Acer Altos R720 Series User Manual
Page 160
5 Troubleshooting
150
0x13h
OFF
OFF
G
A
SMM initialization
Chipset
0x21h
OFF
OFF
R
G
Initializing a chipset component
Memory
0x22h
OFF
OFF
A
OFF
Reading configuration data from
memory (SPD on DIMM)
0x23h
OFF
OFF
A
G
Detecting presence of memory
0x24h
OFF
G
R
OFF
Programming timing parameters in
the memory controller
0x25h
OFF
G
R
G
Configuring memory parameters in
the memory controller
0x26h
OFF
G
A
OFF
Optimizing memory controller
settings
0x27h
OFF
G
A
G
Initializing memory, such as ECC init
0x28h
G
OFF
R
OFF
Testing memory
PCI Bus
0x50h
OFF
R
OFF
R
Enumerating PCI busses
0x51h
OFF
R
OFF
A
Allocating resources to PCI busses
0x52h
OFF
R
G
R
Hot Plug PCI controller
initialization
0x53h
OFF
R
G
A
Reserved for PCI bus
0x54h
OFF
A
OFF
R
Reserved for PCI bus
0x55h
OFF
A
OFF
A
Reserved for PCI bus
0x56h
OFF
A
G
R
Reserved for PCI bus
0x57h
OFF
A
G
A
Reserved for PCI bus
USB
0x58h
G
R
OFF
R
Resetting USB bus
0x59h
G
R
OFF
A
Reserved for USB devices
Checkpoint
code
Diagnostic LED Decoder
Description
G=Green, R=Red, A=Amber
MSB
LSB