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

   VxD = 0026h

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 0986)
Values for VPOWERD (VxD ID 0026h) service number:
 00h   get version

   Return: CF clear
       EAX = version (AH = major, AL = minor)
 01h   get APM BIOS version

   Return: CF clear
       EAX = APM BIOS version
 02h   get current power management level

   Return: CF clear
       EAX = power management level
 03h   enable/disable power management (see INT 15/AX=5308h)

   Return: EAX = error code (see #2352) or 00000000h if successful
 04h   set power state (see INT 15/AX=5307h)
   ???

   Return: EAX = error code (see #2352) or 00000000h if successful
 05h   set system power status

   Return: EAX = error code (see #2352) or 00000000h if successful
 06h   restore APM power-on defaults (see INT 15/AX=5309h)

   Return: EAX = error code (see #2352) or 00000000h if successful
 07h   get power status (see INT 15/AX=530Ah)

   Return: ???
 08h   get APM 1.1 power state (see INT 15/AX=530Ch)

   Return: ???
 09h   invoke OEM APM function
   ??? -> bufer containing parameters for INT 15/AX=5380h

   Return: EAX = error code (see #2352) or 00000000h if successful
       buffer updated if successful
 0Ah   register power handler
   ???

   Return: EAX = error code (see #2352) or 00000000h if successful
 0Bh   deregister power handler
   ???

   Return: EAX = error code (see #2352) or 00000000h if successful
 0Ch   Win32 get system power status
 0Dh   Win32 set system power status

See Also: #0985,#0987,INT 2F/AX=1684h/BX=0026h