fix CIA phi0 to be 1MHz instead of 500KHz.
fix bug in DMAgic list setting.
add $D7FF as magic register to re-enable kickstart ROM after boot.
merge in changes to kickstart, including sw15 to pause boot.
increase cpu clock speed to 48MHz.
adjust uart speed to suit 48MHz CPU.
show opcode in register output of serial monitor.
show arguments to last instruction in serial monitor register
output.
give up and go back to 32MHz for now.