Int 15 Fn 530B  - Advanced Power Management V1.0+ - Get Power Management   [p]

   AX = 530Bh

Return: CF clear if successful
       BX = event code (see #0405)
       CX = event information (APM v1.2) if BX=0003h or BX=0004h
       bit 0: PCMCIA socket was powered down in suspend state
   CF set on error
       AH = error code (03h,0Bh,80h) (see #0399)

Notes: although power management events are often asynchronous, notification
     will not be made until polled via this call to permit software to
     only receive event notification when it is prepared to process
     power management events; since these events are not very time-
     critical, it should be sufficient to poll once or twice per second
   the critical resume notification is made after the system resumes
     from an emergency suspension; normally, the system BIOS only notifies
     its partner that it wishes to suspend and relies on the partner to
     actually request the suspension, but no notification is made on an
     emergency suspension
   should not be called from within a hardware interrupt handler to avoid
     reentrance problems

See Also: AX=5307h,AX=5307h/CX=0001h"STAND-BY",AX=5307h/CX=0002h"SUSPEND"

(Table 0405)
Values for APM event code:
 0001h system stand-by request
 0002h system suspend request
 0003h normal resume system notification
 0004h critical resume system notification
 0005h battery low notification
---APM v1.1---
 0006h power status change notification
 0007h update time notification
 0008h critical system suspend notification
 0009h user system standby request notification
 000Ah user system suspend request notification
 000Bh system standby resume notification
---APM v1.2---
 000Ch capabilities change notification (see AX=5310h)