cExpress-EL User’s Guide
PICMG COM.0 R3.0
Page 61
Copyright © 2021 ADLINK Technology, Inc.
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.
