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.
See also:
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