2-16
Chapter 2
(12). POST Code Display
This is an LED device to display the “
POST
” Code, the acronym of
P
ower
O
n
S
elf
T
est. The computer
will execute the POST action whenever you power on the computer. The POST process is controlled by
the BIOS. It is used to detect the status of the computer’s main components and peripherals. Each POST
Code corresponds to different checkpoints that are also defined by the BIOS in advance. For example,
“memory presence test” is an important checkpoint and its POST Code is “C1”. When the BIOS execute
any POST item, it will write the corresponding POST Code into the address 80h. If the POST passes, the
BIOS will process the next POST item and write the next POST Code into the address 80h. If the POST
fails, we can check the POST Code in address 80h to find out where the problem lies.
This LED device also displays the “POST” Code of AC2003, an “uGuru” chipset developed exclusively
by ABIT computer.
NOTE:
The decimal point lights up when executing the AC2003 POST action.
See Appendix for both AWARD and AC2003 POST Code definition.
AA8XE
Summary of Contents for AA8XE
Page 1: ...AA8XE Intel Pentium 4 System Board Socket 775 User s Manual 4200 0436 01 Rev 1 00 ...
Page 7: ...Introduction 1 3 1 2 Layout Diagram User s Manual ...
Page 8: ...1 4 Chapter 1 1 4 Chapter 1 AA8XE AA8XE ...
Page 28: ...2 20 Chapter 2 2 20 Chapter 2 AA8XE AA8XE ...
Page 56: ...A 2 Appendix A A 2 Appendix A AA8XE AA8XE ...
Page 60: ...C 2 Appendix C C 2 Appendix C AA8XE AA8XE ...
Page 62: ...D 2 Appendix D AA8XE ...
Page 64: ...E 2 Appendix E E 2 Appendix E AA8XE AA8XE ...
Page 66: ...F 2 Appendix F AA8XE ...
Page 72: ...G 6 Appendix G AA8XE ...
