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/*++
Copyright (c) 1992 Microsoft Corporation
Module Name:
vxd.c
Abstract:
This module contains misc dpmi functions for risc.
Revision History:
Neil Sandlin (neilsa) Nov. 1, 95 - split off from "misc" source
--*/
#include "precomp.h"
#pragma hdrstop
#include "softpc.h"
LONG
VcdPmGetPortArray(
VOID
)
/*++
Routine Description:
Use the registry enteries in HKEY_LOCAL_MACHINE\\HARDWARE\\DEVICEMAP\\SERIALCOMM
to simulate the Virtual Comm Device API: VCD_PM_Get_Port_Array. See VCD.ASM
in the Win 3.1 DDK.
Arguments:
None
Return Value:
Port Array in LOWORD. Bit array of valid ports:
Bit Set -> Port valid
Bit clear -> Port invalid
Bit 0 -> COM1, Bit 1 -> COM2, Bit 2 -> COM3...
--*/
{
HKEY hSerialCommKey;
DWORD dwPortArray;
DWORD dwPortNum;
DWORD cbPortName;
DWORD cbPortValue;
CHAR szPortName[16];
CHAR szPortValue[16];
LONG iPort;
LONG iStatus;
dwPortArray = 0;
if (RegOpenKeyEx (HKEY_LOCAL_MACHINE,
"HARDWARE\\DEVICEMAP\\SERIALCOMM",
0, KEY_QUERY_VALUE | KEY_ENUMERATE_SUB_KEYS,
&hSerialCommKey) == ERROR_SUCCESS){
cbPortName = sizeof(szPortName);
cbPortValue = sizeof(szPortValue);
for (iPort = 0;
(iStatus = RegEnumValue(hSerialCommKey,
iPort, szPortName, &cbPortName,
NULL, NULL, szPortValue,
&cbPortValue)) != ERROR_NO_MORE_ITEMS;
iPort++)
{
if ((iStatus == ERROR_SUCCESS) && (cbPortValue > 3)) {
if (NT_SUCCESS(RtlCharToInteger(szPortValue+3,10,&dwPortNum))) {
dwPortArray |= (1 << (dwPortNum - 1));
}
}
cbPortName = sizeof(szPortName);
cbPortValue = sizeof(szPortValue);
}
// WOW only supports 9 ports. See WU32OPENCOM in WUCOMM.C.
dwPortArray &= 0x1FF;
RegCloseKey(hSerialCommKey);
}
return(dwPortArray);
}
// The following values taken from Win 3.1 DDK VCD.ASM:
#define VCD_PM_Get_Version 0
#define VCD_PM_Get_Port_Array 1
#define VCD_PM_Get_Port_Behavior 2
#define VCD_PM_Set_Port_Behavior 3
#define VCD_PM_Acquire_Port 4
#define VCD_PM_Free_Port 5
#define VCD_PM_Steal_Port 6
VOID
DpmiVcdPmSvcCall32(
VOID
)
/*++
Routine Description:
Dispatch VCD API requests to the correct API.
Arguments:
Client DX contains API function id.
Return Value:
Depends on API.
--*/
{
switch (getDX()) {
case VCD_PM_Get_Version:
setAX(0x30A);
break;
case VCD_PM_Get_Port_Array:
setAX((WORD)VcdPmGetPortArray());
break;
default :
ASSERT(0);
setCF(1);
}
}
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