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   comp.lang.asm.x86      Ahh, the lost art of x86 assembly      4,675 messages   

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   Message 2,830 of 4,675   
   James Harris to wolfgang kern   
   Re: Look back to "just for the H@ck"   
   18 Jul 17 09:11:11   
   
   From: james.harris.1@nospicedham.gmail.com   
      
   On 18/07/2017 07:26, wolfgang kern wrote:   
   > Martin Str|mberg wrote:   
   > ...   
   >> So you decide the rules and tell and show us (if you want).   
   >   
   > Thanks, I thought real needs caused this restrictions.   
      
   As someone who has seen the various attempts at writing a decoder I am   
   not sure what the goal is. I get it that you have been producing code   
   which uses bytes in the ASCII printable character set but there are lots   
   of questions.   
      
   What is the basic requirement?   
      
   What are the initial conditions, i.e. what do you know about registers   
   at entry?   
      
   What's the minimum number of bytes you can count on before you might get   
   to a CR or CR/LF?   
      
   Can you overwrite the original text with the decoded version? If not,   
   what options can be used to get memory to decode into?   
      
   In addition, I could guess there might be problems with the location of   
   the decoded code. So I guess it is meant to be started at CS:0 or   
   CS:100. Am I anywhere close?   
      
      
   > So my rules for such an Base64 decoder would allow ASCII 33..127 and   
   > nothing less than 386 code.   
      
   You know you want to use 8086 code really.... :-)   
      
      
   --   
   James Harris   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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