public static void processInstruction(int inst, int op, BufferedReader br) throws IOException {
switch (inst) {
case 1:
AC = op; // Load the value into the AC
// printSToScreen("1. Load the value into the AC...." + "AC: " + AC + " op: " + op);
break;
case 2:
AC = readFromMemory(op, br); // Load the value at addr into the AC
// printSToScreen("2. Load the value at addr into the AC...." + "AC: " + AC + "
// riidFromMemory(op,br): " + readFromMemory(op,br));
// printSToScreen("" + inst + ". ");
break;
case 3:
AC =
readFromMemory(
readFromMemory(op, br),
br); // Load the value from the address found in the given address into the AC (for
// example , if LoadInt 500, and 500 contains 100, then load from 100)
// printSToScreen("" + inst + ". ");
break;
case 4:
int address = op + x;
AC = readFromMemory(address, br); // Load the value at (address+X) into the AC
// printSToScreen("");
// printSToScreen("4. Load the value at address("+address+") + X("+x+") into the AC...." + "
// AC: " + AC + " ");
// printSToScreen("" + inst + ". ");
break;
case 5:
AC = readFromMemory(op + y, br); // Load the value at (address+Y) into the AC
// printSToScreen("5. Load the value at (address+Y) into the AC...." + "AC: " + AC + " op:
// " + op + " y: " + y);
break;
case 6:
AC = readFromMemory(SP + x, br); // Load from (Sp+X) into the AC
// printSToScreen("" + inst + ". ");
break;
case 7:
writeToMemory(AC, op); // Store the value in the AC into the address
// printSToScreen("" + inst + ". ");
break;
case 8: // Gets a random int from 1 to 100 into the AC
Random rand = new Random();
int randN = rand.nextInt(100) + 1;
AC = randN;
// printSToScreen("Loading to AC: " + AC);
// printSToScreen("" + inst + ". ");
break;
case 9:
if (op == 1) { // If port=1, writes AC as an int to the screen
// printSToScreen("op == 1, AC: " + AC);
printToScreen(AC);
} else if (op == 2) { // If port=2, writes AC as a char to the screen
printCToScreen((char) AC);
}
// printSToScreen("" + inst + ". ");
break;
case 10: // Add the value in to the AC
AC += x;
// printSToScreen("Add " + x + " in the X to AC: " + AC);
// printSToScreen("" + inst + ". ");
break;
case 11: // Add the value in Y to the AC
AC += y;
// printSToScreen("11. Add " + y + " in y to AC: " + AC);
// printSToScreen("" + inst + ". ");
break;
case 12: // Subtract the value in X from the AC
AC -= x;
// printSToScreen("" + inst + ". ");
break;
case 13: // SubY
AC -= y;
// printSToScreen("" + inst + ". ");
break;
case 14: // Copy the value in the AC to X
x = AC;
// printSToScreen("14. Copy the value in the AC to X...." + "AC: " + AC + " x: " + x);
// printSToScreen("" + inst + ". ");
break;
case 15: // Copy the value in X to the AC
AC = x;
// printSToScreen("" + inst + ". ");
break;
case 16: // Copy the value in the AC to Y
y = AC;
//// printSToScreen("Copy " + AC + " in the AC to y: " + y);
// printSToScreen("16. Copy the value in the AC to Y: AC: " + AC + " y: " + y);
break;
case 17: // Copy the value in Y to the AC
AC = y;
// printSToScreen("" + inst + ". ");
break;
case 18: // Copy the value in AC to the SP
SP = AC;
// printSToScreen("" + inst + ". ");
break;
case 19: // Copy the value in SP to the AC
AC = SP;
break;
case 20: // Jump to the address
PC = op - 1;
break;
case 21: // Jump to the address only if the value in the AC is zero
if (AC == 0) {
PC = op - 1;
}
// printSToScreen("21. Jump to the address only if the value in the AC is zero...." + "AC: "
// + AC + " hex: ");
break;
case 22: // JumpIfNotEqual addr
if (AC != 0) {
PC = op - 1;
}
break;
case 23: // Push return address onto stack, jump to the address
writeToMemory(PC, SP);
PC = PC - 1;
SP++;
break;
case 24: // Pop return address from the stack, jump to the address
int value = readFromMemory(SP, br);
SP--;
PC = value - 1;
break;
case 25: // Increment the value in X
x++;
// printSToScreen("25. incrementing x: " + x);
break;
case 26: // Decrement the value in X
x--;
break;
case 27: // Push AC onto stack
writeToMemory(AC, SP);
SP++;
break;
case 28: // Pop from stack into AC
AC = readFromMemory(SP, br);
SP--;
break;
case 29: // Set system mode, switch stack, push SP and PC, set new SP and PC
case 30: // Restore registers, set user mode
case 50: // End
System.out.println("end");
break;
}
// printSToScreen("");
}
