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int pc, ac, sp, ir, tir, zero, add1, sub1, Amask, Bmask;
int A, B, C, D, E, F;
int Alatch, Blatch, MAR, MBR;
int AMUX, ALU, shifter, Abus, Bbus, Cbus;
int addressOut, data_in, data_out;
int address;
int m[4095];
char inst[4];
int c = 0;
void LODD (int address)
{
ac=m[address];
}
void LOCO (int address)
{
if(0<=address&&address<=4095)
ac=address;
}
void LODL (int address)
{
ac=m[sp+address];
}
void STOD (int address)
{
m[address]=ac;
}
void SUBD (int address)
{
ac=ac-m[address];
}
void STOL (int address)
{
m[address+sp]=ac;
}
void SUBL (int address)
{
ac=ac-m[sp-address];
}
void SWAP (int address)
{
int tmp;
tmp=ac;
ac=sp;
sp=tmp;
}
void STOP (int address)
{
cout <<"The sum of three numbers is : "<< m[1004];
exit (0);
}
void ADDD (int address)
{
ac=ac+m[address];
}
void ADDL (int address)
{
ac=ac+m[sp+address];
}
void JPOS (int address)
{
if(ac>=0)
pc=address;
}
void JZER (int address)
{
if(ac=0)
pc=address;
}
void JUMP (int address)
{
pc=address;
}
void JNEG (int address)
{
if(ac<0)
pc=address;
}
void JNZE (int address)
{
if(ac!=0)
pc=address;
}
void PSHI (int address)
{
sp=sp-1;
m[sp]=m[ac];
}
void I (int address)
{
m[ac]=m[sp];
sp=sp+1;
}
void PUSH (int address)
{
sp=sp-1;
m[sp]=ac;
}
void POP (int address)
{
ac=m[sp];
sp=sp+1;
}
void CALL (int address)
{
sp=sp-1;
m[sp]=pc;
pc=address;
}
void RETN (int address)
{
pc=m[sp];
sp=sp+1;
}
void INSP (int address)
{
if(0<=address&&address<=255)
sp=sp+address;
}
void DESP (int address)
{
if(0<=address&&address<=255)
sp=sp-address;
}
int main()
{
ifstream fin;
ofstream fout;
//open input file
fin.open("Instructions.txt");
assert (!fin.fail());
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