117 lines
2.8 KiB
HTML
117 lines
2.8 KiB
HTML
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content="text-html; charset=Windows-1252">
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<title>INT 21,44,0 / IOCTL,0 - Get Device Information</title>
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<meta name="FORMATTER" content="Microsoft FrontPage 2.0">
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<h1><a name="kap_interrupt_2110"></a>INT 21,44,0 / IOCTL,0 - Get
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Device Information</h1>
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<p> AH = 44h</p>
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<p> AL = 00</p>
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<p> BX = handle (must be an opened device)</p>
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<p> on return</p>
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<p> AX = error code if CF set (see ~DOS ERROR CODES~)</p>
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<p> DX = device information (see tables below)</p>
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<p> ¦F¦E¦D¦C¦B¦A-8¦7¦6¦5-0¦ DX Block Device Information</p>
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<p> ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ +----- drive number (0=A:,1=B:)</p>
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<p> ¦ ¦ ¦ ¦ ¦ ¦ ¦ +------- 0 = file has been written</p>
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<p> ¦ ¦ ¦ ¦ ¦ ¦ +-------- 0 = disk file; 1 = character
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device</p>
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<p> ¦ ¦ ¦ ¦ ¦ +---------- reserved, must be zero</p>
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<p> ¦ ¦ ¦ ¦ +------------ 1 = media not removable</p>
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<p> ¦ ¦ ¦ +------------- 1 = network device (DOS 3.x+)</p>
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<p> ¦ ¦ +-------------- 1 = reserved</p>
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<p> ¦ +--------------- 1 = don't update file time or date (DOS
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4.x+)</p>
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<p> +---------------- 1 = file is remote (DOS 3.x+)</p>
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<p> ¦F¦E¦D¦C¦B¦A-8¦7¦6¦5¦4¦3¦2¦1¦0¦ DX Character
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Device Information</p>
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<p> ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ +---- 1 = standard
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input device</p>
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<p> ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ +---- 1 = standard output
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device</p>
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<p> ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ +---- 1 = NUL device</p>
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<p> ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ +---- 1 = clock device</p>
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<p> ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ +---- uses DOS ~INT 29~ for fast
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character output</p>
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<p> ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ +---- 1 = binary mode, 0 = translated</p>
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<p> ¦ ¦ ¦ ¦ ¦ ¦ ¦ +---- 0 = end of file on input</p>
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<p> ¦ ¦ ¦ ¦ ¦ ¦ +---- 1 = character device, 0 if disk file</p>
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<p> ¦ ¦ ¦ ¦ ¦ +----- reserved</p>
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<p> ¦ ¦ ¦ ¦ +------ 1 = media not removable</p>
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<p> ¦ ¦ ¦ +------ 1 = network device (DOS 3.x+)</p>
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<p> ¦ ¦ +------ reserved</p>
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<p> ¦ +------ 1 = supports IOCTL, via functions 2 & 3</p>
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<p> +------ reserved</p>
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<p> - BIT 7 of register DX can be used to detect if STDIN/STDOUT
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is</p>
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<p> redirected to/from disk; if a call to this function has DX
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BIT 7</p>
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<p> set it's not redirected from/to disk; if it's clear then it
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is</p>
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<p> redirected to/from disk</p>
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<p> - BIT B of register DX can be used to determine if a drive is</p>
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<p> removable.</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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