> > Then the MIPS architecture puts its exception vectors (trap entry
> > points) down at 0x8000 0000 and nearby.
> > DEC must be doing something with the bottom 192Kbytes of
> > memory.... but that's there problem.
> Yeah - the DEC boot proms make use of the 128K above the first 64k
> as space for variables. At the moment we need to use the boot prom
> code for printing to the console, so we leave it free. Later we can
> make use of it, but first we must write some device drivers.
You might save these first 192kb to some safe place such that you can
later swap them again into their old place and make use of the firmware -
if that's of interest. Best place would be somewhere in the swap
space on disk if available.