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3 Diagnostic Programs 3.8 Video
3.8 Video
This test item tests the video by:
1. displaying the figures in different graphic modes.
2. displaying the property and color of the characters in different text modes.
User will confirm whether each video mode works normally by judging whether the display
is correct. It checks whether the video memory works normally by writing data into the video
memory, then reading it out and comparing the two value.
Subtest 01 Text Mode
1. Character Test
Tests two types of font patterns.
Font 9*14
Font 9*16
It requires the user to check whether all characters of each font type displayed
correctly by answering the questions prompted on screen. It will be displayed as
follows:.
2. Text Attribute
This test item is to check whether the text attribute of normal, hi-intensity,
inverse, and blinking in VGA text mode could be correctly displayed on the
screen.
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TOSHIBA NB100 Maintenance Manual