Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!apple!snorkelwacker!usc!samsung!uunet!mcsun!ukc!edcastle!elee24 From: elee24@castle.ed.ac.uk (H Bruce) Newsgroups: comp.sys.ibm.pc.misc Subject: When CTRL+C doesn't work. Message-ID: <6241@castle.ed.ac.uk> Date: 11 Sep 90 13:02:59 GMT Organization: Dept. Electrical Engineering, Edinburgh University, Scotland, UK. Lines: 16 I am getting more distenchanted with my PC ....... I am implementing image processing algortihms (using Microsoft C 5.1). Such algorithms consist of many nested loops. When a bug in my code causes a loop never to exit the PC hangs. This is not because DOS has crashed but beacuse the microprocessor cannot be interrupted by CRTL+C or CTLR+BREAK. This result is that the PC must be rebooted. This is a very time consuming way to find bugs ! Does anyone know how I can interrupt the program ? Putting "break=on" into my config.sys file makes no difference. Thanks, Henry Bruce.