From fccfe0e0b4848fa38403b515d77b6aba37570e54 Mon Sep 17 00:00:00 2001
From: Oxore <oxore@protonmail.com>
Date: Sat, 10 Jun 2023 13:26:58 +0300
Subject: Impl IO class with tracing, add VDP addr regs tracing

---
 io.hpp | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 io.hpp

(limited to 'io.hpp')

diff --git a/io.hpp b/io.hpp
new file mode 100644
index 0000000..de2478a
--- /dev/null
+++ b/io.hpp
@@ -0,0 +1,41 @@
+/* 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{};
+};
-- 
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