User manual

Wiwynn™ SV320 Technical User Manual 15
Checkpoints
A status code is a data value used to indicate progress during the boot phase.
A subset of these status codes, known commonly as checkpoints, indicate
common phases of the BIOS boot process.
Checkpoints are very useful in aiding software developers or technicians in
debugging problems that occur during the pre-boot process.
Checkpoint Ranges
Status Code Range
Description
0x01 – 0x0B
SEC execution
0x0C – 0x0F
SEC errors
0x10 – 0x2F
PEI execution up to and including memory
detection
0x30 – 0x4F
PEI execution after memory detection
0x50 – 0x5F
PEI errors
0x60 – 0x8F
DXE execution up to BDS
0x90 – 0xCF
BDS execution
0xD0 – 0xDF
DXE errors
0xE0 – 0xE8
S3 Resume (PEI)
0xE9 – 0xEF
S3 Resume errors (PEI)
0xF0 – 0xF8
Recovery (PEI)
0xF9 – 0xFF
Recovery errors (PEI)
Standard Checkpoints
SEC Phase
Status Code
Description
0x00
Not used