small kernel to test a few lowest level things
work in progress
minor fixes
improved Makefile/Build-System to enable 32-/64-Bit selection
clean up the crappy API from that tutorial, this code was based on. No warnings any more.
64 bit bootstrap; try to include 64 bit kernel into elf32-multiboot kernel (not working, yet)
further experiments to understand build64.sh
one step ahead, but still not in correct order
booting a 64 bit kernel via ELF32 (sic!) binary works now. Thanks a lot, OSDEV!
Commit current state.
Unclear what went wrong, but currently, not even the start64.asm is running...
(Last commit was better)

To do (except from fixing that nothing works): why does printf not work
works again: loading ss (stack segment) in 64 bit mode was the trigger; without is fine
translated build64.sh into Makefile (using two additional python scripts)
fixed printf() for 64 bit (was taken from example in multiboot specification): the problem was that AMD64-ABI does not use the stack for the variadic parameters. Now, __builtin_va_list is used.
openSUSE appears to link a .comment.SUSE.OPTs section into my kernel. Replaced (.comment) below DISCARD with (.comment*); that's it (for now...)
map some more pages (for I/O and local APIC)
on the way to handle multiple cpus... (a long one)
 * 32 bit: set own GDT (so far, the one installed by GRUB was used)
 * install IDT and exception handlers
 * main() divides by zero to test exception
--> 32- and 64-bit mode working
parse multiprocessor tables (not completely finished, yet)
 - improved build: Makefile with auto-depend
 - moved common code from start{32,64}.asm to included start.asm
 - some more refactoring in boot32.c
 - added config.h for global build configuration
 - new hw_info_t structure for information gathered while 
   in real-mode boot code (boot32.c) for use in actual kernel
 - some more minor clean-up
- included headers with structures for BDA, ACPI and MPS from biostables
- start reading those tables (adopted from biostables)
- some minor fixes and improvements