In any case you might want to experiment with the hardware timer and see what happens on your system. This is a timing sensitive program, so running it on a multitasking system means that other programs will want the processor also. Make sure that you are not running processor intensive programs in the background that will ruin timing. Running Supermorse in full screen mode will also help. If you can get it to run on Fix 13 or earlier let me know.
Further investigation is in order.
Please understand that this page is dated and I hope to supppliment or replace it with a more up to date document in the future. If there are any volunteers for this chore let me know. Wish list Site maintained by Paul Davidson, VE3UUM .