Acer ASPIRE 4252 Service Manual page 139

Code
85h Initial
86h
87h
88h
89h
8Ah
8Bh
8Ch
Code
8Fh
90h Initial
91h Initial
92h Jump
93h
95h
96h
97h
98h 1-2
99h
9Ah Shad
9Ch
9Dh
9Eh
9Fh
A0h
A2h
A4h
A8h Erase
AAh
ACh Enter
AEh
B0h
B2h
B4h 1
B5h
B6h
B9h Prep
BAh
BBh
BCh
BDh
Chapter 4
Beeps
ize PC-compatible PnP ISA devices
Re-initialize onboard I/O ports.
Configure Motheboard Configurable Devices (optional)
Initialize BIOS Data Area
Enable Non-Maskable Interrupts (NMIs)
Initialize Extended BIOS Data Area
Test and initialize PS/2 mouse
Initialize floppy controller
Beeps
Determine number of ATA drives (optional)
ize hard-disk controllers
ize local-bus hard-disk controllers
to UserPatch2
Build MPTABLE for multi-processor boards
Install CD ROM for boot
Clear huge ES segment register
Fixup Multi Processor table
Search for option ROMs. One long, two short beeps on checksum
failure
Check for SMART Drive (optional)
ow option ROMs
Set up Power Management
Initialize security engine (optional)
Enable hardware interrupts
Determine number of ATA and SCSI drives
Set time of day
Check key lock
Initialize Typematic rate
F2 prompt
Scan for F2 key stroke
SETUP
Clear Boot flag
Check for errors
POST done - prepare to boot operating system
One short beep before boot
Terminate QuietBoot (optional)
Check password (optional)
are Boot
Initialize DMI parameters
Initialize PnP Option ROMs
Clear parity checkers
Display MultiBoot menu
POST Routine Description
POST Routine Description
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