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  BENCHMARK       : Differential Equation Solver

  Model Source    : P. G. Paulin, J. P. Knight, E. F. Girczyc:
                    "HAL: A multi-paradigm approach to automatic data path synthesis"
                    in Proc. 23rd IEEE Design Automation Conf, Las Vegas, NV, pp. 263-270,
                    July 1986.

  Testpattern Source : Rajesh Gupta, Stanford University , July 10 1990

  Developed on Aug 17 1992 by : Champaka Ramachandran
                                Univ. of Calif. , Irvine. 
                                champaka@balboa.eng.uci.edu

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THIS DIRECTORY HAS THE FOLLOWING FILES :

ROADMAP 	    :  This file explains the organization of files and 
		       directories in this benchmark example. It also
		       explains the steps to be followed when executing 
		       test vectors on the VHDL models. IT IS RECOMMENDED
		       THAT THIS FILE BE READ BEFORE PROCEEDING FURTHER.

diffeq.doc           :  This file contains a brief description of the differential
                        equation solver

test_vectors_DIFFEQ.vhdl: This file contains the VHDL (translated) test vectors
 		       for DIFFEQ. In order to simulate it on the Zycad 
                       ( Version 1.0a) simulator, the model is
		       instantiated in this file as a component. The test
		       vectors are statements inside a VHDL process.

test_vectors.doc    :  This is a documentation file on the test vectors,

cmd.inc             :  This is a command file used by the ZYCAD simulator 
                       ( Version 1.0a) while running the test vectors on any of
                       the models.
             

******************************************************************************

 RUNNING THE TEST VECTORS ON THE MODELS USING THE ZYCAD SIMULATOR:

******************************************************************************

 **** Running test_vectors on the whole chip ****

 For example, let us try to run the test vectors on the model contained in
 file "diffeq.vhdl". This is a model of the whole chip.

 (i) Compile the VHDL model file by typing 
          " zvan diffeq.vhdl"
 (ii) Compile the VHDL test-vectors file by typing 
          " zvan test_vectors_DIFFEQ.vhdl"
 (iii)  Run the simulation typing 
           " zvsim -t ns -i cmd.inc E".
         
 The simulation output will appear in a file called "run.out".
 If there are any errors in simulation, "Assert" statements 
 will appear in this file, mentioning the port at which the 
 error occurred and the expected value.





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