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<TITLE>Int 21/AH=06h/DL=FFh
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Int 21/AH=06h/DL=FFh - DOS 1+ - DIRECT CONSOLE INPUT -
AH = 06h
DL = FFh
Return: ZF set if no character available
AL = 00h
ZF clear if character available
AL = character read
Notes: ^C/^Break are NOT checked
if the returned character is 00h, the user pressed a key with an
extended keycode, which will be returned by the next call of this
function
">
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<h2>Int 21/AH=06h/DL=FFh
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<h3><font color=#C00040>DOS 1+ - DIRECT CONSOLE INPUT</font></h3>
<PRE>
AH = 06h
DL = FFh<br>
<p><b>Return:</b><br>ZF set if no character available
AL = 00h
ZF clear if character available
AL = character read
</PRE>
<p><b>Notes:</b>
^C/^Break are NOT checked.
If the returned character is 00h, the user pressed a key with an
extended keycode, which will be returned by the next call of this
function.
This function reads from standard input, which is always the keyboard
under DOS 1.x, but may be redirected under DOS 2+.
Although the return of AL=00h when no characters are available is not
documented, some programs rely on this behavior
<p><b>See Also:</b>
<a href="rb-2565.htm" tppabs="http://www.ctyme.com/intr/rb-2565.htm">AH=0Bh</a>
<p>
<b>Category: <a href="cat-010.htm" tppabs="http://www.ctyme.com/intr/cat-010.htm">
DOS Kernel</a>
- <a href="int-21.htm" tppabs="http://www.ctyme.com/intr/int-21.htm">
Int 21h</a>
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D</a>
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