
TABLE H-44 BIOS POST Codes
POST Code | Description |
|
|
48Check video configuration against CMOS
49Initialize PCI bus and devices
4A | Initialize all video adapters in system |
4B | QuietBoot start (optional) |
4C | Shadow video BIOS ROM |
4E | Display BIOS copyright notice |
4F | Initialize MultiBoot |
50Display CPU type and speed
51Initialize EISA board
52Test keyboard
54Set key click if enabled
55Enable USB devices
58Test for unexpected interrupts
59Initialize POST display service
5A | Display prompt “Press F2 to enter SETUP” |
5B | Disable CPU cache |
5C | Test RAM between 512KB and 640KB |
60Test extended memory
62Test extended memory address lines
64Jump to UserPatch1
66Configure advanced cache registers
67Initialize Multi Processor APIC
68Enable external and CPU caches
69Setup system management mode (SMM) area
6A | Display external L2 cache size |
6B | Load custom defaults (optional) |
6C | Display shadow area message |
6E | Display possible high address for UMB recovery |
70Display error messages
72Check for configuration errors
Appendix H Service Processor Commands 189