How can I read a character without echoing it to the screen, and without waiting for the user to press the Enter key?
In Assembly language, execute INT 21 AH=8; AL is returned with the character from standard input (possibly redirected). If you don't want to allow redirection, or you want to capture Ctrl-C and other special keys, use INT 16 AH=10; this will return the scan code in AH and ASCII code (if possible) in AL, but AL=E0 with AH nonzero indicates that one of the gray "extended" keys was pressed. (If your BIOS doesn't support the extended keyboard, use INT 16 AH=0 not 10.)
In Assembly language, execute INT 21 AH=8; AL is returned with the character from standard input (possibly redirected). If you don't want to allow redirection, or you want to capture Ctrl-C and other special keys, use INT 16 AH=10; this will return the scan code in AH and ASCII code (if possible) in AL, but AL=E0 with AH nonzero indicates that one of the gray "extended" keys was pressed. (If your BIOS doesn't support the extended keyboard, use INT 16 AH=0 not 10.)
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