DVD rom hack #1 goals

change the 2mbit flash to 4 mbit to be able to keep original and patched image
External micro controls A18 to do bankswitch between original and patched image.
drawback is chip ID changed.

keep 2mbit flash means we have no riginal image and have to fake full protocol for flashing and reading
drawback, only 6 kb of flash free in 2mbit flash

use an external micro to control WP 

use an external micro to control WP and A18.Also connetcts to rxd and txd.
Goal is to add code into 8051 core to dump sequrity sector via micro.
micro gives functions to computer via rs-232 to handle hack functions.
Hack functions will be hack on/off(also via button), backup (dump/rewrite) sequrity code.
dump sequrity sector from DVD out to Qwix.
Do software updates of "patched" version of firmware