87 lines
2.0 KiB
HTML
87 lines
2.0 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 15,C0 - Return System Configuration Parameters (PS/2
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only)</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_1020"></a>INT 15,C0 - Return System
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Configuration Parameters (PS/2 only)</h1>
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<p> AH = C0</p>
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<p> on return:</p>
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<p> CF = 0 if successful</p>
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<p> = 1 if error</p>
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<p> AH = when CF set, 80h for PC & PCjr, 86h for XT</p>
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<p> (BIOS after 11/8/82) and AT (BIOS after 1/10/84)</p>
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<p> ES:BX = pointer to system descriptor table in ROM of the
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format:</p>
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<p> % Offset Size Description</p>
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<p> 00 word length of descriptor (8 minimum)</p>
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<p> 02 byte model byte (same as F000:FFFE, not reliable)</p>
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<p> 03 byte secondary model byte</p>
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<p> 04 byte BIOS revision level (zero based)</p>
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<p> 05 byte feature information, see below</p>
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<p> 06 dword reserved</p>
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<p> % Feature Information</p>
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<p> ¦7¦6¦5¦4¦3¦2¦1¦0¦ Feature Byte</p>
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<p> ¦ ¦ ¦ ¦ ¦ ¦ ¦ +---- reserved</p>
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<p> ¦ ¦ ¦ ¦ ¦ ¦ +----- 0=PC bus, 1=Micro Channel</p>
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<p> ¦ ¦ ¦ ¦ ¦ +------ Extended BIOS Data Area
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(~EBDA~)allocated</p>
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<p> ¦ ¦ ¦ ¦ +------- wait for external event supported</p>
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<p> ¦ ¦ ¦ +-------- ~INT 15,4F~ used (kbd intercept)</p>
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<p> ¦ ¦ +--------- ~RTC~ present</p>
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<p> ¦ +---------- 2nd ~8259~ present</p>
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<p> +----------- DMA channel 3 used by fixed disk BIOS</p>
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<p> - see ~MACHINE ID~</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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