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???
12/09/03 02:02
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#60205 - RE: P89C51RD2 and P87C51SBBB
Responding to: ???'s previous message
I have had a similiar headache.

A perfectly normal code executing out of 89c51 failed to address any data in external memory when ported to 89c51rd2. Reason was that the EXTRAM bit in the AUXR special function register was not set !

Most times this "Works on one derivative and does not work on another derivative" may have an issue with SFRs. Hope you have checked out these.

Not saying that this could be the only reason.

Raghu

List of 22 messages in thread
TopicAuthorDate
P89C51RD2 and P87C51SBBB            01/01/70 00:00      
   RE: P89C51RD2 and P87C51SBBB            01/01/70 00:00      
      RE: P89C51RD2 and P87C51SBBB            01/01/70 00:00      
         RE: P89C51RD2 and P87C51SBBB            01/01/70 00:00      
            RE: P89C51RD2 and P87C51SBBB            01/01/70 00:00      
   RE: P89C51RD2 and P87C51SBBB            01/01/70 00:00      
      RE: P89C51RD2 and P87C51SBBB            01/01/70 00:00      
         RE: P89C51RD2 and P87C51SBBB            01/01/70 00:00      
            RE: P89C51RD2 and P87C51SBBB addendum            01/01/70 00:00      
            RE: P89C51RD2 and P87C51SBBB            01/01/70 00:00      
               RE: P89C51RD2 and P87C51SBBB            01/01/70 00:00      
   RE: a simple test            01/01/70 00:00      
      RE: a simple test            01/01/70 00:00      
         RE: a simple test            01/01/70 00:00      
            RE: a simple test            01/01/70 00:00      
               RE: a simple test            01/01/70 00:00      
   RE: P89C51RD2 and P87C51SBBB            01/01/70 00:00      
      RE: P89C51RD2 and P87C51SBBB            01/01/70 00:00      
      RE: P89C51RD2 and P87C51SBBB            01/01/70 00:00      
         Thanks Everybody = P89 X P87            01/01/70 00:00      
            RE: Thanks Everybody = P89 X P87            01/01/70 00:00      
               RE: Thanks Everybody = P89 X P87            01/01/70 00:00      

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