Years ago I got ahold of one of these old BetaBrite signs from a business that closed and left behind a bunch of junk. The hand-held remote control was not included, and I had no access to the official PC software, so I had to implement the serial programming protocol myself. I did find some existing implementations in C and Visual Basic and such, but I was totally unsatisfied with their quality, so I went ahead and wrote my own in Python. Thankfully the protocol documentation is very complete and detailed. The sign does have some subtle undocumented idosyncrasies, but it’s not too badly-behaved.
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