Section1                                Multiplier

 That's a nice multiplying routine which I made by keyboard interrupts.No timers, no internal interrupts ...No anything  needed  to be set.With delay instructions, it's up to produce for 1 second interrupts.Just push and pull the buttons and see the output by LED's.It's fun and can also be used for LCD's or something else.    ( Hardware = M68HC08GP32)   

See source code