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)^[1][2][3] and providing the same pixel resolutions.

Quadram Quadcolor

Release date	1983; 42 years ago (1983)
Manufactured by	Quadram Corporation
Cards
Entry-level	Quadram Quadcolor I
High-end	Quadram Quadcolor II
History
Predecessor	CGA

Quadram Quadcolor I in 640 × 200 x 2 colors (aspect ratio corrected)

Quadram Quadcolor II in 320 × 200 x 136 colors (aspect ratio corrected)

Quadram Quadcolor II in 640 × 200 x 16 colors (aspect ratio corrected)

Description

The Quadcolor has twice the memory of a standard CGA board (32k, compared to 16k),^[1][2] and offers a 640 × 200 mode with two freely definable colours.^[4] 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 — 320 × 200 resolution with 136 colors, or 640 × 200 resolution with 16 colors.^[2][5]

This card is supported by Dr. Halo II and Turbo Pascal Graphix Toolbox.^[6][7]

Models

• Quadram Quadcolor I^[6][7][4]
• Quadram Quadcolor II^[5][8][6][7]

Output capabilities

Quadram Quadcolor I offers the following modes:^[4]

• 320 × 200 with 4 colors (standard CGA mode)
• 640 × 200 with 2 colors (from a 4-bit RGBI hardware palette)

With the Quadcolor II enhancement board, Quadram Quadcolor offers the following modes: ^[5]

• 320 × 200 with 136 colors (obtained from a mix of two 16 color palettes)^[5]
• 640 × 200 with 16 colors (4-bit RGBI hardware palette).^[1][5]

See also

• Tandy Graphics Adapter, a graphics hardware system with similar capabilities.
• Plantronics Colorplus
• Hercules InColor Card
• Orchid Graphics Adapter