OK, My JMP question is about copying a drives mbr to memory 0x7c00 and or 0x0600 at 512 byte blocks. Which is doable. I haven't decided wetheir to try Ron's suggestion and try to execute the mbr (hence the JMP question) OR we could even write code to translate the mbr and JMP/execute directly to the active bootable partition OR even better we could write code translate the mbr, goto the active bootable partition and translate it, and JMP/execute right to the boot manager, thus bypassing a whole bunch of real mode interrupts. What do you think?
The question is: Do you know if coreboot ties up any memory at these addresses?