2 Troubleshooting Procedures 2.4 System Board Troubleshooting
PORTEGE M300 Maintenance Manual (960-504) 2-25
Table 2-4 Debug port error status (4/7)
D port status Inspection items Details
F104h
SMRAM initialization
WakeUp factor check
SMRAM base rewriting and storing CPU
state map for BIOS
Permission of SMI based on ASMI
F106h
Initialization of devices which need
initialization before PCI bus initialization.
PIT test (Only when Cold booting)
and initialization
Setting of test pattern to channel 0 of
PIT#0
Check whether the set test pattern can be
read
Initialization of PIT channel 0 Setting of timer interruption interval to
55ms
Initialization of PIT channel 2 Setting of the sound generator
frequency to 664Hz
Test of PIT channel 1 Check whether the refresh signal
works normally in 30 micro-s refresh
interval (Program halt when time out)
Test of PIT channel 2 (Check whether the speaker gate
works normally.)
CPU clock measurement
Permission of SMI except auto-off function
Battery discharging current control
Dividing procedures for time measuring by
IRT
Setting for clock generator
P6 microcode update
Set of permission/prohibition of
processor serial number ID
CPU Initialization
Geyserville support check
Setting of CPU clock “high"
Graphics Aperture Size setting
F107h
Saving memory configuration in each row
to buffer
Reading of EC version
Update of flash ROM type
Judging of destination (Japan or except
Japan) based on DMI data
CMOS default setting check (Default set if Bad battery, Bad
checksum (ROM, CMOS) detected.
