Status Code Ranges - ADLINK Technology arm AMPERE COM-HPC-ALT User Manual

COM-HPC-ALT User's Guide
Viewing Checkpoints
Checkpoints generated by Aptio firmware can be viewed using a PCI checkpoint card, also referred to as a "POST Card" or "POST Diagnostic Card".
These PCI add-in cards show the value of I/O port 80h on a LED display. Checkpoint cards are available through a variety of computer mail-order
outlets.
Newer systems feature support for AMI Debug Rx, a USB connected alternative to the PCI POST Card. AMI Debug Rx is a low-cost debug tool built
around the debug port feature common to today's USB 2.0 EHCI controllers. AMI Debug Rx is designed as replacement for the PCI POST Checkpoint
Card as newer systems omit PCI expansion slots. Along with checkpoints, AMI Debug Rx has several features specifically designed for BIOS developers.

6.1 Status Code Ranges

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)
Note: Table above is subject to future updates.
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