Plantronics Colorplus

The Plantronics Colorplus is a graphics card for IBM PC computers, first sold in 1982. It implements a superset of the then-current CGA standard, using the same monitor standard (4-bit digital TTL RGBI monitor) and providing the same pixel resolutions. It was produced by Frederick Electronics (of Frederick, Maryland), a subsidiary of Plantronics since 1968, and sold by Plantronics' Enhanced Graphics Products division.

Plantronics Colorplus
Release date1982 (1982)
Manufactured byPlantronics Enhanced Graphics Products
Designed byFrederick Electronics
ArchitectureMotorola MC6845
Cards
Entry-levelPlantronics Colorplus
High-endATI Graphics Solution, Paradise AutoSwitch EGA 480
History
PredecessorCGA
SuccessorEGA
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The Colorplus has twice the memory of a standard CGA board (32k, compared to 16k). The additional memory can be used in graphics modes to double the color depth, giving two additional graphics modes—16 colors at 320 × 200 resolution, or 4 colors at 640 × 200 resolution.

It uses the same Motorola MC6845 display controller as the previous MDA and CGA adapters.

The original card also includes a parallel printer port.

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