On Thu,
23 Aug 2012, Mike Loewen wrote: 
    While I like the Kaypros, I prefer my TRS-80
Model 4 as a CP/M system.
 Back in the day, I ran Montezuma Micro CP/M 2.2 on this system and with
 its second bank of 64KB available as a RAMdisk, it was quite snappy.  MM
 also had the capability of defining virtual drives as other CP/M formats,
 so you could have, for example, a D: drive set up as a Kaypro or Osborne
 format.
  
 The only issue I have with the Model 4 (I've got one as well) is the lack
 of { and } keys.  Makes it damn difficult to write C code. :)  (but that
 just makes Turbo Pascal 3 even more attractive!) 
 
   Not a problem - CTRL-< and CTRL-> give you the curly braces.