Docs: Reword and extend SeaBIOS description
The sentence about using SeaBIOS as secondary payload sounded confusing, so reword it. While at it, improve and extend on SeaBIOS features. Change-Id: Ic06b9f56ab8082f2e6eff5fd8d31525429fd948d Signed-off-by: Bill XIE <persmule@hardenedlinux.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/64958 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
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@ -11,11 +11,11 @@ payload or can be made to work as one.
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[SeaBIOS](https://www.seabios.org) is an open source implementation of
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the PCBIOS API that exists since the original IBM PC and was extended
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since. While originally written for emulators such as QEMU, it can be made
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to work as a coreboot payload and all the necessary code is in SeaBIOS'
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mainline code, or as a secondary payload load by another payload, e.g. it
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can be loaded from GRUB2 with the following menuentry in the run time
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config of GRUB2:
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since. While originally written for emulators such as QEMU, it can be built
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as a coreboot payload. It supports executing Option ROMs in a more complete
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fashion than coreboot. It also supports Multiboot.
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When chainloaded from GRUB2, the following menuentry could be used:
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menuentry "SeaBIOS" --unrestricted {
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root=(cbfsdisk)
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