Quadram Quadcolor

The Quadram Quadcolor is a graphics card for IBM PC computers by Quadram Corporation, first sold in 1983. It is a superset of the then-current CGA standard, using the same monitor standard (4-bit digital TTL RGBI monitor or NTSC composite video) and providing the same pixel resolutions.

Description
The Quadcolor has twice the memory of a standard CGA board (32k, compared to 16k), and offers a mode with two freely definable colours. If used with the Quadcolor II enhancement board, the additional memory can be used in graphics modes to double the color depth, allowing for two additional graphics modes — resolution with 136 colors, or  resolution with 16 colors.

This card is supported by Dr. Hallo II and Turbo Pascal Graphix Toolbox.

Models

 * Quadram Quadcolor I
 * Quadram Quadcolor II

Output capabilities
Quadram Quadcolor I offers the following modes:


 * with 4 colors (standard CGA mode)
 * with 2 colors (from a 4-bit RGBI hardware palette)

With the Quadcolor II enhancement board, Quadram Quadcolor offers the following modes:
 * with 136 colors (obtained from a mix of two 16 color palettes)
 * with 16 colors (4-bit RGBI hardware palette).