changed "BusLog" macro to automatically insert a line break
add syscall and break instructions
add remaining load/store instructions
add mult, multu, mfhi, mflo, mthi, mtlo
add remaining alu operations
add remaining control flow instructions
add coprocessor instructions
clean up the 'ex' and 'rf' stages, bios now polling the gpu status register.
implement an extremely basic gpu to get the ball rolling