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???
04/16/10 05:42
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#175084 - (back to) basics - "bible" time
Responding to: ???'s previous message
Hal Albach said:
As Jan was trying to tell you, you are trying to DIRECTLY access ram that can only be accessed INDIRECTLY.


Maarten Brock said:
You can only use R0 and R1 for indirect addressing.

http://www.8052.com/forum/read/175044


These are basic issues with the 8051 architecture. It looks like you need to take some to study the so-called "bible" for the 8051 to get a thorough foundation in how the architecture works.
Links here: http://www.8052.com/faqs/120112

There are also tutorials here: http://www.8052.com/tutorial

List of 12 messages in thread
TopicAuthorDate
Problem with succesive memory locations            01/01/70 00:00      
   Debugging            01/01/70 00:00      
      How can i see the code of pressed key            01/01/70 00:00      
         Turn them into ASCII            01/01/70 00:00      
         Or use 2 characters            01/01/70 00:00      
   direct access to >80h => SFR            01/01/70 00:00      
   incorrect addressing method            01/01/70 00:00      
      (back to) basics - "bible" time            01/01/70 00:00      
      Hal Albach's way            01/01/70 00:00      
         It works            01/01/70 00:00      
         You are not showing enough            01/01/70 00:00      
   the danger of uniformity            01/01/70 00:00      

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