Toshiba Portege M200 Maintenance Manual page 63

2.4 System Board Troubleshooting
D port
Details
status
Initializing SMRAM
F104h
Checking factor of WakeUp
Rewriting SMRAM base and storing CPU state
map for BIOS
Enabling SMI by ASMI
Initializing devices which need initialization before
F106h
initializing PCI bus
Testing (only on COLD booting) and Initializing PIT
Setting test pattern to channel 0 of PIT#0
Checking whether the test pattern can be read
Initializing PIT channel 0 (Interval of timer interrupt
-> 55ms)
Initializing PIT channel 2 (frequency for sound
generator -> 664Hz)
Testing PIT channel 1(checks whether the refresh
signal operates correctly in refresh interval of 30
micro seconds)
Testing PIT channel 2 ( checks whether the
speaker gate operates correctly)
Measuring CPU clock
Enabling SMIs except auto-off function
Control of battery discharging current
Performing timeshared process for time
measurement of IRT
Initializing CPU
Updating P6 micro-code
Enabling or disabling function of processor
serial number ID
Checking whether Geyserville is supported
Switching CPU clock speed to high
Setting Graphics Aperture Size
Portege M200 Maintenance Manual (960-457)
Table 2-3 D port status (4/7)
2 Troubleshooting
Remarks
HALT when time out occurs.
2-25