翻译一下

1、The functionality of the VxD when processing this call is up to the VxD。
2、If the software interrupt interface provided by the VxD includes an installation check call (such as the VDS implementation provided by a Windows virtual device), there is no need for an explicit VxD installation check. Note that VDS stands for \"Virtual DMA Interface Specification,\" which is a software interface for virtual machines to access physical DMA (direct memory access). The specification is available in the Software/Data Library; just query for VDS.