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VDG

From CoCopedia - The Tandy/Radio Shack Color Computer Wiki
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Merge
It has been suggested that this page be merged with Video Display Generator (Discuss)
Merge
It has been suggested that this page be merged with Motorola 6847 (Discuss)

The VDG or MC6847 is the video display generator from Motorola used in the TRS-80 Color Computer

It can display text and graphics within a matrix of 256 pixels wide by 192 lines high.

It can display a maximum of 9 colors: black, green, yellow, blue, red, buff (almost-but-not-quite white), cyan, magenta, and orange.

It is also used in the following computers of the time: Dragon 32/64, Laser 200 and Acorn Atom.

Video Mode Resolution Colors Bytes Shorthand PMODE SCREEN $FF22 value
Alphanumeric Internal 32 × 16 8 + Black 512
Alphanumeric External 32 × 16 8 + Black 512
Semigraphics 4 64 × 32 8 + Black 512
Semigraphics 6 64 × 48 4 + Black 512
Color Graphics 1 64 × 64 4 1024
Resolution Graphics 1 128 × 64 Black & White 1024
Color Graphics 2 128 × 64 4 2048
Resolution Graphics 2 128 × 96 Black & White 1536
Color Graphics 3 128 × 96 4 3072
Resolution Graphics 3 128 × 192 Black & White 3072
Color Graphics 6 128 × 192 4 (GYBR) 6144 6C0 3 1,0 d0
Color Graphics 6 128 × 192 4 (WCMO) 6144 e0
Resolution Graphics 6 256 × 192 Green & White 6144 f0
Resolution Graphics 6 256 × 192 Black & White 6144 f8

See Also