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Diffstat (limited to 'sys/i386/boot/dosboot/readme')
-rw-r--r-- | sys/i386/boot/dosboot/readme | 41 |
1 files changed, 0 insertions, 41 deletions
diff --git a/sys/i386/boot/dosboot/readme b/sys/i386/boot/dosboot/readme deleted file mode 100644 index f4e273f..0000000 --- a/sys/i386/boot/dosboot/readme +++ /dev/null @@ -1,41 +0,0 @@ -Hi Everybody!
-
-This is version 1.5 of "fbsdboot", a program that allows you to boot a kernel
-from a MS-DOS partition or a FreeBSD partition. This program runs using DOS.
-It works with various memory managers (like EMM386, 386MAX) under certain
-circumstances.
-
-First, a FreeBSD kernel is always loaded to memory starting at 0x100000. To
-assure that loading the kernel *does not* overwrite memory used by memory
-managers, high memory for the kernel is allocated and after loading the kernel
-it's moved to 0x100000.
-
-Second, there are many ways to switch to protected mode which is necessary to
-start the kernel. Each BIOS gives you the possibility to use INT15H (AH=89H)
-to do that. But some memory-managers like 386max does not allow you to use
-this method.
-
-An other way to do the switch is to use DPMI services, but they do not
-guarantee, that the protected mode application is executed with privilege
-level 0. Therefore this method is *not* used.
-
-VCPI services offer another way to switch to protected mode, and VCPI servers
-are built into "emm386.exe", "386max" and "qemm". That's why, this method is
-implemented in fbsdboot.exe.
-
-Fbsdboot.exe tries to switch to protected mode using VCPI services. If they're
-not available INT15H is used to do the switch. If that fails, it's not possible
-for this version of fbsdboot.exe to boot a kernel :-(.
-
-You can get commandline options of fbsdboot if you start it with "-?" as option!
-
-I don't know, if fbsdboot works with QEMM, as I don't have the possibility to
-test it.
-
-Enjoy and have fun!
-
-Christian.
-cg@fimp01.fim.uni-linz.ac.at
-
-
-PS: Many thanks to Bruce Evans for his assistance!
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