58 lines
1.7 KiB
C#
58 lines
1.7 KiB
C#
// <copyright file="InputOutput.cs" company="Adrian Conlon">
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// Copyright (c) Adrian Conlon. All rights reserved.
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// </copyright>
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namespace EightBit
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{
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using System;
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public sealed class InputOutput
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{
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private readonly byte[] input = new byte[0x100];
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private readonly byte[] output = new byte[0x100];
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public InputOutput()
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{
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}
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public event EventHandler<PortEventArgs>? ReadingPort;
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public event EventHandler<PortEventArgs>? ReadPort;
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public event EventHandler<PortEventArgs>? WritingPort;
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public event EventHandler<PortEventArgs>? WrittenPort;
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public byte Read(byte port) => this.ReadInputPort(port);
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public void Write(byte port, byte value) => this.WriteOutputPort(port, value);
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public byte ReadInputPort(byte port)
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{
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this.OnReadingPort(port);
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var value = this.input[port];
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this.OnReadPort(port);
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return value;
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}
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public void WriteInputPort(byte port, byte value) => this.input[port] = value;
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public byte ReadOutputPort(byte port) => this.output[port];
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public void WriteOutputPort(byte port, byte value)
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{
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this.OnWritingPort(port);
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this.output[port] = value;
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this.OnWrittenPort(port);
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}
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private void OnReadingPort(byte port) => this.ReadingPort?.Invoke(this, new PortEventArgs(port));
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private void OnReadPort(byte port) => this.ReadPort?.Invoke(this, new PortEventArgs(port));
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private void OnWritingPort(byte port) => this.WritingPort?.Invoke(this, new PortEventArgs(port));
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private void OnWrittenPort(byte port) => this.WrittenPort?.Invoke(this, new PortEventArgs(port));
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}
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}
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