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???
01/17/02 10:37
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#18822 - RE: A5h instruction on Oki 80C154???
Well, if you've disassembled it out of a shipped ECU, I certainly hope they're not breakpoints!

They might be using it as some sort of System "Trap" or "Software Interrupt" - eg, to interface to some sort of coprocessor?
You'd have to trace the execution & see what happens!

List of 12 messages in thread
TopicAuthorDate
A5h instruction on Oki 80C154???            01/01/70 00:00      
RE: A5h instruction on Oki 80C154???            01/01/70 00:00      
RE: A5h instruction on Oki 80C154???            01/01/70 00:00      
RE: A5h instruction on Oki 80C154???            01/01/70 00:00      
RE: A5h instruction on Oki 80C154???            01/01/70 00:00      
RE: A5h instruction on Oki 80C154???            01/01/70 00:00      
RE: A5h instruction on Oki 80C154???            01/01/70 00:00      
RE: A5h instruction on Oki 80C154???            01/01/70 00:00      
RE: A5h instruction on Oki 80C154???            01/01/70 00:00      
RE: A5h instruction on Oki 80C154???            01/01/70 00:00      
RE: A5h instruction on Oki 80C154???            01/01/70 00:00      
RE: A5h instruction on Oki 80C154???            01/01/70 00:00      

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