Here are the results. Are these typical?

Code:
start:
pauseus 1
toggle portd.1
goto start
375 KHz

Code:
start:
toggle portd.1
goto start
1 MHz

Code:
start:
Portb.1 = ! Portb.1
goto start
This does nothing

Code:
start:
portd.1=1
portd.1=0
goto start
3 MHz