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???
07/11/07 12:22
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 		 #141743 - Because
Responding to: ???'s previous message
Jan Waclawek said:

But, then, the unused space can be filled by ANY character - this depends on the device programmer ("burner") software and the programmer's attitude (indeed, in one product, I deliberately filled the unused space with garbage, to deter potential intruders; even better would be to fill it with real program sequences... :-) ).



How can you fill the garbage value.Any value from 00 to FF is opcode.Other than this values are not possible.

And for many "Why" I am doing this is because I want to make my own programmer.Yes many programmers are available in market.Using them will not benifit me.I have written a code nearly about 12KB.During programming when an opcode is enterd the whole mnemonic is displayed on LCD.Same is done when reading previously programmed MCU (if not locked).The code which I have written is having certain limitation.I would like to reveal it to you ,Sir.so that I can find my way out.
Thanks for reading.



List of 53 messages in thread
TopicAuthorDate
Data or Instruction            01/01/70 00:00      
   Context            01/01/70 00:00      
   It does not and it cannot.            01/01/70 00:00      
      Solution            01/01/70 00:00      
         disassembler            01/01/70 00:00      
         have fun            01/01/70 00:00      
            Erase error            01/01/70 00:00      
               yes            01/01/70 00:00      
                  Certain Error            01/01/70 00:00      
                     Why?            01/01/70 00:00      
                     why?            01/01/70 00:00      
                        Why!            01/01/70 00:00      
                        Because            01/01/70 00:00      
                           what I meant by garbage...            01/01/70 00:00      
                           A single byte isn't garbage.            01/01/70 00:00      
                           D52 is open-source, isn\'t it?            01/01/70 00:00      
                              Concept of Pocket Programmer            01/01/70 00:00      
                                 well, if not            01/01/70 00:00      
                                 hummmmm....            01/01/70 00:00      
               Strictly speaking...            01/01/70 00:00      
                  @Erik            01/01/70 00:00      
                     that, in my opinion, is crazy            01/01/70 00:00      
                        It is crazy            01/01/70 00:00      
                           Eh??            01/01/70 00:00      
                              Computer here is PC (personal computer)            01/01/70 00:00      
                                 So what is the microcontroller?            01/01/70 00:00      
                        this depends on definition of "computer"...            01/01/70 00:00      
                        Here we go again ...            01/01/70 00:00      
                           beginner\'s guide to D52            01/01/70 00:00      
                           There you go again!            01/01/70 00:00      
                              Andy            01/01/70 00:00      
                                 There's always tomorrow...            01/01/70 00:00      
                                    Different application            01/01/70 00:00      
                                       Code re-use            01/01/70 00:00      
                                          the no-tool approach            01/01/70 00:00      
                                             Cell phone ?            01/01/70 00:00      
                                                PDA cellphone            01/01/70 00:00      
                                                I don't think that would be necessary...            01/01/70 00:00      
                                          Near to Cell phone            01/01/70 00:00      
                                       There are multiple ways in which to use the code            01/01/70 00:00      
                                       Still primitive            01/01/70 00:00      
                                          Good for you!            01/01/70 00:00      
                                             for displaying just 2 lines of 16 characters...            01/01/70 00:00      
                              What I mean is ...            01/01/70 00:00      
                                 Nobody did that?            01/01/70 00:00      
                                    Where you sit determines what you see            01/01/70 00:00      
                           more appropriate solutions?            01/01/70 00:00      
                              sometimes it's necessary to point out the obvious            01/01/70 00:00      
                              Another one:            01/01/70 00:00      
   It worked            01/01/70 00:00      
      Oooooh....            01/01/70 00:00      
         Sure            01/01/70 00:00      
            have a look at this!            01/01/70 00:00      

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