Move variables from assembler to C code.

Define macro VAR16FIXED for declaring a variable at a fixed location.
Introduce new file src/misc.c, and move non int15 calls from system.c
    to it.
Implement all fixed location variables in C code.
Move IDT/GDT defs to misc.c.  Remove unused gdt entry 1.
16 files changed
tree: c4cfb8b1e44679ac41abe68e25071a549a41c329
  1. .gitignore
  2. COPYING
  3. COPYING.LESSER
  4. Makefile
  5. README
  6. TODO
  7. src/
  8. tools/