)
Values for PAGEFILE (VxD ID 0021h) service number:
 00h	get version
 01h	init file
 02h	clean up
 03h	grow file
 04h	read or write
 05h	cancel
 06h	test I/O valid
 07h	"Get_Size_Info"
 08h	"Set_Async_Manager"
 09h	"Call_Async_Manager"
SeeAlso: #01288,#02661 at INT 2F/AX=1684h/BX=0021h