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07/04/02 23:17
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 		 #25310 - RE: 80c52 uP board halted when connect PC
Can you run your 8051 software in a simulator, and connect that to the offending PC?
That might help distinguish whether this is a hardware (noise, spikes, etc) or software (bad data causes crash) problem.

What happens if you get the PC started & stable *before* you connect it to your 8051 system?

List of 20 messages in thread
TopicAuthorDate
80c52 uP board halted when connect PC            01/01/70 00:00      
RE: 80c52 uP board halted when connect PC            01/01/70 00:00      
RE: 80c52 uP board halted when connect PC            01/01/70 00:00      
RE: 80c52 uP board halted when connect PC            01/01/70 00:00      
RE: 80c52 uP board halted when connect PC            01/01/70 00:00      
RE: 80c52 uP board halted when connect PC            01/01/70 00:00      
RE: 80c52 uP board halted when connect PC            01/01/70 00:00      
RE: 80c52 uP board halted when connect PC            01/01/70 00:00      
RE: 80c52 uP board halted when connect PC            01/01/70 00:00      
RE: /Rob            01/01/70 00:00      
RE: 80c52 uP board halted when connect PC            01/01/70 00:00      
RE: /Rob            01/01/70 00:00      
RE: /Rob            01/01/70 00:00      
RE: 80c52 uP board halted when connect PC            01/01/70 00:00      
RE: 80c52 uP board halted when connect PC            01/01/70 00:00      
RE: 80c52 uP board halted when connect PC            01/01/70 00:00      
RE: 80c52 uP board halted when connect PC            01/01/70 00:00      
RE: 80c52 uP board halted when connect PC            01/01/70 00:00      
RE: 80c52 uP board halted when connect PC            01/01/70 00:00      
RE: 80c52 uP board halted when connect P            01/01/70 00:00      

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