try to fix serial monitor not being able to talk to CPU and reset
logic working at the same time.
indent function
fixes to reset logic.
make reset logic more robust.
add more debug visibility in serial monitor to try to find out
why CPU stops responding to monitor requests after reset.
improve reset logic to try to avoid getting stuck if reset
occurs in the middle of a memory access.
show memory wait states in monitor.
do nothing but reset when reset line low. reindent whole file.
fix reset entry vector (was $FFFE instead of $FFFC)
remove memory write wait state to try to fix CPU jamming when
free running.
fix bugs with memory waitstate handling.
adjust wait states for 64MHz CPU.
implement most branch instructions (untested)
fix back-to-back single-cycle operations.
show PC, CPU state and memory wait states on seg led display.
fix variable name.
try to fix set program counter via serial monitor.
try to fix set pc via serial monitor.