Acer 7520 manual Code Beeps

Code	Beeps	POST Routine Description
B9h		Prepare Boot
BAh		Initialize DMI parameters
BBh		Initialize PnP Option ROMs
BCh		Clear parity checkers
BDh		Display MultiBoot menu
BEh		Clear screen (optional)
BFh		Check virus and backup reminders
C0h		Try to boot with INT 19
C1h		Initialize POST Error Manager (PEM)
C2h		Initialize error logging
C3h		Initialize error display function
C4h		Initialize system error handler
C5h		PnPnd dual CMOS (optional)
C6h		Initialize notebook docking (optional)
C7h		Initialize notebook docking late
C8h		Force check (optional)
C9h		Extended checksum (optional)
D2h		Unknown interrupt

	Code		Beeps
E0h				Initialize the chipset
E1h				Initialize the bridge
E2h				Initialize the CPU
E3h				Initialize the system timer
E4h				Initialize system I/O
E5h				Check force recovery boot
E6h				Checksum BIOS ROM
E7h				Go to BIOS
E8h				Set Huge Segment
E9h				Initialize Multi Processor
EAh				Initialize OEM special code
EBh				Initialize PIC and DMA
ECh				Initialize Memory type
EDh				Initialize Memory size
EEh				Shadow Boot Block
EFh				System memory test
F0h				Initialize interrupt vectors
F1h				Initialize Run Time Clock
F2h				Initialize video
F3h				Initialize System Management Mode
F4h		1		Output one beep before boot

Chapter 4 115