Toshiba R100 manual F009h

2 Troubleshooting			2.4 System board Troubleshooting
		Table 2-3 D port status (2/6)
	D port status	Inspection items	details
			Key inputting
		Executing CHGBIOSA	Loading CHGBIOSA.EXE and CHGFIRMA.EXE
			Resetting FDC
			Setting parameter for 2HD and transmission rate
			Reading the first sector
			Setting parameter for 2DD and transmission rate
	F009h		Searching CHGBIOSA.EXE in the root director
			Calculating head and sector to start
			Reading contents of root directory by one sector
			Searching “CHGBIOSA.EXE”/ “CHGFIRMA.EXE” entry in
			the sector
			Reading EXE header of “CHGBIOSA.EXE”/
			“CHGFIRMA.EXE”
			Executing CHGBIOSA.EXE and CHGFIRMA.EXE
	F100h		Initializing the Ch1 of a PIT(Refresh interval 30μs)
	F101h	Checking the size and type of	Checking the size and type of DRAM( on Cold Booting)
		DRAM
			Checking the size of DRAM
		Testing the stack area of
			Testing the stack area of SMRAM
		SMRAM
	F102h	Checking and initializing	Configuring cache memory
		CMOS
			Enabling L1 cache memory
			Testing CMOS for access ( on Cold Booting)
			Checking the voltage of a CMOS backup battery
			Examining the checksum of CMOS
			Initializing data in CMOS (1)
			Setting up IRT status
			Storing the size of DRAM
	F103h	Checking for branch of	Checking for branch of resuming
		resuming
			ICH4-M Power Failure
		Copying the contents of ROM
			Examining the checksum of SMRAM
		to RAM
			Checking whether the memory configuration have been
			changed
			Examining the checksum of system BIOS RAM area
			Conducting resuming
			Disabling all SMIs

2-22 PPORTEGE R100 Maintenance Manual (960-440)