This function retrieves the driver version.

 	Function:	IO$_LD_CONTROL

 	P1 = address of a longword to get the driver version format
 	     (Currently 1)
 	P2 = address of a quadword to receive the driver's linktime
 	P6 = Subfunction: LDIO$K_GET_VERSION

 	IOSB word 0 = status

 	Errors returned:

 	SS$_ACCVIO	Buffer can not be written
 	SS$_NORMAL	Successful completion
 	SS$_SYNCH	Successful completion (MON version)