RAM
Move all code that is not essential before we copy code to RAM from
sysinit.c to BaS.c. Thus we only run basic initialization from flash and
everything else after RAM copy
Using a negative number to set the device as not existing
was incorrect, we set the device as a slow device (3) and
set the "not wait" bit like BaS CodeWarrior does.
For some reason which I coudn't figure it out FireTOS
fails to boot randomly when we turn on the MMU before
the IDE ports are initialized (FireTOS doesn't detect
the IDE devices). This is fixed when we turn on the MMU
after the IDE initialization. CodeWarrior BaS does it
this way too.
