Error Messages and Beep Codes
75
Table 39. Port 80h POST Codes
POST Code
Description of POST Operation
Host Processor
10
Power-on initialization of the host processor (Boot Strap Processor)
11
Host processor Cache initialization (including APs)
12
Starting Application processor initialization
13 SMM
initialization
Chipset
21
Initializing a chipset component
Memory
22
Reading SPD from memory DIMMs
23
Detecting presence of memory DIMMs
24
Programming timing parameters in the memory controller and the DIMMs
25 Configuring
memory
26
Optimizing memory settings
27
Initializing memory, such as ECC init
28 Testing
memory
PCI Bus
50
Enumerating PCI busses
51
Allocating resources to PCI bus
52
Hot Plug PCI controller initialization
53 – 57
Reserved for PCI Bus
USB
58
Resetting USB bus
59
Reserved for USB
ATA/ATAPI/SATA
5A
Resetting PATA/SATA bus and all devices
5B
Reserved for ATA
SMBus
5C Resetting
SMBUS
5D
Reserved for SMBUS
Local Console
70
Resetting the VGA controller
71
Disabling the VGA controller
72
Enabling the VGA controller
Remote Console
78
Resetting the console controller
79
Disabling the console controller
7A
Enabling the console controller
continued
