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3 Getting Started
28
BIOS POST Checkpoint Codes
Bootblock Initialization Codes
The Bootblock initialization code sets up the chipset, memory
and other components before system memory is available. The
following table describes the type of checkpoints that may
occur during the bootblock initialization
.
Checkpoint Code
Description
Before D1
Early chipset initialization is done. Early super I/O
initialization is done including RTC and keyboard
controller.
NMI is enabled.
D1
Perform keyboard controller BAT test. Checks if
waking up from power management suspend state.
Save power-on CPUID value in scratch CMOS.
D0
Go to flat mode with 4 GB limit and GA20 enabled.
Verify the bootblock checksum.
D2
Disable CACHE before memory detection. Execute
full memory sizing module. Verify that flat mode is
enabled.
D3
If memory sizing module not executed, start memory
refresh and do memory sizing in Bootblock code. Do
additional chipset initialization. Re-enable CACHE.
Verify that flat mode is enabled
D4
Test base 512 KB memory. Adjust policies and cache
first 8 MB. Set stack.
D5
Bootblock code is copied from ROM to lower system
memory and control is given to it. BIOS now executes
out of RAM
D6
Both Key sequence and OEM specific method is
checked to determine if BIOS recovery is forced. Main
BIOS checksum is tested. If BIOS recovery is necessary,
control flows to checkpoint E0. See
Bootblock Recov-
ery Code Checkpoints
for more information.
BB!H421!.!FO/cppl!!Qbhf!39!!Xfeoftebz-!Gfcsvbsz!29-!3115!!5;67!QN
Содержание G310 Altos
Страница 1: ...Acer Altos G310 User s guide ...
Страница 10: ...Contents x ...
Страница 11: ...1 System information ...
Страница 18: ...1 System information 8 ...
Страница 19: ...2 System tour ...
Страница 32: ...2 System tour 22 ...
Страница 33: ...3 Getting Started ...
Страница 34: ...This chapter gives information on setting up and starting to use your system ...
Страница 46: ...3 Getting Started 36 ...
Страница 47: ...4 Configuring the system ...
Страница 90: ...4 Configuring the system 80 ...
Страница 91: ...5 BIOS setup ...
Страница 124: ...5 BIOS setup 114 ...
Страница 125: ...Appendix A Management software installation ...
Страница 126: ...This appendix shows you how to install the ASM and EasyBUILDTM software packages ...
Страница 130: ...Appendix A Management software installation 120 ...