Real Time; Backup Memory - Toshiba T2150 series Maintenance Manual

3.12 Real Timer Test
To execute the Real Timer Test, select 9 from the DIAGNOSTIC TEST MENU, press Enter
and follow the directions on the screen. The real timer test contains three subtests that test
the T2150 series real timer functions. Move the highlight bar to the subtest you want to
execute and press Enter.
Subtest 01

Real Time

A new date and time can be input during this subtest. To execute the real time
subtest follow these steps:
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
2. If the current date is not correct, input the correct date at the "Enter new
date" prompt and press Enter. The following prompt will appear:
Enter new time :
3. If the current time is not correct, input the correct time in 24-hour format.
Pressing Enter toggles between the time and the date. To exit, press Ctrl +
Break.
Subtest 02

Backup Memory

This subtest performs the following backup memory check:
Writes 1-bit of "on" data to address 01h through 80h
Writes 1-bit of "off" data to address 0Eh through 80h
Writes the data pattern AAh through 55h to the RTC 114-byte memory
(address 0Eh to 7Fh)
Then the subtest reads and compares this data with the original data.
To exit, press Ctrl + Break.
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T2150 Series