//
//  Z80AllRAM.cpp
//  Clock Signal
//
//  Created by Thomas Harte on 16/05/2017.
//  Copyright © 2017 Thomas Harte. All rights reserved.
//

#include "Z80AllRAM.hpp"
#include <algorithm>

using namespace CPU::Z80;

AllRAMProcessor::AllRAMProcessor() : ::CPU::AllRAMProcessor(65536), delegate_(nullptr) {}

int AllRAMProcessor::perform_machine_cycle(const MachineCycle &cycle) {
	uint16_t address = cycle.address ? *cycle.address : 0x0000;
	switch(cycle.operation) {
		case BusOperation::ReadOpcode:
//			printf("%04x %02x [BC=%02x]\n", *cycle->address, memory_[*cycle->address], get_value_of_register(CPU::Z80::Register::BC));
			check_address_for_trap(address);
		case BusOperation::Read:
//			printf("r %04x [%02x] AF:%04x BC:%04x DE:%04x HL:%04x SP:%04x\n", *cycle->address, memory_[*cycle->address], get_value_of_register(CPU::Z80::Register::AF), get_value_of_register(CPU::Z80::Register::BC), get_value_of_register(CPU::Z80::Register::DE), get_value_of_register(CPU::Z80::Register::HL), get_value_of_register(CPU::Z80::Register::StackPointer));
			*cycle.value = memory_[address];
		break;
		case BusOperation::Write:
//			printf("w %04x\n", *cycle->address);
			memory_[address] = *cycle.value;
		break;

		case BusOperation::Output:
		break;
		case BusOperation::Input:
			// This logic is selected specifically because it seems to match
			// the FUSE unit tests. It might need factoring out.
			*cycle.value = address >> 8;
		break;

		case BusOperation::Internal:
		break;

		default:
			printf("???\n");
		break;
	}
	timestamp_ += cycle.length;

	if(delegate_ != nullptr) {
		delegate_->z80_all_ram_processor_did_perform_bus_operation(*this, cycle.operation, address, cycle.value ? *cycle.value : 0x00, timestamp_);
	}

	return 0;
}