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Jonathan Campbell 2025-03-31 03:35:26 -07:00
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README.video-debug-overlay.md
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@ -111,3 +111,17 @@ CS_xx_: Attribute controller color select. _xx_ is two hexadecimal digits. Does
# On the right: palette per scanline
The color palette rendered per scanline on the right is based on CSPAL in case of per-scanline changes to do palette tricks or demoscene tricks, such as showing more than 16 colors in a 16-color mode.
## On the right: Hardware change event tags
If a change or event that is notable occurs on a scanline, a tag will appear with the top right on that scanline noting that event.
| event | tag |
| --------------------------------------------------------------------- | ----------------------- |
| EGA/VGA line compare match (split screen) | SPLIT LNCMP |
| Change of Maximum Scan Line register | MXS |
| Change of Offset register | OFS |
| Change of horizontal retrace | HRT |
| Change of color plane enable | CPE |
| Change of color select | CSL |
| Start of a PC-98 display partition _n_ (text) | TPART_n_ |
| Start of a PC-98 display partition _n_ (graphics) | GPART_n_ |