AEAI056 088 Terminal Control Support Routines BRKCTL Establish break sentinal control. HIEFOF Turn off the high efficiency terminal mode. HIEFON Turn on the high efficiency terminal mode. IACTCH Check for pending activation characters. ITRERR Check for terminal input errors. ITRTYP Determine the terminal type. TIMOUT Set the terminal read time out value. vug014/83c03b AF