ftp.nice.ch/pub/next/developer/resources/classes/CompSim.s.tar.gz#/CompSim/Decrementor.m

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//
// Decrementor
//
// An Objective-C class for the simulation of digital logic.
// 
// Decrementor very simply decrements its n-bit input and
// puts the result on its n-bit output.
//


#import "Decrementor.h"


@implementation Decrementor


- initNumBits:(int)nbits in:innode out:outnode
{
    [super init];
    
    numbits = nbits;
    
    INITDEVTYPE("Decrementor");
    
    TESTNODE("IN", innode, numbits);
    TESTNODE("OUT", outnode, numbits);
    
    IN = innode;
    OUT = outnode;
    
    negone = [[Node alloc] initNumBits:numbits fill:1];		// Negative one.
    foo = [[Node alloc] initNumBits:1];
    
    adder = [[Adder alloc] initNumBits:numbits a:IN b:negone cin:foo cout:foo out:OUT];
    
    return self;
}


- free
{
    [negone free];
    [foo free];
    [adder free];
    
    return [super free];
}


- cycle
{
    [adder cycle];
    
    return self;
}


@end


//
// End of file.
//

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