Chapter 4
161
Post Codes
These tables describe the POST codes and descriptions during the POST.
Chipset POST Codes
The following table details the chipset POST codes and functions used in the POST.
Sec:
NO_EVICTION_MODE_DEBUG EQU 1 (CommonPlatform\sec\Ia32\SecCore.inc)
Memory:
DEBUG_BIOS equ 1 (Chipset\Alviso\MemoryInitAsm\IA32\IMEMORY.INC)
Code
Description
0xC2
MTRR setup
0xC3
Enable cache
0xC4
Establish cache tags
0xC5
Enter NEM, Place the BSP in No Fill mode, set CR0.CD = 1, CR0.NW = 0.
0xCF
Cache Init Finished
Code
Description
0xA0
First memory check point
0x01
Enable MCHBAR
0x02
Check for DRAM initialization interrupt and reset fail
0x03
Verify all DIMMs are DDR or DDR2 and unbuffered
0x04
Detect an improper warm reset and handle
0x05
Detect if ECC SO-DIMMs are present in the system
0x06
Verify all DIMMs are single or double sided and not asymmetric
0x07
Verify all DIMMs are x8 or x16 width
0x08
Find a common CAS latency between the DIMMS and the MCH
0x09
Determine the memory frequency and CAS latency to program
0x10
Determine the smallest common TRAS for all DIMMs
0x11
Determine the smallest common TRP for all DIMMs
0x12
Determine the smallest common TRCD for all DIMMs
0x13
Determine the smallest refresh period for all DIMMs
0x14
Verify burst length of 8 is supported by all DIMMs
0x15
Determine the smallest tWR supported by all DIMMs
0x16
Determine DIMM size parameters
0x17
Program the correct system memory frequency
0x18
Determine and set the mode of operation for the memory channels
0x19
Program clock crossing registers
0x20
Disable Fast Dispatch
0x21
Program the DRAM Row Attributes and DRAM Row Boundary registers
0x22
Program the DRAM Bank Architecture register
0x23
Program the DRAM Timing & and DRAM Control registers
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Summary of Contents for Bell EasyNote LJ75
Page 6: ...VI All manuals and user guides at all guides com a l l g u i d e s c o m ...
Page 15: ...Chapter 1 5 System Block Diagram All manuals and user guides at all guides com ...
Page 58: ...48 Chapter 2 All manuals and user guides at all guides com ...
Page 148: ...138 Chapter 3 All manuals and user guides at all guides com ...
Page 178: ...168 Chapter 4 All manuals and user guides at all guides com ...
Page 186: ...176 Chapter 5 All manuals and user guides at all guides com a l l g u i d e s c o m ...
Page 199: ...Chapter 6 189 All manuals and user guides at all guides com ...
Page 216: ...206 Appendix B All manuals and user guides at all guides com a l l g u i d e s c o m ...
Page 218: ...208 Appendix C All manuals and user guides at all guides com ...
Page 222: ...212 All manuals and user guides at all guides com ...