System Software:
Assemblers, Linkers, and Loaders

Program Development
  
    ·   Compiler:
       a)   Code generator: creates symbolic assembly or machine code.
       b)   Programming productivity is improved.

   ·    Assembler: 
        a)  Translates symbolic language source into machine code. (There is a
             one-to-one relationship between  symbols/labels and machine
             opcodes/addresses.)
        b)  Higher code optimization and mission critical code timing.

   ·    Interpreter:
        a)  Executes a source language program.
        b)  Poor performance (3x-20x) but replaces non-existent hardware.
        c)  Processes a source language program and executes the equivalent
             machine code.    Some compile to an intermediate format, p-codes ,
             then execute a  p-code engine
 


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