- Motorola 6847
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The MC6847 is a video display generator (VDG) first introduced by Motorola and used in the TRS-80 Color Computer, Dragon 32/64, Laser 200 and Acorn Atom among others. It is a relatively simple display generator compared to other display chips of the time. It is capable of displaying text and graphics contained within a roughly square display matrix 256 pixels wide by 192 lines high. It is capable of displaying 9 colors: black, green, yellow, blue, red, buff (almost-but-not-quite white), cyan, magenta, and orange. The low display resolution is a necessity of using television sets as display monitors. Making the display wider risked cutting off characters due to overscan. Compressing more dots into the display window would easily exceed the resolution of the television and be useless.
Video Modes
Video Mode Resolution Colours Bytes Alphanumeric Internal 32 × 16 1 + Black 512 Alphanumeric External 32 × 16 1 + 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 1 + Black 1024 Color Graphics 2 128 × 64 4 2048 Resolution Graphics 2 128 × 96 1 + Black 1536 Color Graphics 3 128 × 96 4 3072 Resolution Graphics 3 128 × 192 1 + Black 3072 Color Graphics 6 128 × 192 4 6144 Resolution Graphics 6 256 × 192 1 + Black 6144 See also
- Motorola 6845, video address generator
- List of home computers by video hardware
- Image showing LCD or Composite Video monitor wiring
References
Categories:- Graphics chips
- Motorola products
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