Toshiba Portege R100 Maintenance Manual - Page 58

2 Troubleshooting 2.4 System board Troubleshooting Table 2-3 D port status (2/6) D port status F009h F100h F101h F102h F103h Inspection items Executing CHGBIOSA Checking the size and type of DRAM Testing the stack area of SMRAM Checking and initializing CMOS Checking for branch of resuming Copying the contents of ROM to RAM details Key inputting 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 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 Initializing the Ch1 of a PIT(Refresh interval 30μs) Checking the size and type of DRAM( on Cold Booting) Checking the size of DRAM Testing the stack area of SMRAM Configuring cache memory 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 Checking for branch of resuming ICH4-M Power Failure Examining the checksum of SMRAM 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)