#+begin_src
0xFFFFFFFF +-----------------------+
           | isa mmio              |
0xFFFFF000 +-----------------------+
		   .                       .
		   .                       .
		   .                       .
0xFFFBFFFF +-----------------------+
           | video ram             |
0xFFFB0000 +-----------------------+
           .                       .
		   .                       .
		   .                       .
0xFFF00000 +-----------------------+
           | ROM                   |
		   +-----------------------+
		   | RAM                   |
0x00000000 +-----------------------+
#+end_src