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ZXHawk: added CPUMonitor syncstate

This commit is contained in:
Asnivor 2018-06-06 15:37:29 +01:00
parent 7f8084d410
commit c80f873adf
1 changed files with 99 additions and 93 deletions
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192
BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Machine/CPUMonitor.cs
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@ -1,4 +1,5 @@
using BizHawk.Emulation.Cores.Components.Z80A;
using BizHawk.Common;
using BizHawk.Emulation.Cores.Components.Z80A;
using System;
using System.Collections.Generic;
using System.Linq;
@ -19,19 +20,17 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
#region Lookups
public ushort[] cur_instr => _cpu.cur_instr;
public int instr_pntr => _cpu.instr_pntr;
public ushort RegPC => _cpu.RegPC;
/// <summary>
/// CPU total executes t-states
/// </summary>
public long TotalExecutedCycles => _cpu.TotalExecutedCycles;
/// <summary>
/// Current BUSRQ line array
/// </summary>
public ushort BUSRQ
{
get
{
//if (_cpu.bus_pntr < _cpu.BUSRQ.Length - 1)
return _cpu.BUSRQ[_cpu.bus_pntr];
//return 0;
}
get { return _cpu.BUSRQ[_cpu.bus_pntr]; }
}
#endregion
@ -48,18 +47,15 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
#region State
public bool IsContending = false;
public int ContCounter = -1;
public int portContCounter = 0;
public int portContTotalLen = 0;
public bool portContending = false;
/// <summary>
/// The last 16-bit port address that was detected
/// </summary>
public ushort lastPortAddr;
public int[] portContArr = new int[4];
#endregion
#region Methods
/// <summary>
/// Handles the ULA and CPU cycle clocks, along with any memory and port contention
/// </summary>
@ -89,7 +85,7 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
}
/// <summary>
/// Looks up the BUSRQ address that is about to be signalled
/// Looks up the current BUSRQ address that is about to be signalled on the upcoming cycle
/// </summary>
/// <returns></returns>
private ushort AscertainBUSRQAddress()
@ -156,6 +152,79 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
return addr;
}
/// <summary>
/// Running every cycle, this determines whether the upcoming BUSRQ is for an IO operation
/// Also processes any contention
/// </summary>
/// <returns></returns>
private bool CheckIO()
{
bool isIO = false;
switch (BUSRQ)
{
// BC: T1
case Z80A.BIO1:
lastPortAddr = AscertainBUSRQAddress();
isIO = true;
if (IsIOCycleContended(1))
_cpu.TotalExecutedCycles += _machine.ULADevice.GetPortContentionValue((int)_machine.CurrentFrameCycle);
break;
// BC: T2
case Z80A.BIO2:
lastPortAddr = AscertainBUSRQAddress();
isIO = true;
if (IsIOCycleContended(2))
_cpu.TotalExecutedCycles += _machine.ULADevice.GetPortContentionValue((int)_machine.CurrentFrameCycle);
break;
// BC: T3
case Z80A.BIO3:
lastPortAddr = AscertainBUSRQAddress();
isIO = true;
if (IsIOCycleContended(3))
_cpu.TotalExecutedCycles += _machine.ULADevice.GetPortContentionValue((int)_machine.CurrentFrameCycle);
break;
// BC: T4
case Z80A.BIO4:
lastPortAddr = AscertainBUSRQAddress();
isIO = true;
if (IsIOCycleContended(4))
_cpu.TotalExecutedCycles += _machine.ULADevice.GetPortContentionValue((int)_machine.CurrentFrameCycle);
break;
// WZ: T1
case Z80A.WIO1:
lastPortAddr = AscertainBUSRQAddress();
isIO = true;
if (IsIOCycleContended(1))
