2.4 System Board Troubleshooting

2 Troubleshooting Procedures

 

 

Table 2-3 D port status (5/9)

 

 

 

 

 

 

D port

Inspection items

Details

 

status

 

 

 

 

 

F106H

IRT_INI_SMBASE_END

 

 

 

 

 

 

 

 

Initialization of the device Which needs

PCI test (at Cold boot only) and Initialization

 

 

initialization before PCI BUS Initialization

 

 

 

 

 

 

 

 

 

 

Setting test pattern in PIT#0 of Channel 0

 

 

 

 

 

 

 

 

Checking whether test pattern set can be

 

 

 

read

 

 

 

 

 

 

 

 

Initializing the channel 0 of a PIT

 

 

 

(set 55ms for the interval of interrupt

 

 

 

timer)

 

 

 

 

 

 

 

 

Initializing the channel 2 of a PIT

(set 664Hz frequency for sound generator)

 

 

 

 

 

 

 

Testing the channel 1 of a PIT

(Checking whether refresh signal works

 

 

 

 

properly with the cycle of refresh interval

 

 

 

 

30µs), HLT when timeout

 

 

 

 

 

 

 

Testing the channel 2 of a PIT

(Checking whether speaker gate works

 

 

 

 

properly)

 

 

 

 

Measuring the clock speed of a CPU

 

 

 

 

 

 

 

 

 

Permission of SMI except auto-off function

 

 

 

 

 

 

 

 

 

Control the excess of the rated input power

 

 

 

 

 

 

 

 

 

Battery discharge current control (1CmA)

 

 

 

 

 

 

 

 

 

AC adapter rated over current control

 

 

 

 

 

 

 

 

 

Dividing procedures for time measuring of IRT

 

 

 

 

 

 

 

 

 

Setting for clock generator

 

 

 

 

 

 

 

 

 

Checking the parameter block A

 

 

 

 

 

 

 

 

 

Initialization of CPU

 

 

 

 

 

 

 

Confirming CPU type

 

 

 

 

 

 

 

 

Check the support of Geyserville

 

 

 

 

 

 

 

 

Set the CPU clock to “High”

Set Graphics Aperture Size

 

 

 

 

 

 

F107H

IRT_CHK_INI_SYS1_END

 

 

 

 

 

 

 

 

Storing the configuration of ROM in a

 

 

 

 

buffer

 

 

 

 

Reading EC version

 

 

 

 

 

 

 

 

 

Updating the type of flash memory

 

 

 

 

 

 

 

 

 

Determining what country the computer is

 

 

 

 

designed to be used in by DMI data

 

 

 

 

Checking the default settings of CMOS

 

 

 

 

(When finding Bad Battery, Bad

 

 

 

 

CheckSum (ROM, CMOS), set default)

 

 

 

 

Initializing ACPI table

 

 

 

 

(For executing option ROM)

 

 

 

 

 

 

 

Satellite A50S/TECRA A3X Maintenance Manual (960-534)

[CONFIDENTIAL]

2-23

Page 79
Image 79
Toshiba A3X manual Irtinismbaseend