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???
04/10/06 15:48
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#113979 - Mistake
Responding to: ???'s previous message
Sorry, made a mistake!

Markus said:
What does this mean? What happens with the high byte of the address? Is it set to 0?

The higher address byte isn't used. So, P2 port lines can be used for different tasks.
With this addressing methode only 256 bytes of external memory can be addressed.

Kai



List of 28 messages in thread
TopicAuthorDate
unclarity with movx instruction            01/01/70 00:00      
   Speed up            01/01/70 00:00      
      Mistake            01/01/70 00:00      
   Clarity prevails!            01/01/70 00:00      
      Quicker?            01/01/70 00:00      
         Quicker!            01/01/70 00:00      
            assumption...            01/01/70 00:00      
            Finally, you are right!            01/01/70 00:00      
   MOVX @Ri            01/01/70 00:00      
      since you did not have the time to find            01/01/70 00:00      
      wrong answer            01/01/70 00:00      
         Typo            01/01/70 00:00      
         thanks Erik for the correction            01/01/70 00:00      
   It is set to P0            01/01/70 00:00      
      wrong again            01/01/70 00:00      
         Yes I am            01/01/70 00:00      
   an example            01/01/70 00:00      
      Internal XRAM            01/01/70 00:00      
         not really            01/01/70 00:00      
            Ports' SFR are set to 1            01/01/70 00:00      
               not a port, a "page SFR"            01/01/70 00:00      
         P2?            01/01/70 00:00      
            Doh!            01/01/70 00:00      
   which derivative            01/01/70 00:00      
      do not allow?            01/01/70 00:00      
         AT89S8252            01/01/70 00:00      
            Aaaaah, so. Thanks.            01/01/70 00:00      
   Tanks            01/01/70 00:00      

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