Toshiba TOSHIBA NB100 manual Diagnostic Programs Video

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

46TOSHIBA NB100 Maintenance Manual