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???
01/30/05 02:42
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 		 #86116 - Read the Bible
Responding to: ???'s previous message
What are yu tring to do? The 8051 has a Harvard Architeture.

Code goes into CDATA External RAM is XDATA.
Code is read only. xdata usually does not get a ROM.
If you are tring to get constant data from a ROM put it in code space.
If you have filled the code space and want the constants in xdata put the ROM there.

If you want both together you need to NAND PSEN and RD.
If you have room in code but want to modify the data. them code the data for code to ram.

Your call.


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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