VP_STATUS VgaValidatorUcharEntry( ULONG Context, ULONG Port, UCHAR AccessMode, PUCHAR Data ); Routine Description: Entry point into the validator for byte I/O operations. The entry point will be called whenever a byte operation was performed by a DOS application on one of the specified Video ports. The kernel emulator will forward these requests. Arguments: Context - Context value that is passed to each call made to the validator function. This is the value the miniport driver specified in the MiniportConfigInfo->EmulatorAccessEntriesContext. Port - Port on which the operation is to be performed. AccessMode - Determines if it is a read or write operation. Data - Pointer to a variable containing the data to be written or a variable into which the read data should be stored. Return Value: NO_ERROR.