Toshiba M200-ST2002 Maintenance Manual - Page 63

2.4 System Board Troubleshooting 2 Troubleshooting D port status F104h F106h Table 2-3 D port status (4/7) Details Remarks Initializing SMRAM Checking factor of WakeUp Rewriting SMRAM base and storing CPU state map for BIOS Enabling SMI by ASMI Initializing devices which need initialization before 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) HALT when time out occurs. 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) 2-25