Biostar B450MX, Manual

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24 | Chapter 4: Useful help
4.2 AMI BIOS Beep Code
Boot Block Beep Codes
Number of Beeps Description
Continuing Memory sizing error or Memory module not found
POST BIOS Beep Codes
Number of Beeps Description
1 Success booting.
8 Display memory error (system video adapter)
4.3 AMI BIOS post code
Code Description
10 PEI Core is started
11 Pre-memory CPU initialization is started
15 Pre-memory North Bridge initialization is started
19 Pre-memory South Bridge initialization is started
2B Memory initialization. Serial Presence Detect (SPD) data reading
2C Memory initialization. Memory presence detection
2D Memory initialization. Programming memory timing information
2E Memory initialization. Configuring memory
2F Memory initialization (other).
31 Memory Installed
32 CPU post-memory initialization is started
33 CPU post-memory initialization. Cache initialization
34 CPU post-memory initialization. Application Processor(s) (AP) initialization
35 CPU post-memory initialization. Boot Strap Processor (BSP) selection
36 CPU post-memory initialization. System Management Mode (SMM) initialization
37 Post-Memory North Bridge initialization is started
3B Post-Memory North Bridge initialization (North Bridge module specific)
4F DXE IPL is started
60 DXE Core is started
F0 Recovery condition triggered by firmware (Auto recovery)
F1 Recovery condition triggered by user (Forced recovery)
F2 Recovery process started
F3 Recovery firmware image is found
F4 Recovery firmware image is loaded
E0 S3 Resume is stared (S3 Resume PPI is called by the DXE IPL)
E1 S3 Boot Script execution
E2 Video repost
E3 OS S3 wake vector call
60 DXE Core is started
61 NVRAM initialization
62 Installation of the South Bridge Runtime Services
63 CPU DXE initialization is started
68 PCI host bridge initialization
69 North Bridge DXE initialization is started
6A North Bridge DXE SMM initialization is started