| MediaWiki:Sitenotice |
|---|
| 2026-03-12: Cocopedia.com is now using a new caching system that should make things faster. Please let me know if you encounter any new issues.
2026-03-15: MediaWiki has been reinstalled and the old database and files restored. It was pretty clogged up from being upgraded so many times since 2004. I am also testing out Cloudflare to see if it can prevent the 'bot assaults that took the site down last year. 2026-03-16: Special thanks to Don Barber for hosting a backup mirror of CoCopedia: https://cocopedia.dgb3.net |
VDG
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 | 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 |
