VGA Resources: Difference between revisions
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(Added a link to the FlingOS as it's fairly well documented, designed for learning from and a good place to start looking for an example of how to implemented a protected-mode VGA driver.) |
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* [http://files.osdev.org/mirrors/geezer/software/90x60.asm 90x60 text mode] from Chris Giese <geezer@execpc.com> |
* [http://files.osdev.org/mirrors/geezer/software/90x60.asm 90x60 text mode] from Chris Giese <geezer@execpc.com> |
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* [http://files.osdev.org/mirrors/geezer/osd/graphics/modes.c Changing text mode |
* [http://files.osdev.org/mirrors/geezer/osd/graphics/modes.c Changing text/graphic mode and fonts] -- this also has code for switching video modes without bios |
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Revision as of 18:10, 20 September 2018
VGA Resources
- This wiki
- Google Search "VGA registers programming",
- OSD: Graphics From Chris Giese, containing many code snippets.
- Tutorial on VGA graphics including basis of font and line rendering, palette setting, unchained mode, etc.
- FlingOS VGA Driver has a good (low-performance but easy to read, protected-mode) VGA driver supporting text and graphical modes
Free VGA
- Graphics Registers -- control the way the CPU accesses video RAM.
- Sequencer Registers -- control how video data is sent to the DAC.
- Attribute Controller Registers -- selects the 16 color and 64 color palettes used for EGA/CGA compatibility.
- CRT Controller Registers -- control how the video is output to the display.
- Color Registers -- selects the 256 color palette from the maximum possible colors.
- External Registers -- miscellaneous registers used to control video operation.
SVGA resources
- The VESA home page: http://www.vesa.org
Selected coding tricks
- 90x60 text mode from Chris Giese <geezer@execpc.com>
- Changing text/graphic mode and fonts -- this also has code for switching video modes without bios