Int 21H Function 0AH
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Description: Buffered Keyboard Input
Reads a string of bytes from the standard input device, up to and
including an ASCII carriage return (0DH), and places them in a user-
designated buffer. The characters are echoed to the standard output
device. Input may be redirected (if input has been redirected, there
is no way to detect EOF).
Input Output
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AH=0AH Nothing
DS:DX=segment:offset of buffer
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