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B. VIDEO MODES
The following topics summarize the video modes available on the ZT 6631 and give
specifications for each mode.
STANDARD MODES
The ZT 6631 supports all standard VGA modes. These standard VGA modes are listed
in the "
Standard VGA Modes
" table following.
Note that the EGA-compatible text modes (which use an 8x14 font) and graphic modes
10 and F use a 16 dot high font, with the bottom two lines truncated, in the absence of
the 8x14 Font TSR (TSRFONT). This creates some errors in displaying characters with
descenders, but does not restrict operation of programs using these modes.
In text modes using the 8x14 font, the characters "g," "j," "p," "q," "y," and "ÿ" are
truncated using a middle and bottom line algorithm to avoid truncation of descenders.
For compatibility with some DOS applications that use the 8x14 font, the TSRFONT
utility should be used. Applications such as DOSSHELL in Graphics 25 or 34 line
display modes require the TSRFONT utility to be loaded.
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