   This is something I wrote a few years ago in a fit of nostalgia, but
   never really quite got finished. It was intended to run as a login 
   shell on my new shiny sun, to discourage other users from taking my
   CPU cycles.

   It is an emulator for for favourite operating system, JCL on an IBM 360.
   It works as far as it goes, but I never got around to implementing 
   libraries (I was going to use "ar" via system() calls). The grammar 
   is a bit of a hack, with the lex analysis doing a good deal of the work.

   To try it out, type "JCL < deck" after running make. I don't really want
   to deal with any enhancements or bug fixes (although I'd be happy to
   see the code improved). I therefore bequeath this code to the net, with
   no strings attached. On the other hand, I doubt if there is much money
   to be made out of it.

   One thing that I intended to do, but never did, was to make JCL accept
   input produced by "bcd" (i.e. real card images). I have a programme 
   somewhere that's like bcd but writes paper tapes, if there were enough
   interest I could post it.

			
				Robert Lupton
