Int 20  P - Microsoft Windows - Vtd - Vxd Services                         [W]

   VxD = 0005h

Note:  the desired VxD and service number are identified by the data
     immediately following the INT 20 instruction, as in:
       INT 20h
       DW  service number
       DW  VxD identifier

See Also: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#0961,#1032

(Table 0965)
Values for VTD (VxD ID 0005h) service number:
 0000h get version
 0001h update system clock
 0002h get interrupt period
 0003h begin minimum interrupt period
 0004h end minimum interrupt period
 0005h disable trapping
 0006h enable trapping
 0007h get real time

   Return: EDX:EAX = time in 840ns units since Windows was started
 0008h "VTD_Get_Date_And_Time"
 0009h "VTD_Adjust_VM_Count"
 000Ah "VTD_Delay"

See Also: #2333 at INT 2F/AX=1684h/BX=0005h