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VDG: Difference between revisions
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{| class="wikitable" | {| class="wikitable" | ||
! Video Mode !! Resolution !! Colors !! Bytes | ! Video Mode !! Resolution !! Colors !! Bytes !! $FF22 value | ||
|- | |- | ||
|Alphanumeric Internal | |Alphanumeric Internal | ||
| Line 14: | Line 14: | ||
|8 + Black | |8 + Black | ||
|512 | |512 | ||
| | |||
|- | |- | ||
|Alphanumeric External | |Alphanumeric External | ||
| Line 19: | Line 20: | ||
|8 + Black | |8 + Black | ||
|512 | |512 | ||
| | |||
|- | |- | ||
|Semigraphics 4 | |Semigraphics 4 | ||
| Line 24: | Line 26: | ||
|8 + Black | |8 + Black | ||
|512 | |512 | ||
| | |||
|- | |- | ||
|Semigraphics 6 | |Semigraphics 6 | ||
| Line 29: | Line 32: | ||
|4 + Black | |4 + Black | ||
|512 | |512 | ||
| | |||
|- | |- | ||
|Color Graphics 1 | |Color Graphics 1 | ||
| Line 34: | Line 38: | ||
|4 | |4 | ||
|1024 | |1024 | ||
| | |||
|- | |- | ||
|Resolution Graphics 1 | |Resolution Graphics 1 | ||
| Line 39: | Line 44: | ||
|Black & White | |Black & White | ||
|1024 | |1024 | ||
| | |||
|- | |- | ||
|Color Graphics 2 | |Color Graphics 2 | ||
| Line 44: | Line 50: | ||
|4 | |4 | ||
|2048 | |2048 | ||
| | |||
|- | |- | ||
|Resolution Graphics 2 | |Resolution Graphics 2 | ||
| Line 49: | Line 56: | ||
|Black & White | |Black & White | ||
|1536 | |1536 | ||
| | |||
|- | |- | ||
|Color Graphics 3 | |Color Graphics 3 | ||
| Line 54: | Line 62: | ||
|4 | |4 | ||
|3072 | |3072 | ||
| | |||
|- | |- | ||
|Resolution Graphics 3 | |Resolution Graphics 3 | ||
| Line 59: | Line 68: | ||
|Black & White | |Black & White | ||
|3072 | |3072 | ||
| | |||
|- | |- | ||
|Color Graphics 6 | |Color Graphics 6 | ||
|128 × 192 | |128 × 192 | ||
|4 | |4 (GYBR) | ||
|6144 | |||
| | |||
|- | |||
|Color Graphics 6 | |||
|128 × 192 | |||
|4 (WCMO) | |||
|6144 | |6144 | ||
| | |||
|- | |- | ||
|Resolution Graphics 6 | |Resolution Graphics 6 | ||
| Line 69: | Line 86: | ||
|Black & White | |Black & White | ||
|6144 | |6144 | ||
| | |||
|} | |} | ||
Revision as of 14:18, 14 May 2013
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 | $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 | |
| Color Graphics 6 | 128 × 192 | 4 (WCMO) | 6144 | |
| Resolution Graphics 6 | 256 × 192 | Black & White | 6144 |