dlyons@Apple.COM (David A. Lyons) (12/07/89)
In article <1989Dec1.182211.26517@ux1.cso.uiuc.edu> jb10320@uxa.cso.uiuc.edu (Jawaid Bazyar) writes: >In article <8222.infoapple.net@pro-generic> ericmcg@pro-generic.cts.com (Eric Mcgillicuddy) writes: >>In-Reply-To: message from jb10320@uxa.cso.uiuc.edu >> >>It seems to me the debugger replaces the instruction with a BRK instruction >>and then traps the interupt whern it hits it. If the interupt were disabled >>would this affect the BRK? I would like to know since I am working with >>interupts on my own project and am having a rough time of it. BRK instructions can't be disabled (even though they get dispatched through the same vector as interrupt requests (IRQs)). >As far as I've noticed, the debugger breakpoints only >function during a step or trace operation. I manually use the BRK breakpoint >method when I need to run my code at full-speed. The debugger provides the option of setting real breakpoints that work when executing real-time code. It's in the manual & (at least in some versions) in the BP online help. -- --David A. Lyons, Apple Computer, Inc. | DAL Systems Apple II Developer Technical Support | P.O. Box 875 America Online: Dave Lyons | Cupertino, CA 95015-0875 GEnie: D.LYONS2 or DAVE.LYONS CompuServe: 72177,3233 Internet/BITNET: dlyons@apple.com UUCP: ...!ames!apple!dlyons My opinions are my own, not Apple's.