issue with IAS machine instruction cycle simulator in C programming
hello everyone i've got this assignement where i have to demonstrate the fetch and instruction cycle of an IAS machine
Until now i've implemented the needed functions
but my issue is regarding the testing i don't how to test the program with files.....
it goes like follows:
Code:
long long int PC, MAR, MQ, AC, MBR[4], IBR[2], IR;
int verbose,instruction_line=1;
long long int instructions[65536][4];
long long int memory[65536];
int main(){
long long int /*beginingstatement,*/ index, operant, opcode, adress;
int i=1, j=0, m, n, counter=0;
char exe_mode;
FILE *inp;
if ( ( inp = fopen( "Input.txt", "r" ) ) == NULL ) {
printf( "File could not be opened\n" );
}
else {
while(index != 11000){
// fscanf(inp, "%x", &beginingstatement);
fscanf(inp, "%x%x", &index, &operant);
memory[index] = operant;
fscanf(inp, "%x%x", &index, &operant);
opcode = operant;
/* Reading the program and saving it at location M[1] */
while(!feof(inp)){
instructions[i][j] = opcode;
fscanf(inp, "%d", &adress);
instructions[i][j+1] = adress;
counter++;
fscanf(inp, "%x", &opcode);
if(feof(inp))
break;
else{
instructions[i][j+2] = opcode;
//printf("%X\n", instructions[i][j+2]);
fscanf(inp, "%d", &adress);
instructions[i][j+3] = adress;
counter++;
i++;
j=0;
fscanf(inp, "%x", &opcode);
}
}
printf("Execute Instruction in\n --Normal Mode(N)\n --Tracing Mode(T)\n-->");
scanf("%c", &exe_mode);
if(exe_mode == 'N')
verbose = 0;
else
verbose = 1;
PC = 1;
for(i=0; i<counter; i++){
if(verbose)
printf("==> fetch Instruction %d\n\n", i+1);
fetchNextInstruction();
execute_instruct();
}
printf("==> The final values of the registers:\n");
printf(" PC = %d\n", PC);
printf(" MAR = %d\n", MAR);
printf(" MBR = %X\n", MBR[1]);
printf(" IBR = ");
for(i=0; i<2; i++)
printf("%X ", IBR[i]);
printf("\n");
printf(" AC = %X\n", AC);
printf(" IR = %X\n", IR);
printf(" MQ = %X\n", MQ);
}
}
}
for a text file that is as follows :
10003
940 A
941 2
10001
1 940
5 941
how should the text file look like if considering how the program is supposed to show the cycles
