From: muta...@gmail.com   
      
   On Tuesday, August 24, 2021 at 12:12:35 PM UTC+10, Joe Monk wrote:   
      
   > > Which allows a 1 MiB CSECT, right?   
   > >   
   > No it has nothing to do with that. 20-bit displacement   
   > allows for 512K prior to the base and 512K after the base.   
      
   Ok, maybe I'm thinking of the wrong thing. There are   
   relative addressing instructions introduced in S/390   
   compared to S/370. I basically know nothing about   
   them because all my knowledge is at S/370 or at   
   most S/370XA.   
      
   The reason I'm asking is because I'm trying to address   
   James's query - why aren't MVS load modules designed   
   to have a totally separate code section compared to   
   the data section?   
      
   Is it possible to do in S/390? I assume it is not possible   
   to do in S/370?   
      
   Thanks. Paul.   
      
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