/** write */
public void write(SequentialInstruction currentInstruction) {
switch (currentInstruction.getAddressingMode()) {
case Globals.IMMEDIATE_ADDRESSING:
outputTape.addElement(currentInstruction.getAddress());
break;
case Globals.INDIRECT_ADDRESSING:
outputTape.addElement(
memoryRegister.getRegister(
memoryRegister.getRegister(currentInstruction.getAddress())));
break;
case Globals.REFERENCE_ADDRESSING:
outputTape.addElement(memoryRegister.getRegister(currentInstruction.getAddress()));
break;
default:
break;
}
currentInstructionIndex++;
}
/** load */
public void load(SequentialInstruction currentInstruction) {
switch (currentInstruction.getAddressingMode()) {
case Globals.IMMEDIATE_ADDRESSING:
memoryRegister.setAccumulator(currentInstruction.getAddress());
break;
case Globals.INDIRECT_ADDRESSING:
memoryRegister.setAccumulator(
memoryRegister.getRegister(
memoryRegister.getRegister(currentInstruction.getAddress())));
break;
case Globals.REFERENCE_ADDRESSING:
memoryRegister.setAccumulator(memoryRegister.getRegister(currentInstruction.getAddress()));
break;
default:
break;
}
currentInstructionIndex++;
}
/** read */
public void read(SequentialInstruction currentInstruction) {
switch (currentInstruction.getAddressingMode()) {
case Globals.IMMEDIATE_ADDRESSING:
System.out.println(
"Error. Line: "
+ (currentInstructionIndex + 1)
+ "Invalid addressing: "
+ currentInstruction.getName()
+ " ="
+ currentInstruction.getAddress());
break;
case Globals.INDIRECT_ADDRESSING:
int aux =
memoryRegister.getRegister(currentInstruction.getAddress())
+ 1
- memoryRegister.getSize();
if (checkMemoryRegisterOverflow(
memoryRegister.getRegister(currentInstruction.getAddress()))) {
for (int i = 0; i < aux; i++) memoryRegister.addRegister(0);
}
memoryRegister.setRegister(
memoryRegister.getRegister(currentInstruction.getAddress()),
inputTape.getCurrentPointerElement());
inputTape.incrementPointer();
break;
case Globals.REFERENCE_ADDRESSING:
int aux2 = currentInstruction.getAddress() + 1 - memoryRegister.getSize();
if (checkMemoryRegisterOverflow(currentInstruction.getAddress())) {
for (int i = 0; i < aux2; i++) memoryRegister.addRegister(0);
}
memoryRegister.setRegister(
currentInstruction.getAddress(), inputTape.getCurrentPointerElement());
inputTape.incrementPointer();
break;
default:
break;
}
currentInstructionIndex++;
}