Sun Microsystems Sun Fire V20z - Manual (Page 91)

B-1
A P P E N D I X
B
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 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 Server Management Guide, 817-5249-xx ,
for details.
You can also retrieve the last 10 port 80 post codes using the operator panel. Refer to
the Sun Fire V20z Server Management Guide,
817-5249-xx , for more details about using
the operator panel menus.
TABLE B-1 lists the POST codes for the Sun Fire V20z BIOS.
TABLE B-1 BIOS POST Codes
Post Code Description
02 Verify real mode
03 Disable non-maskable interrupt (NMI)
04 Get CPU type
06 Initialize system hardware
07 Disable shadow and execute code from the ROM
08 Initialize chipset with initial POST values
09 Set IN POST flag
0A Initialize CPU registers
0B Enable CPU cache
0C Initialize caches to initial POST values