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AX = 530Ah BX = device ID 0001h all devices power-managed by APM 80xxh specific battery unit number XXh (01h-FFh) (APM v1.2)
Return:
CF clear if successful BH = AC line status 00h off-line 01h on-line 02h on backup power (APM v1.1) FFh unknown other reserved BL = battery status (see #00476) CH = battery flag (APM v1.1+) (see #00477) CL = remaining battery life, percentage 00h-64h (0-100) percentage of full charge FFh unknown DX = remaining battery life, time (APM v1.1) (see #00478) ---if specific battery unit specified--- SI = number of battery units currently installed CF set on error AH = error code (09h,0Ah) (see #00473)
Notes: Should not be called from within a hardware interrupt handler to avoid reentrance problems. Supported in real mode (INT 15) and both 16-bit and 32-bit protected mode
(Table 00476) Values for APM v1.0+ battery status: 00h high 01h low 02h critical 03h charging FFh unknown other reserved
See Also: #00477 - #00478
Bitfields for APM v1.1+ battery flag: Bit(s) Description (Table 00477) 0 high 1 low 2 critical 3 charging 4 selected battery not present (APM v1.2) 5-6 reserved (0) 7 no system battery
Note: All bits set (FFh) if unknown
See Also: #00476 - #00478
Bitfields for APM v1.1+ remaining battery life: Bit(s) Description (Table 00478)
15 time units:
0=seconds, 1=minutes 14-0 battery life in minutes or seconds
Note: All bits set (FFFFh) if unknown
See Also: #00476 - #00477
Category: Power Management - Int 15h - A
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