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X-Hacker.org- Assembly Language - <b>function 03h (3) auxiliary character input</b>
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Function 03h (3) Auxiliary Character Input
Waits for a character from the standard auxiliary device. Checks for
Ctrl-Break and Ctrl-C.
On entry: AH 03h
Returns: AL Character read
--------------------------------------------------------------------------
This function inputs a character into AL from the standard auxiliary
device, which is normally the first serial port. (At startup, PC-DOS
initializes the first serial port to 2400 baud, eight data bits, one
stop bit, and no parity.)
Notes: If a Ctrl-Break (Ctrl-C) is detected, an INT 23h is
generated.
Input is unbuffered and not interrupt-driven; if
your program can't process the characters fast
enough, data may be lost.
This function does not monitor the status of the
serial port. For greater control, use the ROM-BIOS
services (Interrupt 14h).
See Also: INT 14h, 03h 3Fh
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