From: tlake@twcny.rr.com   
      
   On Friday, July 13, 2018 at 7:22:35 AM UTC-4, lafos wrote:   
   > Zap 76 will enable the Radio Shack doubler.  If you don't have the zaps in   
   your manual, they are listed on Ira's site trs-80.com   
   >   
   >   
   > On Thursday, July 12, 2018 at 5:47:17 PM UTC-5, Thomas Lake wrote:   
   > > I have NEWDOS-80 2.0 is it possible to use it in double-density mode with   
   the Radio Shack double density controller? If so, HOW? The manual only   
   mentions Percom's double density controller which isn't compatible with the   
   Radio Shack unit.   
      
   Great! That's a big help. Thanks.   
      
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