case 0x11:
		if ((StackPointer >= 1) && (StackPointer < MEMORY_SIZE)) {
			Memory[StackPointer] = Registers[REGISTER_A];
			StackPointer--;
		}
		break;

	case 0x21:
		Memory[StackPointer] = Flags;
		StackPointer--;
		break;

	case 0x31:
		if ((StackPointer >= 1) && (StackPointer < MEMORY_SIZE)) {
			Memory[StackPointer] = Registers[REGISTER_B];
			StackPointer--;
		}
		break;

	case 0x41:
		if ((StackPointer >= 1) && (StackPointer < MEMORY_SIZE)) {
			Memory[StackPointer] = Registers[REGISTER_C];
			StackPointer--;
		}
		break;

	case 0x51:
		if ((StackPointer >= 1) && (StackPointer < MEMORY_SIZE)) {
			Memory[StackPointer] = Registers[REGISTER_D];
			StackPointer--;
		}
		break;

	case 0x61:
		if ((StackPointer >= 1) && (StackPointer < MEMORY_SIZE)) {
			Memory[StackPointer] = Registers[REGISTER_E];
			StackPointer--;
		}
		break;

	case 0x71:
		if ((StackPointer >= 1) && (StackPointer < MEMORY_SIZE)) {
			Memory[StackPointer] = Registers[REGISTER_L];
			StackPointer--;
		}
		break;

	case 0x81:
		if ((StackPointer >= 1) && (StackPointer < MEMORY_SIZE)) {
			Memory[StackPointer] = Registers[REGISTER_H];
			StackPointer--;
		}
		break;