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Int 21 Fn 0A - DOS 1+ - Buffered Input [D]
AH = 0Ah
DS:DX -> buffer (see below)
Return: buffer filled with user input
Notes: Break are checked, and INT 23 is called if either detected
reads from standard input, which may be redirected under DOS 2+
if the maximum buffer size (see below) is set to 00h, this call returns
immediately without reading any input
See Also: AH=0Ch,INT 2F/AX=4810h
Format of input buffer:
Offset Size Description
00h BYTE maximum characters buffer can hold
01h BYTE (input) number of chars from last input which may be recalled
(return) number of characters actually read, excluding CR
02h N BYTEs actual characters read, including the final carriage return
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