BOOLEAN FASTCALL VBEMapVideoMemory	(	PVBE_DEVICE_EXTENSION	DeviceExtension,
		PVIDEO_MEMORY	RequestedAddress,
		PVIDEO_MEMORY_INFORMATION	MapInformation,
		PSTATUS_BLOCK	StatusBlock
	)

Definition at line 752 of file vbemp.c.

Referenced by VBEStartIO().

{
   PHYSICAL_ADDRESS FrameBuffer;
   ULONG inIoSpace = VIDEO_MEMORY_SPACE_MEMORY;

   StatusBlock->Information = sizeof(VIDEO_MEMORY_INFORMATION);

   if (DeviceExtension->ModeInfo[DeviceExtension->CurrentMode].ModeAttributes &
       VBE_MODEATTR_LINEAR)
   {
      FrameBuffer.QuadPart =
         DeviceExtension->ModeInfo[DeviceExtension->CurrentMode].PhysBasePtr;
      MapInformation->VideoRamBase = RequestedAddress->RequestedVirtualAddress;
      if (DeviceExtension->VbeInfo.Version < 0x300)
      {
         MapInformation->VideoRamLength =
            DeviceExtension->ModeInfo[DeviceExtension->CurrentMode].BytesPerScanLine *
            DeviceExtension->ModeInfo[DeviceExtension->CurrentMode].YResolution;
      }
      else
      {
         MapInformation->VideoRamLength =
            DeviceExtension->ModeInfo[DeviceExtension->CurrentMode].LinBytesPerScanLine *
            DeviceExtension->ModeInfo[DeviceExtension->CurrentMode].YResolution;
      }
   }
#ifdef VBE12_SUPPORT
   else
   {
      FrameBuffer.QuadPart = 0xA0000;
      MapInformation->VideoRamBase = RequestedAddress->RequestedVirtualAddress;
      MapInformation->VideoRamLength = 0x10000;
   }
#endif

   VideoPortMapMemory(DeviceExtension, FrameBuffer,
      &MapInformation->VideoRamLength, &inIoSpace,
      &MapInformation->VideoRamBase);

   MapInformation->FrameBufferBase = MapInformation->VideoRamBase;
   MapInformation->FrameBufferLength = MapInformation->VideoRamLength;

   return TRUE;
}

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