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???
01/30/05 19:58
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 		 #86139 - Accessing the CODE area
Responding to: ???'s previous message
If you have constant data into the CODE area you must then use the MOVC instruction type to read the data.

If you have the external CODE and XDATA areas overlaid by having the /PSEN and /RD signals OR'ed and using the result of this logic function to read out the external memory then you use the MOVX or the MOVC instructions to read the memory and MOVX to write the memory (if it is a RAM type space).

Michael Karas


List of 36 messages in thread
TopicAuthorDate
memory in keil-help            01/01/70 00:00      
   all the info, please            01/01/70 00:00      
   Back to Basics            01/01/70 00:00      
      is it in evaluation            01/01/70 00:00      
         what is a Keil memory window?            01/01/70 00:00      
         Is the right data in memory.            01/01/70 00:00      
            memory data is correct            01/01/70 00:00      
               please explain            01/01/70 00:00      
                  it's not linking            01/01/70 00:00      
   which is it            01/01/70 00:00      
      I got it - its in X-segment            01/01/70 00:00      
         Loading XDATA into Keil simulator            01/01/70 00:00      
         Read the Bible            01/01/70 00:00      
            Understanding Logic Correctly.            01/01/70 00:00      
               My post            01/01/70 00:00      
                  Wrong thing need to be corrected            01/01/70 00:00      
               or - and            01/01/70 00:00      
            i need help in keil            01/01/70 00:00      
               Are coding in C?            01/01/70 00:00      
                  To be precise...            01/01/70 00:00      
            CDATA LOADING-------NOT OFFENSE            01/01/70 00:00      
               Accessing the CODE area            01/01/70 00:00      
                  Your request is not clear            01/01/70 00:00      
                     Your request is not clear            01/01/70 00:00      
   explanation----problem            01/01/70 00:00      
      WHY            01/01/70 00:00      
         because more memory            01/01/70 00:00      
            still confoosing            01/01/70 00:00      
            Won't fit in CODE space?            01/01/70 00:00      
      OK            01/01/70 00:00      
         RAM, ROM, CODE, XDATA            01/01/70 00:00      
         XCONST - no need for separate Project            01/01/70 00:00      
            I learned Something New            01/01/70 00:00      
   constant delay-----problem            01/01/70 00:00      
      New Thread?            01/01/70 00:00      
      In the new thread            01/01/70 00:00      

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