4-8 Chapter 4, Advanced Diagnostics Program

The following paragraphs describe the tests for the various video configurations.

Video Controller

The Video Controller selection verifies the integrity of the video display controller, the video graphics controller, or the enhanced color graphics board.

80 x 25 Display

The 80 x 25 Display selection verifies that the system can operate in both the high-resolution and low-resolution modes.

The screen for the 80 x 25 high-resolution text mode (9 x 14 character matrix) using inverted video appears similar to Screen 1.

Display Characteristics

The Display Characteristics selection verifies the ability of the video display controller and moni- tor to display certain attributes: various intensi- ties, blinking, and reverse video.

Character Set

The Character Set selection verifies that the system can display all of the available character patterns.

Screen 1.

Addendum 108431-001 (11-88) to Manual No. 108033-003

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Compaq 386 manual Video Controller, 80 x 25 Display, Display Characteristics, Character Set