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3 Tests and Diagnostics 3.10 Real Timer Test
3-28 PORTEGE A100 Maintenance Manual (960-460)
3.10 Real Timer Test
To execute the Real Timer Test, select 9-REAL TIMER TEST from the DIAGNOSTIC TEST
MENU, press Enter and follow the directions on the screen. The real timer test contains three
subtests. Move the highlight bar to the subtest you want to execute and press Enter.
Subtest 01 Real time
This subtest displays and changes the current date and time stored in the real time
clock. To execute the real time subtest follow these steps:
Step 1: Select subtest 01 and the following message will appear:
Current date : XX-XX-XXXX
Current time : XX:XX:XX
Enter new date:
PRESS [ENTER] KEY TO EXIT TEST
Step 2: If the current date is not correct, input the correct date and press Enter.
The date is updated and the following prompt will appear:
Enter new time :
Step 3: If the current time is not correct, input the correct time in 24-hour format.
The time is updated and the following message appears.
The date and time switches by pressing Enter. To exit this subtest, press
Enter during “Enter new time : ” display.
The date and the time are displayed alternately by pressing Enter. To exit, press
Ctrl + Break.
Subtest 02 Backup memory
This subtest checks the following backup memories:
Writes 1-bit of “on” data (01h through 80h) to address 0Eh through 7Fh
Writes 1-bit of “off” data (FEh through 7Fh) to address 0Eh through 7Fh
Writes the data pattern AAh and 55h to the address 0Eh to 7Fh
Then the subtest reads and compares this data with the original data.