40 lines
1.6 KiB
Markdown
40 lines
1.6 KiB
Markdown
SeaVGABIOS is a sub-project of the SeaBIOS project - it is an open
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source implementation of a 16bit X86
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[VGA BIOS](http://en.wikipedia.org/wiki/Video_BIOS). SeaVGABIOS is the
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default VGA BIOS on [QEMU](http://www.qemu.org/). SeaVGABIOS can also
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run natively on some X86 VGA hardware with
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[coreboot](http://www.coreboot.org/).
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Building SeaVGABIOS
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===================
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To build SeaVGABIOS, obtain the [code](Download), run `make
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menuconfig` and select the type of VGA BIOS to build in the "VGA ROM"
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menu. Once selected, run `make` and the final VGA BIOS binary will be
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located in "out/vgabios.bin".
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The choice of available VGA BIOSes within "make menuconfig" is
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dependent on whether CONFIG_QEMU, CONFIG_COREBOOT, or CONFIG_CSM is
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selected. Also, the debug options under the "Debugging" menu apply to
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SeaVGABIOS. All other options found in "make menuconfig" apply only to
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SeaBIOS and will not impact the SeaVGABIOS build.
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If SeaVGABIOS is needed for multiple different devices (eg, QEMU's
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cirrus emulation and QEMU's "dispi" emulation), then one must compile
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SeaVGABIOS multiple times with the appropriate config for each build.
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SeaVGABIOS code
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===============
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The source code for SeaVGABIOS is located in the SeaBIOS
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[git repository](Download). The main VGA BIOS code is located in the
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"vgasrc/" directory. The VGA BIOS code is always compiled in 16bit
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mode.
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The SeaVGABIOS builds to a separate binary from the main SeaBIOS
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binary, and much of the VGA BIOS code is separate from the main BIOS
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code. However, much of the SeaBIOS
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[developer documentation](Developer_Documentation) applies to
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SeaVGABIOS. To contribute, please join the
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[SeaBIOS mailing list](Mailinglist).
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