Toshiba A105-S2712 Maintenance Manual - Page 128
Diagnostic Programs, 8 Video, 25 Text Mode
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3 Diagnostic Programs 3.8 Video 4. Text Color This test item is to check whether all 16 colors foreground and all 8 colors background works normally in VGA text mode. The bit4-6 of the attribute byte of a character defines 8 background colors (black, blue, green, cyan, red, brown, magenta, and light gray), and the bit0-3 defines 16 foreground colors (dark gray, light blue, light green, light cyan, light red, light magenta, yellow, and white besides the above 8 colors). In the test, user is required to respond according to the instruction in the screen. 5. 80 * 25 Text Mode This test item is to check whether 80*25 Text Mode works normally. 52 Satellite A100/A105 / TECRA A7 Maintenance Manual
3
Diagnostic Programs
3.8 Video
52
Satellite A100/A105 / TECRA A7 Maintenance Manual
4.
Text Color
This test item is to check whether all 16 colors foreground and all 8 colors
background works normally in VGA text mode.
The bit4-6 of the attribute byte of a character defines 8 background colors (black,
blue, green, cyan, red, brown, magenta, and light gray), and the bit0-3 defines 16
foreground colors (dark gray, light blue, light green, light cyan, light red, light
magenta, yellow, and white besides the above 8 colors).
In the test, user is required to respond according to the instruction in the screen.
5.
80 * 25 Text Mode
This test item is to check whether 80*25 Text Mode works normally.