Note

EGA and VGA controller boards are available with higher resolutions than the maximum defined by the standards. The optional EGA video system for this computer provides up to 1056x352 dot resolution for a text display of 132 columns x44 lines, and up to 800 x 600 resolution for color graphics.

Monitor Types

There are many different types of video monitor available. Some of the major ones are described below.

Composite Video:

With a 300 x 200 resolution, this type of monitor is usually used with home computers. They are not recommended for use with your system.

TTL Monochrome:

These monitors provide up to 1000x350 resolution, with either a green or amber colored screen. Primarily intended for text only applications, these monitors can run Hercules-compatible graphics programs, although applications requiring full CGA or EGA color compatibility will be difficult, if not impossible, to use. A TTL monochrome monitor and a Hercules compatible controller board will meet your computer system’s basic video display monitor needs.

RGB Color:

RGB stands for Red, Green and Blue, and indicates that each of the primary colors are separately driven by the video controller board. RGB monitors cover a broad range of resolutions from 320 x 200 up to the higher EGA ranges of 720 x 480. RGB color monitors are very

C-4 Video Monitor Systems