From: ibmmuseum@gmail.com   
      
   On Sunday, February 3, 2019 at 12:13:13 PM UTC-7, Louis Ohland wrote:   
   > https://datasheet.datasheetarchive.com/originals/distributors/   
   atasheets-22/DSA-423854.pdf    
   >    
   > Used on 16/4 adapters with the discrete pair of 53F2158 / A-B C30216    
   >    
   > [64D7274] This chip contains the output drivers and some "corporate    
   > logic", which was the 2 14-pin ICs on the elder version (ZM1 & ZM4).   
      
    Necrothread revivial - Part 1   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)