Int 15 Fn 530D  - Advanced Power Management V1.1+ - En/disable Device Pow  [p]

   AX = 530Dh
   BX = device ID (see #0400)
   CX = function
       0000h disable power management
       0001h enable power management

Return: CF clear if successful
   CF set on error
       AH = error code (01h,03h,09h,0Ah,0Bh) (see #0399)
Desc:  specify whether automatic power management should be active for a
     given device

See Also: AX=5308h,AX=530Fh