71 lines
1.7 KiB
HTML
71 lines
1.7 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 14,5 - Extended Communication Port Control (PS/2 &
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later systems)</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_0740"></a>INT 14,5 - Extended
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Communication Port Control (PS/2 & later systems)</h1>
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<p> AH = 05</p>
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<p> AL = read or write modem control register</p>
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<p> = 00 read modem control register</p>
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<p> = 01 read modem control register</p>
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<p> DX = zero based serial port number (0-1) (0-3 for AT)</p>
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<p> BL = modem control register</p>
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<p> ¦7¦6¦5¦4¦3¦2¦1¦0¦ BL</p>
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<p> ¦ ¦ ¦ ¦ ¦ ¦ ¦ +---- 1 = activate data terminal ready</p>
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<p> ¦ ¦ ¦ ¦ ¦ ¦ +----- 1 = activate request to send</p>
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<p> ¦ ¦ ¦ ¦ ¦ +------ OUT1</p>
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<p> ¦ ¦ ¦ ¦ +------- OUT2</p>
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<p> ¦ ¦ ¦ +-------- 0 = normal, 1 = loopback test</p>
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<p> +------------- reserved, forced to zero</p>
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<p> on return:</p>
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<p> AH = port status</p>
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<p> AL = modem status</p>
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<p> BL = ~UART~ modem control register</p>
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<p> - for status bits see ~INT 14,STATUS~</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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