_cpu.TotalExecutedCycles += _machine.ULADevice.GetPortContentionValue((int)_machine.CurrentFrameCycle);
break;
// WZ: T2
case Z80A.WIO2:
lastPortAddr = AscertainBUSRQAddress();
isIO = true;
if (IsIOCycleContended(2))
_cpu.TotalExecutedCycles += _machine.ULADevice.GetPortContentionValue((int)_machine.CurrentFrameCycle);
break;
// WZ: T3
case Z80A.WIO3:
lastPortAddr = AscertainBUSRQAddress();
isIO = true;
if (IsIOCycleContended(3))
_cpu.TotalExecutedCycles += _machine.ULADevice.GetPortContentionValue((int)_machine.CurrentFrameCycle);
break;
// WZ: T4
case Z80A.WIO4:
lastPortAddr = AscertainBUSRQAddress();
isIO = true;
if (IsIOCycleContended(4))
_cpu.TotalExecutedCycles += _machine.ULADevice.GetPortContentionValue((int)_machine.CurrentFrameCycle);
break;
}
return isIO;
}
/// <summary>
/// Returns TRUE if the supplied T-cycle within an IO operation has the possibility of being contended
/// This can be different based on the emulated ZX Spectrum model
@ -236,80 +305,7 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
}
return false;
}
/// <summary>
/// Running every cycle, this determines whether the upcoming BUSRQ is for an IO operation
/// Also processes any contention
/// </summary>
/// <returns></returns>
private bool CheckIO()
{
bool isIO = false;
switch (BUSRQ)
{
// BC: T1
case Z80A.BIO1:
lastPortAddr = AscertainBUSRQAddress();
isIO = true;
if (IsIOCycleContended(1))
_cpu.TotalExecutedCycles += _machine.ULADevice.GetPortContentionValue((int)_machine.CurrentFrameCycle);
break;
// BC: T2
case Z80A.BIO2:
lastPortAddr = AscertainBUSRQAddress();
isIO = true;
if (IsIOCycleContended(2))
_cpu.TotalExecutedCycles += _machine.ULADevice.GetPortContentionValue((int)_machine.CurrentFrameCycle);
break;
// BC: T3
case Z80A.BIO3:
lastPortAddr = AscertainBUSRQAddress();
isIO = true;
if (IsIOCycleContended(3))
_cpu.TotalExecutedCycles += _machine.ULADevice.GetPortContentionValue((int)_machine.CurrentFrameCycle);
break;
// BC: T4
case Z80A.BIO4:
lastPortAddr = AscertainBUSRQAddress();
isIO = true;
if (IsIOCycleContended(4))
_cpu.TotalExecutedCycles += _machine.ULADevice.GetPortContentionValue((int)_machine.CurrentFrameCycle);
break;
// WZ: T1
case Z80A.WIO1:
lastPortAddr = AscertainBUSRQAddress();
isIO = true;
if (IsIOCycleContended(1))
_cpu.TotalExecutedCycles += _machine.ULADevice.GetPortContentionValue((int)_machine.CurrentFrameCycle);
break;
// WZ: T2
case Z80A.WIO2:
lastPortAddr = AscertainBUSRQAddress();
isIO = true;
if (IsIOCycleContended(2))
_cpu.TotalExecutedCycles += _machine.ULADevice.GetPortContentionValue((int)_machine.CurrentFrameCycle);
break;
// WZ: T3
case Z80A.WIO3:
lastPortAddr = AscertainBUSRQAddress();
isIO = true;
if (IsIOCycleContended(3))
_cpu.TotalExecutedCycles += _machine.ULADevice.GetPortContentionValue((int)_machine.CurrentFrameCycle);
break;
// WZ: T4
case Z80A.WIO4:
lastPortAddr = AscertainBUSRQAddress();
isIO = true;
if (IsIOCycleContended(4))
_cpu.TotalExecutedCycles += _machine.ULADevice.GetPortContentionValue((int)_machine.CurrentFrameCycle);
break;
}
return isIO;
}
}
/// <summary>
/// Called when the first byte of an instruction is fetched
@ -323,5 +319,15 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
#endregion
#region Serialization
public void SyncState(Serializer ser)
{
ser.BeginSection("CPUMonitor");
ser.Sync("", ref lastPortAddr);
ser.EndSection();
}
#endregion
}
}