Code(hex) Name
Description
45
Reinit serial port
Reinitialize Preboot agent serial port
46
Reserved
47
EISA Test
If EISA non-volatile memory checksum is good,
execute EISA initialization. If not, execute ISA tests
and clear EISA mode flag.
48
Reserved
49
Size Memory
Size base memory from 256K to 640K and extended
memory above 1MB.
4A
Reserved
4B
Reserved
4C
Reserved
4D
Reserved
4E
Init APIC
Initialize APIC and set MTRR
4F
Reserved
50
USB init Initialize
USB controller
51
Reserved
52
Memory Test
Test all memory of memory above 1MB using Virtual
8086 mode, page mode and clear the memory
53
Reserved
54
Reserved
55
CPU display
Detect CPU speed and display CPU vendor specific
version string and turn on all necessary CPU features
56
Reserved
57
PnP Init
Display PnP logo and PnP early init
58
Reserved
59
Setup Virus
Setup virus protect according to protect setup
5A
Reserved
5B
Awdflash Load
If required, will auto load Awdflash. exe in POST
5C
Reserved
5D
Onboard I/O Init
Initializing onboard superIO
5E
Reserved
5F
Reserved
60
Setup enable
Display setup message and enable setup functions
61
Reserved
62 Reserved
63
Initialize Mouse
Detect if mouse is present, initialize mouse, install
interrupt vectors.
64
Reserved
65
PS2 Mouse special
Special treatment to PS2 Mouse port
66
Reserved
67
ACPI init
ACPI sub-system initializing
68
Reserved
69
Init Cache
Initialize cache controller
6A
Reserved
6B
Setup
Enter setup check and auto configuration check up
6C
Reserved
