Bios Post Codes - Sun Microsystems Sun Fire V20z User Manual

B
A P P E N D I X

BIOS POST Codes

Typically, the BIOS displays warning or error messages on the video display in the
event of hardware or configuration errors. However, in some cases the error may be
so severe that the BIOS halts immediately or the BIOS might be unable to initialize
video. In these cases, it can be useful to determine the last Power On Self-Test
(POST) task that the BIOS was executing. This is indicated by the value written to
port 80.
For information about retrieving the last port 80 post code using the
sp get port80 command, refer to the Sun Fire V20z and Sun Fire V40z Servers,
Server Management Guide, for details.
You can also retrieve the last 10 port 80 post codes using the operator panel. Refer to
the Sun Fire V20z and Sun Fire V40z Servers, Server Management Guide, for more
details about using the operator-panel menus.
TABLE B-1
TABLE B-1
Post Code
02
03
04
06
07
08
09
0A
0B
0C
lists the POST codes for the Sun Fire V20z and Sun Fire V40z servers BIOS.
BIOS POST Codes
Description
Verify real mode
Disable non-maskable interrupt (NMI)
Get CPU type
Initialize system hardware
Disable shadow and execute code from the ROM
Initialize chipset with initial POST values
Set IN POST flag
Initialize CPU registers
Enable CPU cache
Initialize caches to initial POST values
B-1