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@alderson @not2b @tevo @mcc And originally TECO used "altmode" rather than escape. At the time, altmode and escape were octal 175 and 176, from before ASCII gained the lower case and symbols in columns 6 and 7. The models 33 and 35 Teletypes had an altmode key that sent 175, and the TOPS-10 monitor performed translations of 175 and 176 to octal 033 (Escape from the 1965 revision of the ASCII standard).
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