Acer ASPIRE 4230 Service Manual page 151

POST Code
0x8B Setup interrupt vector and present bit in Equipment
byte.
0x95 1. Check CMOS for CD-ROM drive present 2.
Activate the drive by checking for media present 3.
Check sector 11h (17) for Boot Record Volume
Descriptor 4. Check the boot catalog for validity 5.
Pick a boot entry 6. Create a Specification Packet
0x92 Jump to UserPatch2.
0xB6 If password on boot is enabled, a call is made to
Setup to check password. If the user does not enter
a valid password, Setup does not return.
0x98 Search for option ROMs. ROM scan the area from
C800h for a length of BCP_ROM_Scan_Size (or to
E000h by default) on every 2K boundary, looking for
add on cards that need initialization.
0x93 Build the MPTABLE for multi-processor boards
0xD9 IPMI late init
0x9C Set up Power Management. Initiate power -
management state machine.
0xC7 Late note dock init
0x9E Enable hardware interrupts
0xA0 Setup time tick for current date/time
0xA2 Setup Numlock indicator. Display a message if key
switch is locked.
0xA4 Initialize typematic rate
0xDB StrongROM Test
0xE2 OEM security key test
0xC2 Write PEM errors.
0xBA Initialize the SMBIOS header and sub-structures.
0xC3 Display PEM errors.
0xA8 Overwrite the "Press F2 for Setup" prompt with
spaces, erasing it from the screen.
0xAA Scan the key buffer to see if the F2 key was struck
after keyboard interrupts were enabled. If an F2
keystroke is found, set a flag.
0xE1 Start Periodic Timer (TC Subscribe)
0xAC Check if "Enter SETUP" is pressed.
0x8F Count the number of ATA drives in the system and
update the number in bdaFdiskcount.
0x91 Configure the local bus IDE timing register based on
the drives attached to it.
0x9F Check the total number of Fast Disks (ATA and
SCSI) and update the bdaFdiskCount.
0xD7 Check if FirstWare HPA exists
0xAE Clear ConfigFailedBit and InPostBit in CMOS.
0xB0 Check for errors and decide if needs to run Setup.
0xB2 Change status bits in CMOS and/or the TrustedCore
data area to reflect the fact that POST is complete.
Chapter 4
Function Phase Component
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
LBT Core
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