On Wed, Apr 30, 2008 at 12:35:05PM -0700, Eric W. Biederman wrote: > ... if we could ever figure out what we are doing that confuses the > hardware the other path could be used. In principle, purgatory could load GDB stubs and keep them around at least long enough to debug code running in 16-bit mode, right? It would be nice if somebody would do that. :-) For a lot of my recent kexec work, I found it very helpful to use the gdbserver in qemu, though I had to abandon it eventually due to emulation bugs. > For video mode changing it might be possible to just run the vga > BIOS calls and make them work. I was relying on vesafb in the kernel I wanted to boot. It turns out that --real-mode works great on every machine I have handy, but doesn't work for one of my co-workers. So I'm going to see if uvesafb works better, in the next day or two hopefully. http://dev.gentoo.org/~spock/projects/uvesafb/ I'm hoping that running the video BIOS in an x86 emulator works reliably, and that that's the only boot failure I encounter. :-) Jamey
