Toshiba T2150CD Series Manual page 91

program or until you (or your program) specify a different video mode.
There is no danger in selecting different video and screen modes. Try different color settings
until you're satisfied with the result. Many applications make it easy for you to experiment.
You may find the following points helpful in making your selection:
For software that supports only text modes, 80 columns x 25 lines displays twice as
much information as 40 columns x 25 lines (2,000 characters and 1,000 characters,
respectively). Some software also supports 132 columns x 43 lines, or even 132
columns x 50 lines.
If your software supports both graphics and text modes, the screen display may appear
to operate faster using a text mode.
The LCD's highest graphics resolution is 640 columns x 480 lines.
Displaying Colors
The T2150CDT's TFT panels can display up to 16 colors out of a possible 256K colors in
text mode. In graphics mode, the panels can display 256 colors out of a possible 256K
colors and 32K/64K colors. The T2150CDS's STN panels can display in 16 colors out of a
possible 4096/222K in text mode and in graphics mode they can display 256 colors out of a
possible 4096/222K colors.
Some software packages have a setup program that requires you to choose a graphics mode.
When you choose a mode, consider the following:
The T2150CD series's VGA compatible controller allows the software to make full use
of the VGA controller's capabilities.
In 640 x 200 mode, the LCD display forms each pel from two pixels.
In 320 x 200 mode, the LCD display forms each pel from four pixels arranged in a
square.
If you are using a VGA compatible analog external monitor, up to 256 colors, out of the
maximum 256K colors, may be displayed simultaneously. The T2150CDT also has
display modes for 32K out of 32K colors and 64K out of 64K colors.
Using an External Color Monitor
The T2150CD series computers support VGA and Super VGA video modes. You can use a
high-resolution monitor connected to the external monitor port on the computer or to the
external monitor port on an optional port replicator. See
information on connecting an external monitor and a port replicator.
Chapter 12, Optional Devices, for