23 lines
1.5 KiB
Markdown
23 lines
1.5 KiB
Markdown
## Open Virtual Machine Firmware (OVMF)
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This directory contains the essential components of the Open Virtual Machine Firmware (OVMF), which provides
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an open-source implementation of the Unified Extensible Firmware Interface (UEFI) for virtual machines.
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The ovmf_code files contain the CPU architecture specific UEFI firmware code, which serves as the initial boot code
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for virtual machines used to test the XTOS. It includes the necessary instructions and functions to initialize hardware,
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load the operating system, and provide various system services during the boot process. The ovmf_code file is
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responsible for establishing a UEFI environment within the virtual machine, enabling it to boot and operate effectively.
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The ovmf_pure files contains the minimum version of the CPU specific UEFI firmware code, suitable for use with Bochs.
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The ovmf_vars files, store UEFI variables, which are used to store and retrieve system configuration information, such as
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boot options, device settings, and system preferences. The ovmf_vars file contains the persistent variables specific to
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a virtual machine, allowing it to maintain its configuration across multiple boot sessions.
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## BOCHS ROM BIOS
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The rombios.bin file contains the ROM BIOS image for Bochs. This image is distributed under the GNU Lesser General Public
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License (LGPL).
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## Video BIOS (LGPL'd VGABios)
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The vgabios.bin file contains the Video Bios for Bochs and QEMU. This VGA Bios is very specific to the emulated VGA card.
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It is NOT meant to drive a physical vga card. It also implements support for VBE version 2.0.
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