Annex: Post-Codes
Beckhoff New Automation Technology
CB4055
page 95
I Annex: Post-Codes
During boot, the BIOS generates a sequence of status codes (so-called "POST codes"), which can be
viewed using a special output device (POST code card). The meaning of these codes is described in the
document "Aptio™ 4.x Status Codes" by American Megatrends®, which can be downloaded from their
website http://www.ami.com. The following additional OEM POST codes are generated:
Code
Description
87h
BIOS-API started
88h
PCA9535 started
89h
PWRCTRL-Firmware started