Trinity KT400 S2495
Appendix II: Post Error Code for BIOS
5-11
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POST (hex)
Description
4Eh:
1. Program MTRR of M1 CPU
2. Initialize L2 cache for P6 class CPU & program CPU with proper
cacheable range.
3. Initialize the APIC for P6 class CPU.
4. On MP platform, adjust the cacheable range to smaller one in case the
cacheable ranges between each CPU are not identical.
4Fh:
Reserved
50h:
Initialize USB Keyboard & Mouse.
51h:
Reserved
52h:
Test all memory (clear all extended memory to 0)
53h:
Clear password according to H/W jumper (Optional)
54h:
Reserved
55h:
Display number of processors (multi-processor platform)
56h:
Reserved
57h:
1. Display PnP logo
2. Early ISA PnP initialization
-Assign CSN to every ISA PnP device.
58h:
Reserved
59h:
Initialize the combined Trend Anti-Virus code.
5Ah:
Reserved
5Bh:
(Optional Feature)
Show message for entering AWDFLASH.EXE from FDD (optional)
5Ch:
Reserved
5Dh:
1. Initialize Init_Onboard_Super_IO
2. Initialize Init_Onbaord_AUDIO.
5Eh:
Reserved
5Fh:
Reserved
60h:
Okay to enter Setup utility; i.e. not until this POST stage can users enter
the CMOS setup utility.
61h:
Reserved
62h:
Reserved
