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???
09/20/07 13:18
Modified:
  09/20/07 13:19
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 		 #144821 - so much \'fun\' with ajmp
Responding to: ???'s previous message
within reach of the AJMPs (this is sometimes not so trivial to achieve).
i have had so much 'fun' with ajmp that I have virtually abandoned using it. for jump tables I use sjmp and 'crutches' as needed.
Save This Code
           mov   dptr,#PICejmp
           jmp   @a+dptr

PICejmp:   sjmp  code00
           sjmp  code08
           sjmp  code10
           sjmp  code18
           sjmp  code20
           sjmp  code28
           sjmp  code30
           sjmp  code38
           sjmp  code40
           sjmp  code48
           sjmp  code50
           sjmp  code58
           sjmp  code6070
           sjmp  code6878
           sjmp  code6070
           sjmp  code6878
           sjmp  code8090
           sjmp  code8898c
           sjmp  code8090
           sjmp  code8898c
           sjmp  codea0c
           sjmp  codea8c
           sjmp  codeb0c
           sjmp  codeb8c
           sjmp  codec0c8c
           sjmp  codec0c8c
           sjmp  coded0
           sjmp  coded8
           sjmp  codee0
           sjmp  codee8
           sjmp  codef0
           sjmp  codef8

; crutches
code8898c: ljmp  code8898
codea0c:   ljmp  codea0
codea8c:   ljmp  codea8
codeb0c:   ljmp  codeb0
codeb8c:   ljmp  codeb8
codec0c8c: ljmp  codec0c8
erik

PS Jan, as you like puzzles, tell me from which kind of routine this is extracted, I can think of only one.



List of 62 messages in thread
TopicAuthorDate
weekend survey            01/01/70 00:00      
   1. programming through the whole night            01/01/70 00:00      
   two things at once            01/01/70 00:00      
      not entirely correct            01/01/70 00:00      
   I'm afraid, but...            01/01/70 00:00      
      stealing codes?            01/01/70 00:00      
         A lesson learned by many            01/01/70 00:00      
         They are way faster...            01/01/70 00:00      
            sounds like a bitter experience            01/01/70 00:00      
   3)Math            01/01/70 00:00      
      0) Math            01/01/70 00:00      
   I have to agree with Erik            01/01/70 00:00      
   For hardware design(VHDL)            01/01/70 00:00      
      then, throw out the crap            01/01/70 00:00      
   Math, experience, tools and code libraries            01/01/70 00:00      
   Why?            01/01/70 00:00      
      tradeoffs            01/01/70 00:00      
         Well said, but not what I asked            01/01/70 00:00      
            different question            01/01/70 00:00      
               technique v tool            01/01/70 00:00      
      two reasons            01/01/70 00:00      
         valuation            01/01/70 00:00      
            that's a given, but            01/01/70 00:00      
            Lookup tables are good for lots of stuff            01/01/70 00:00      
   Good topic!            01/01/70 00:00      
      common tool, but            01/01/70 00:00      
         Function Pointers on the 8051            01/01/70 00:00      
            table-driven whatever and function pointers            01/01/70 00:00      
               reduce a task to its basic elements            01/01/70 00:00      
                  Good idea, bad example            01/01/70 00:00      
                     I didn't really want to use 805x instructions            01/01/70 00:00      
                        I can\'t find my old, (t)rusty 65C02 cheatsheet...            01/01/70 00:00      
                           Only the Rockwell version had it            01/01/70 00:00      
                              Oh, mea culpa...            01/01/70 00:00      
                        A very simple example would be helpful            01/01/70 00:00      
                           let\\\'s start at your end            01/01/70 00:00      
                              Here's what's confusing            01/01/70 00:00      
                                 FAQ?            01/01/70 00:00      
                                 Yes, you're quite right ... ... Mea culpa            01/01/70 00:00      
                  inconsistent instruction set            01/01/70 00:00      
                     I ask you, seriously, to inform us            01/01/70 00:00      
                        a few things            01/01/70 00:00      
                           so much \'fun\' with ajmp            01/01/70 00:00      
                              I give up            01/01/70 00:00      
                                 the answer            01/01/70 00:00      
                           My intuition            01/01/70 00:00      
                              mhm            01/01/70 00:00      
      to russ            01/01/70 00:00      
         to erik            01/01/70 00:00      
            to Russ            01/01/70 00:00      
               to Erik            01/01/70 00:00      
               To Erik            01/01/70 00:00      
                  WOW, a companion CD            01/01/70 00:00      
   the bad ideas            01/01/70 00:00      
      Anachronism?            01/01/70 00:00      
         he's certainly not a HW guy...            01/01/70 00:00      
      Hardware protection slated            01/01/70 00:00      
         this is an academic view...            01/01/70 00:00      
            Proving correctness            01/01/70 00:00      
   Why state machine / lookup tables?            01/01/70 00:00      
      Not to disagree ... but ...            01/01/70 00:00      
         A good reference            01/01/70 00:00      

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