrically-compatible with RS-232. RS-485 uses differential signals and requires the line drivers to be able to go high-Z in order to be able to use single-line half-duplex transmission and multipoint connectivity. The older Mac's serial port was actually an RS-422 port.
Aug 26, 2018 at 18:15 history edited DrSheldon CC BY-SA 4.0
specific solution
Aug 26, 2018 at 17:20 history edited DrSheldon CC BY-SA 4.0
materials needed, general solution
Aug 26, 2018 at 2:00 comment added manassehkatz-Moving 2 Codidact Good answer, though I disagree with "By 1990, most systems were sophisticated enough to buffer incoming characters, so flow control was seldom used". While video terminals generally didn't need handshaking at that time, printers, modems, multiplexers and many other devices still used handshaking quite a bit.
Aug 25, 2018 at 4:31 history answered DrSheldon CC BY-SA 4.0