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Here's what I do. I've been wondering if it's a good idea: I compile the interrupt routine with the switch that causes it to stop after translating to assembler. I hand-edit it, changing the rts opcode to rte. Then I assemble it and link. It's worked for small programs I use for hardware checkout, but I haven't dug through it to make sure the stack is being cleaned up properly. Anyone care to comment? -- John A. Breen jab3@hotmail.com ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com