Xycom 3510T, Руководство пользователя

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3500 Flat Panel Industrial PCs
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Video Drivers
Video drivers and the expansion utilities are on the diskette included with the
documentation kit as well as on the hard drive.
For the AHIP6+ system, the video drivers are in the following directories:
C:\VGA\C&T554\WIN95
C:\VGA\C&T554\WINNT
C:\VGA\C&T\DOS\UTILITIES
For the AHIP4+ system, the video drivers are in the following directories:
C:\VGA\C&T550\WIN95
C:\VGA\C&T550\WINNT
C:\VGA\C&T\DOS\UTILITIES
Video Expansion
This section deals with the hardware expansion capability of the video controller
chip in DOS applications.
Note
It is not necessary to read this section if you are a Windows

or OS/2 user and do not
plan to run DOS

applications, and have not modified the default expansion mode in
the BIOS setup,
Unlike a CRT, a flat panel display has a fixed horizontal and vertical resolution.
There are many DOS video modes whose resolution is less than that of a flat panel
display. In order to more efficiently make use of the flat panel display’s active area,
it is necessary to employ an expansion technique which stretches the lower
resolution information to fill the higher resolution of the display. For example, DOS
defaults to VGA video mode 3+. This is an 80 column, 25-row text only screen
whose effective resolution is 640 dots x 400 scan lines. Because of this, the 800 x
600 display of the system will be partially filled by the 640 x 400 resolution of this
particular mode. By enabling the expansion function, these lower resolutions will
better utilize the display by stretching the information in an attempt to fill the
display. Operating systems such as Microsoft Windows 95, and Windows NT use
display drivers to handle the different flat panel displays. Here expansion is not
necessary since there is a specific driver for each resolution display.
Expansion does not add any resolution to the existing information; it simply stretches
the information to better fit the display. Text and graphic screens can look somewhat
grainy from the process of expansion. If the effect of expansion is undesirable, it can
be turned off either in the BIOS setup, or by executing an included utility program.
See the table below for the three utility programs included to allow expansion to be
turned on, turned off, and set back to the BIOS default state and what effect they
have on the display.
Video Expansion Options