joncampbell123/dosbox-x
1
0
Fork 0
mirror of https://github.com/joncampbell123/dosbox-x.git synced 2025-10-14 02:17:36 +08:00
Code Issues Packages Projects Releases Wiki Activity

oops

Browse Source
This commit is contained in:
Jonathan Campbell
2025-03-31 03:42:49 -07:00
parent 90a1a2a9f3
commit 5003fed8dd
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
README.video-debug-overlay.md
View File

@@ -87,7 +87,7 @@ EPAL shows the palette in effect for the display mode. The number of colors show
No palette is shown for highcolor/truecolor (15/16/24/32bpp) graphics modes.
A 6 or 8 is shown after RPAL and EPAL to indicate DAC width, the number of bits used to represent the R/G/B values sent to the DAC and out the VGA connector when a color palette is involved. Standard VGA and early SVGA modes use a 6-bit DAC width. Later SVGA hardware allows switching between 6 and 8 bits per RGB. There is a VESA BIOS call to set DAC width, which DOSBox-X does emulate for S3 hardware.
A 6 or 8 is shown after RPAL and EPAL to indicate DAC width, the number of bits used to represent the R/G/B values sent to the DAC and out the VGA connector when a color palette is involved. Standard VGA and early SVGA cards use a 6-bit DAC width. Later SVGA hardware allows switching between 6 and 8 bits per RGB. There is a VESA BIOS call to set DAC width, which DOSBox-X does emulate for S3 hardware.
ACPAL shows the color palette according to the Attribute Controller. In modes other than 256-color mode, this is used to map pixels rendered from video memory to the VGA palette. In 256-color mode, but not SVGA, this has an effect on the pixels as if the 8-bit pixel were split into two 4-bit parts and remapped, except for Tseng ET4000 which remaps only partially due to a hardware bug.