57 lines
1.7 KiB
C#
57 lines
1.7 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
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{
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/// <summary>
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/// The abstract class that all emulated models will inherit from
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/// * Port Access *
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/// </summary>
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public abstract partial class SpectrumBase
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{
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/// <summary>
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/// The last OUT data that was sent to the ULA
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/// </summary>
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protected byte LastULAOutByte;
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public byte LASTULAOutByte
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{
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get { return LastULAOutByte; }
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set { LastULAOutByte = value; }
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}
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/// <summary>
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/// Reads a byte of data from a specified port address
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/// </summary>
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/// <param name="port"></param>
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/// <returns></returns>
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public abstract byte ReadPort(ushort port);
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/// <summary>
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/// Writes a byte of data to a specified port address
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/// </summary>
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/// <param name="port"></param>
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/// <param name="value"></param>
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public abstract void WritePort(ushort port, byte value);
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/// <summary>
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/// Increments the CPU totalCycles counter by the tStates value specified
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/// </summary>
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/// <param name="tStates"></param>
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//public virtual void PortContention(int tStates)
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//{
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// CPU.TotalExecutedCycles += tStates;
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//}
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/// <summary>
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/// Simulates IO port contention based on the supplied address
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/// This method is for 48k and 128k/+2 machines only and should be overridden for other models
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/// </summary>
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/// <param name="addr"></param>
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public abstract void ContendPort(ushort addr);
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}
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}
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