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   comp.sys.apple2      Discussion about Apple II micros      56,720 messages   

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   Message 56,307 of 56,720   
   David Schmidt to fadden   
   Re: Does AppleLink ACU still exist?   
   05 Sep 23 12:21:37   
   
   From: schmidtd@my-deja.com   
      
   On 9/5/23 10:51 AM, fadden wrote:   
   > [...]   
   > The format is straightforward, but my attempts to match the checksum   
   algorithm haven't been successful.  I was hoping to throw a few files with   
   known contents at it.  (It's using the standard CRC-16/XMODEM for the record   
   headers, but the computations    
   on the file data aren't coming out right.)   
      
   I'm sure a quick ChatGPT query will get you the polynomial.  If you want   
   to have some fun for yourself:   
   https://www.csse.canterbury.ac.nz/greg.ewing/essays/CRC-Reverse-   
   ngineering.html   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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