Hello,
I am running a hardware interrupt on RB0 (rising edge trigger). I use RB0 to interrupt the micro which is (I assume) sitting at a DEBUGIN waiting for serial data.

The inline assembly code (as listed in the datasheets 16F877A) to take care of house keeping going in and coming out of the interrupt is present. During an interrupt I jump to a "call routine" which jumps out and runs some code in Picbasic, then returns. The problem I have is in this routine called from within the interrupt is supposed to toggle port bits (1 through 8, bitwise) written in Picbasic. The problem is it does not toggle. It seems to only go HIGH but will not go LOW.

Anyone run into this issue where toggle does not work? I will post the code tomorrow for reference...I have been trying to figure this out for over 1.5 days now.

Thanks!
Nick