Function 06h Direct Console I/O Get character from STDIN; echo character to STDOUT entry AH 06h DL 0FFh for console input, or 00h-0FEh for console output return ZF set (1) = no character clear (0) = character recieved AL character note 1) Extended ASCII codes require two function calls. The first call returns 00h to indicate the next call will return an extended code. 2) If DL is not 0FFh, DL is assumed to have a valid character that is output to STDOUT. 3) This function does not check for Ctrl-C or Ctrl-PrtSc. 4) Does not echo input to screen 5) If I/O is redirected, EOF or disk full cannot be detected.
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