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???
02/15/08 15:21
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 		 #150874 - no need to put constant into dptr
Responding to: ???'s previous message
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   mov    dph,a   ;instead of push - sparing stack space and a bit of code/speed too
   mov    a,vecr
   add    a,#LOW(positionx)
   mov    dpl,a
   clr    a
   addc   a,#HIGH(positionx)
   xch    a,dph  ;this restores acc, too
   movx   @dptr,a


(btw. Stefan, you can't push a / pop a - see FAQ on the left)

JW

List of 15 messages in thread
TopicAuthorDate
Need help with RAM access via 8051            01/01/70 00:00      
   re            01/01/70 00:00      
      RE:            01/01/70 00:00      
      no need to put constant into dptr            01/01/70 00:00      
         How can I get the low and high parts?            01/01/70 00:00      
            what '51 assembler do you use?            01/01/70 00:00      
         push/pop A            01/01/70 00:00      
            In my asm push ACC works!            01/01/70 00:00      
               Another question:            01/01/70 00:00      
                  options:            01/01/70 00:00      
                     By inc I mean increase the value in RAM by 1            01/01/70 00:00      
                        once DPTR points to that value...            01/01/70 00:00      
            this is why it's dangerous...            01/01/70 00:00      
         You can push/pop [direct] though.            01/01/70 00:00      
            this is certainly correct...            01/01/70 00:00      

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