My old s-100 ~1978-1985 could use the 50 (teletype) and "Kansas City Standard" at 300baud but was capable to 2400baud; so 1200 never was "the" baud rate of choice. Through the 1970's I worked on many ASCII terminals that used DEC, Wyse, and IBM protocols and could be set to communicate at least up to 9600 and some may have been capable up to ~32,000.
jwzumwalt
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