 Buffer selection          Deselect
  Numbers 1..9 on main kbd    0

                         
                          Z  X  C  V  
                                      
                          
                           ^   ^   ^   ^
                  
   Q  W  E  R                   Cancel current operation
                 B:          Report last message (not in 35cacheb)
             Report progress of current operation (")
    A  S  D  F         Free buffer
                  A:
    
      ^   ^   ^   ^
               
                Write whole memory image onto floppy
             Write chaged parts of memory image onto floppy
          Assign buffer to drive
       Read buffer from drive
