Dell OptiPlex GX1 - Manual (Page 150)

Diagnostic Video Tests: Dell OptiPlex GX1 Small-Form-Factor System User's Guide
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Character Set Subtest (80 x 25)
The 80-column x 25-line character set subtest displays all 256 characters in the American Standard Code for
Information Interchange (ASCII) character set in 80-column by 25-line text mode. Figure 2 shows an
example of the character set subtest screen.
Figure 2. 80-Column x 25-Line Character Set Subtest Screen