🚀 go-pugleaf

     I am having problems setting up a real time interrupt. I would like the
interrupt that signals every 20ms or so. I am first setting RTII bit in TMSK2
register $1024. This I think enables the RTI interrupt. Then I am setting the
RTI vector $fff0 with the address of my routine. The first part of my routine
clears RTIF bit in TFLG2 $1025. Then I have my routine with it ending RTI. All
my interrupt routine does is count ten of these RTI and then sets a port where
I have an led connected. Then it turns the led off and resets count (a memory)
location to 0. This way I have a delay. My problem is while in PC BUG I get
locked out and the led doesnt light. I know I am not overwriting the PCBUG
talker and the led routine works fine. My problem is with the RTI. Any
suggestions would be great. Also does anyone have any suggestions to a lab
type manual with experiments to be conducted with an HC11. Well thanks.



                                                         Alex Jeannopoulos