Plantronics Colorplus
graphics card for IBM PC computers
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.
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.
Output capabilities
CGA compatible modes:
160 × 100 16 color mode (actual a text mode using , ▌, ▐ and █)
320 × 200 in 4 colors from a 16 color hardware palette. Pixel aspect ratio of 1:1.2.
640 × 200 in 2 colors.
This brief starts where responsible research should: with the source description of “Plantronics Colorplus” as graphics card for IBM PC computers. Everything that follows is an evidence route, not borrowed authority.
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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Mar 7, 2026. The linked authority identifier is Q7201657. None of the 1 selected statements returned an explicit reference. The first chronological checks are 1982 and 1968.
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This entry incorporates text from “Plantronics Colorplus” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.