102 lines
1.9 KiB
C
102 lines
1.9 KiB
C
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/*++
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Copyright (c) 1990, 1991 Microsoft Corporation
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Module Name:
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hwapm.c
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Abstract:
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Author:
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Environment:
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Real mode.
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Revision History:
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--*/
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#include "hwdetect.h"
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#include <string.h>
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#if defined(NEC_98)
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#define _PNP_POWER_ 1
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#endif
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#if _PNP_POWER_
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#include "apm.h"
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#if defined(NEC_98)
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//
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// interface api numbers
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//
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#define PC98_APM_INSTALLATION_CHECK 0x9A00
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#define PC98_APM_REAL_MODE_CONNECT 0x9A01
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#define PC98_APM_PROTECT_MODE_16bit_CONNECT 0x9A02
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#define PC98_APM_DISCONNECT 0x9A04
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#define PC98_APM_DRIVER_VERSION 0x9A3E
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#define APM_MODE_16BIT 0x0001
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#endif // PC98
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VOID Int15 (PULONG, PULONG, PULONG, PULONG, PULONG);
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BOOLEAN
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HwGetApmSystemData(
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IN PAPM_REGISTRY_INFO ApmEntry
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)
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{
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ULONG RegEax, RegEbx, RegEcx, RegEdx, CyFlag;
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//
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// Perform APM installation check
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//
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#if defined(NEC_98)
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RegEax = PC98_APM_INSTALLATION_CHECK;
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#else // PC98
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RegEax = APM_INSTALLATION_CHECK;
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#endif // PC98
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RegEbx = APM_DEVICE_BIOS;
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Int15 (&RegEax, &RegEbx, &RegEcx, &RegEdx, &CyFlag);
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if (CyFlag ||
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(RegEbx & 0xff) != 'M' ||
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((RegEbx >> 8) & 0xff) != 'P') {
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return FALSE;
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}
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ApmEntry->ApmRevMajor = (UCHAR) (RegEax >> 8) & 0xff;
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ApmEntry->ApmRevMinor = (UCHAR) RegEax & 0xff;
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ApmEntry->ApmInstallFlags = (USHORT) RegEcx;
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//
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// Connect to 32 bit interface
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//
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#if defined(NEC_98)
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RegEax = PC98_APM_PROTECT_MODE_16bit_CONNECT;
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#else // PC98
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RegEax = APM_PROTECT_MODE_16bit_CONNECT;
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#endif // PC98
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RegEbx = APM_DEVICE_BIOS;
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Int15 (&RegEax, &RegEbx, &RegEcx, &RegEdx, &CyFlag);
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if (CyFlag) {
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return FALSE;
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}
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ApmEntry->Code16BitSegmentBase = (USHORT) RegEax;
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ApmEntry->Code16BitOffset = (USHORT) RegEbx;
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ApmEntry->Data16BitSegment = (USHORT) RegEcx;
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return TRUE;
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}
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#endif // _PNP_POWER_
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