Toshiba SATELLITE U200 manual Irtinismbaseend

2.4 System Board Troubleshooting 2 Troubleshooting Procedures

Table 2-4 Debug port (Boot mode) error status (5/10)

D port status	Inspection items	Details
F106H	IRT_INI_SMBASE_END
	Initialization of devices which	PIT test (Cold boot only) and initialization
	need initialization before PCI bus	Setting of test pattern to channel 0 of PIT#0
	initialization
		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) HLT, when the time is out
		Test of PIT channel 2
		(Check whether the speaker gate works normally)
		CPU clock measurement
		Check of parameter block A
		Permission of SMI except auto-off function
		Control of excess of rated input power
		Battery discharging current control (1CmA)
		AC adapter rated over current control
		Dividing procedures for time measuring by IRT
		Setting for clock generator
		CPU Initialization
		Judgment of CPU type
		Check of supporting Geyserville
		Make CPU clock High
		Setting of Graphics Aperture Size
F107H	IRT_CHK_INI_SYS1_END
	Saving memory configuration to
	buffer
	Reading of EC version
	Update of flash ROM type
	Judging of destination (Japan or
	other than Japan) based on DMI
	data
	CMOS default setting check	Sets default setting if bad battery or bad checksum
		(ROM, CMOS) is detected
	ACPI table initialization
	(for execution of option ROM)

PORTÉGÉ M500 Maintenance Manual (960-559) [CONFIDENTIAL] 2-27