Acer Aspire S3 Ms2346 Service Guide

Troubleshooting4-21
2FhEnable cache before system BIOS shadow
30h 1-4-1-1 RAM failure on data bits  xxxx of high byte of memory bus
32h Test CPU bus-clock frequency
33h Initialize Phoenix Dispatch Manager
36h Warm start shut down
38h Shadow system BIOS ROM
3Ah Autosize cache
3Ch Advanced configuration of chipset registers
3Dh Load alternate registers with CMOS values
42h Initialize interrupt vectors
45h POST device initialization
46h 2-1-2-3 Check ROM copyright notice
48h Check video configuration...

4-22Troubleshooting
69hSetup System Management Mode (SMM) area
6Ah Display external L2 cache size
6Bh Load custom defaults (optional)
6Ch Display shadow-area message
6Eh Display possible high address for UMB recovery
70h Display error messages
72h Check for configuration errors
76h Check for keyboard errors
7Ch Set up hardware interrupt vectors
7Eh Initialize coprocessor if present
80h Disable onboard Super I/O ports and IRQs
81h Late POST device initialization
82h Detect and install external RS232...

Troubleshooting4-23
99hCheck for SMART drive (optional)
9Ah Shadow option ROMs
9Ch Set up Power Management
9Dh Initialize security engine (optional)
9Eh Enable hardware interrupts
9Fh Determine number of ATA and SCSI drives
A0h Set time of day
A2h Check key lock
A4h Initialize Typematic rate
A8h Erase F2 prompt
AAh Scan for F2 key stroke
ACh Enter SETUP
AEh Clear Boot flag
B0h Check for errors
B2h POST done- prepare to boot operating system
B4h 1 One short beep before boot
B5h Terminate QuietBoot...

4-24Troubleshooting
C8hForce check (optional)
C9h Extended checksum (optional)
D2h Unknown interrupt
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...

Troubleshooting4-25
POST Codes0
There are two types of POST codes: Progress Codes and Error Codes. Progress Codes are 
designed to show the execution point while b ooting or executing services. Error Codes are 
designed to halt on exceptional (fatal) error conditions.
Component Codes0
The Component Code is an unsigned integer value  that is assigned by the build process. The 
following tables describe the various ranges of component codes: 
The Component Code is assigned to an individual component (or...

4-26Troubleshooting
POSTCODE_CC_HII_FORMS_BROWSER (0x3a) 
POSTCODE_CC_BOOT_MENU (0x3b) 
POSTCODE_CC_USER_MANAGER (0x3c) 
POSTCODE_CC_TIMER (0x3d) 
POSTCODE_CC_PCI_BUS (0x3e) 
POSTCODE_CC_ISA_BUS (0x3f) 
POSTCODE_CC_IDE_BUS (0x40) 
POSTCODE_CC_AHCI_BUS (0x41) 
POSTCODE_CC_SCSI_BUS (0x42) 
POSTCODE_CC_U SB_BUS (0x43) 
POSTCODE_CC_FLOPPY (0x44) 
POSTCODE_CC_SERIAL_PORT (0x45) 
POSTCODE_CC_PS2_MOUSE (0x46) 
POSTCODE_CC_PS2_KEYBOARD (0x47) 
POSTCODE_CC_EHCI (0x48) 
POSTCODE_CC_XHCI (0x49) 
POSTCODE_CC_UHCI...

Troubleshooting4-27
0xa0-0xaf These values are reserved  for SecureCore Tiano™ platform 
components. 
POSTCODE_CC_PLATFORM_STAGE0  (0xa0) - Early PEI Platform 
Initialization. 
POSTCODE_CC_PLATFORM_STAGE 1 (0xa1) -PEI Platform 
Initialization. 
POSTCODE_CC_PLATFORM_DXE (0xa1) - DXE Platform 
Initialization. 
POSTCODE_CC_PLATFORM_SMM (0xa1) - SMM Platform 
Initialization. 
POSTCODE_CC_PLATFORM_FLASH  (0xa2) - Flash Platform 
Initialization. 
POSTCODE_CC_PLATFORM_CSM  (0xa3) - CSM Platform 
Initialization....

4-28Troubleshooting
0xe0-0xff These are not components, but rather represent Architectural Progress 
Codes or Error Codes detailing milest ones in the system boot progress. 
The corresponding Progress Code value is always set to zero. 
POSTCODE_PC_SEC_ENTRY (0xe0) - Reset vector. 
POSTCODE_PC_SEC_EXIT (0xe1)  - Leaving SEC/Going to PEI. 
POSTCODE_PC_PEI_ENTRY (0xe2)  - Entering PEI Dispatch. 
POSTCODE_PC_PEI_EXIT (0xe3)  - Exiting PEI Dispatch. 
POSTCODE_PC_IPL_DXE (0xe4) - En tering DXE IPLs normal boot...

Troubleshooting4-29
Progress Codes0
This section describes the progress code values.
Table 4-5. Progress Codes
Range Description
0x00-0x1f Standard progress Codes.  All other values are reserved. 
POSTCODE_PC_COMP_PEI_BEGIN (0x01) - The component was 
loaded and the PEI entry point called.
POSTCODE_PC_COMP_PEI_END (0x02) - The component returned 
from the PEI entry point. 
POSTCODE_PC_COMP_DXE_BEGIN (0x03) - The component was 
loaded and the DXE/UEFI entry point called. 
POSTCODE_PC_COMP_DXE_END (0x04) -...

4-30Troubleshooting