MediaWiki:Sitenotice:
2025-12-29: I have restored the wiki to a backup from the end of November. Starting in September 2025, accesses went form the 800MB-1.2GB range per month to 26GB in September, 42GB in October, and 70GB in November with most accesses originating from China. As soon as I realized what was causing all the access problems in November, I shut it down (it had reached 36GB by then) behind a password/login screen. The database had gotten corrupted, and I tried a restore from just before the spike in access but that didn't work. Thus, end of November. I still have the other daily backups so if there were any important additions in December, let me know and maybe they can be recovered. - Allen H.
VDG: Difference between revisions
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It is also used in the following computers of the time: [[Dragon 32/64]], [[Laser 200]] and [[Acorn Atom]]. | It is also used in the following computers of the time: [[Dragon 32/64]], [[Laser 200]] and [[Acorn Atom]]. | ||
{| class="wikitable" | |||
! 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 | |||
|} | |||
Revision as of 11:28, 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 | 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 |