From: ibmmuseum@gmail.com   
      
   > Hm, but why? :D   
      
   '64D7274' is a typo (now discovered after close to 25 years later), with a 'D'   
   instead of a '0'; This error has replicated into the component list of the   
   16F1144 16/4 microchannel adapter (but not the initial "Long" 4Mbps Token-Ring   
   adapter that also    
   uses it). Peter's statement that the microchannel Token-Ring adapter(s) using   
   the 6407274 "CHEX" chip are later revisions is incorrect; To wit, it is on the   
   first 8-bit 4Mbps Token-Ring adapters, the first microchannel 4Mbps Token-Ring   
   adapter, the first    
   8-bit 16/4 Token-Ring adapter, and likely the first 16/4 microchannel   
   Token-Ring adapter (this discussion). The alternative that was on later   
   Token-Ring adapters was a pair of 53F2158 (Louis posted a separate follow-up   
   to this post in 2019, which I also    
   revived).   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)