Toshiba PORTEGE M300 Maintenance Manual page 75

2 Troubleshooting Procedures
D port status
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
Initialization of PIT channel 2
Test of PIT channel 1
Test of PIT channel 2
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
CPU Initialization
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
PORTEGE M300 Maintenance Manual (960-504)
Table 2-4 Debug port error status (4/7)
Inspection items
2.4 System Board Troubleshooting
Details
Setting of timer interruption interval to
55ms
Setting of the sound generator
frequency to 664Hz
Check whether the refresh signal
works normally in 30 micro-s refresh
interval (Program halt when time out)
(Check whether the speaker gate
works normally.)
P6 microcode update
Set of permission/prohibition of
processor serial number ID
Geyserville support check
Setting of CPU clock "high"
(Default set if Bad battery, Bad
checksum (ROM, CMOS) detected.
2-25