Toshiba Satellite, M40 manual Video Diagnostic Programs

3.8 Video 3 Diagnostic Programs

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.

Satellite M40/M45 TECRA A4 Dynabook Vx/4 Maintenance

Manual 47