/* SPDX-License-Identifier: Unlicense
 */

#pragma once

#include "bus.hpp"

class IO {
public:
    constexpr IO(const uint32_t base_address_a): base_address(base_address_a) {}
    uint32_t Read(uint32_t offset, enum bitness);
    void Write(uint32_t offset, enum bitness, uint32_t value);
    const uint32_t base_address;
    constexpr static uint32_t kData1Offset = 0x3;
    constexpr static uint32_t kData2Offset = 0x5;
    constexpr static uint32_t kData3Offset = 0x7;
    constexpr static uint32_t kControl1Offset = 0x9;
    constexpr static uint32_t kControl2Offset = 0xb;
    constexpr static uint32_t kControl3Offset = 0xd;
    constexpr static uint32_t kTx1Offset = 0xf;
    constexpr static uint32_t kRx1Offset = 0x11;
    constexpr static uint32_t kStatus1Offset = 0x13;
    constexpr static uint32_t kTx2Offset = 0x15;
    constexpr static uint32_t kRx2Offset = 0x17;
    constexpr static uint32_t kStatus2Offset = 0x19;
    constexpr static uint32_t kTx3Offset = 0x1b;
    constexpr static uint32_t kRx3Offset = 0x1d;
    constexpr static uint32_t kStatus3Offset = 0x1f;
    constexpr static uint32_t kZ80BusReq = 0x1100;
    constexpr static uint32_t kZ80Reset = 0x1200;
private:
    uint32_t read(uint32_t offset);
    void write(uint32_t offset, uint8_t value);
    uint8_t _control1{}, _control2{}, _control3{};
    uint8_t _data1{}, _data2{}, _data3{};
    uint8_t _tx1{}, _rx1{}, _status1{};
    uint8_t _tx2{}, _rx2{}, _status2{};
    uint8_t _tx3{}, _rx3{}, _status3{};
    bool _z80_reset{};
    bool _z80_busreq{};
};