64 lines
1.5 KiB
HTML
64 lines
1.5 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type"
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content="text-html; charset=Windows-1252">
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<title>INT 21,6 - Direct Console I/O</title>
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<meta name="FORMATTER" content="Microsoft FrontPage 2.0">
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</head>
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<body>
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<h1><a name="kap_interrupt_1520"></a>INT 21,6 - Direct Console
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I/O</h1>
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<p> AH = 06</p>
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<p> DL = (0-FE) character to output</p>
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<p> = FF if console input request</p>
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<p> on return:</p>
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<p> AL = input character if console input request (DL=FF)</p>
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<p> ZF = 0 if console request character available (in AL)</p>
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<p> = 1 if no character is ready, and function request</p>
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<p> was console input</p>
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<p> - reads from or writes to the console device depending on</p>
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<p> the value of DL</p>
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<p> - cannot output character FF (DL=FF indicates read function)</p>
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<p> - for console read, no echo is produced</p>
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<p> - returns 0 for extended keystroke, then function must be</p>
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<p> called again to return scan code</p>
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<p> - ignores Ctrl-Break and Ctrl-PrtSc</p>
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<hr>
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<table border="0" width="100%" cols="3">
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<tr>
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<td width="33%">Zurück zum <a href="inte1at0.htm">Interrupt
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Info</a>. </td>
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<td align="center" width="33%"><a
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href="mailto:Roger.Morgan@htl-steyr.ac.at">Roger Morgan</a>
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/ 1998 </td>
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<td align="right" width="33%"><font size="1">L.Änderung <!--webbot
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bot="Timestamp" s-type="EDITED" s-format="%d.%m.%y"
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startspan -->29.03.99<!--webbot bot="Timestamp" endspan
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i-checksum="13964" --> </font></td>
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</tr>
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</table>
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</body>
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</html>
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