Added support for DPMI RawModeSwitch.

include/callback.h

@@ -32,6 +32,7 @@ typedef struct {
     void (WINAPI *CallRMProc)( CONTEXT86 *context, int iret );
     void (WINAPI *AllocRMCB)( CONTEXT86 *context );
     void (WINAPI *FreeRMCB)( CONTEXT86 *context );
+    void (WINAPI *RawModeSwitch)( CONTEXT86 *context );
 
     /* I/O functions */
     void (WINAPI *SetTimer)( unsigned ticks );

msdos/dpmi.c

@@ -65,6 +65,7 @@ BOOL DPMI_LoadDosSystem(void)
     GET_ADDR(CallRMProc);
     GET_ADDR(AllocRMCB);
     GET_ADDR(FreeRMCB);
+    GET_ADDR(RawModeSwitch);
     GET_ADDR(SetTimer);
     GET_ADDR(GetTimer);
     GET_ADDR(inport);
@@ -190,6 +191,15 @@ static void FreeRMCB( CONTEXT86 *context )
     else Dosvm.FreeRMCB( context );
 }
 
+static void RawModeSwitch( CONTEXT86 *context )
+{
+    if (!Dosvm.RawModeSwitch)
+    {
+      ERR("could not setup real-mode calls\n");
+      return;
+    }
+    else Dosvm.RawModeSwitch( context );
+}
 
 /**********************************************************************
  *	    INT_Int31Handler (WPROCS.149)
@@ -207,6 +217,11 @@ void WINAPI INT_Int31Handler( CONTEXT86 *context )
     DWORD dw;
     BYTE *ptr;
 
+    if (context->SegCs == DOSMEM_dpmi_sel) { 
+        RawModeSwitch( context );
+        return;
+    }
+
     RESET_CFLAG(context);
     switch(AX_reg(context))
     {

msdos/int2f.c

@@ -356,9 +356,6 @@ static void do_int2f_16( CONTEXT86 *context )
         break;
 
     case 0x87: /* DPMI installation check */
-#if 1   /* DPMI still breaks pkunzip */
-        if (ISV86(context)) break; /* so bail out for now if in v86 mode */
-#endif
         {
 	    SYSTEM_INFO si;
 	    GetSystemInfo(&si);