public BaseAddressingModeTests()
{
addressingMode = new T();
cpuMemory = new CPUMemory();
cpuRegisters = new CPURegisters();
}
public byte Execute(OpCodeDefinition opCodeDefinition, IAddressingMode addressingMode, CPUMemory memory, CPURegisters registers, byte operand1, byte operand2)
{
var operationValue = memory.Stack.Span[++registers.SP];
registers.PS = (byte)((registers.PS & 0x30) | (operationValue & 0xCF));
return(opCodeDefinition.ExecutionCycles);
}
public byte Execute(OpCodeDefinition opCodeDefinition, IAddressingMode addressingMode, CPUMemory memory, CPURegisters registers, byte operand1, byte operand2)
{
var operationAddress = addressingMode.GetAddress(memory, registers, operand1, operand2, out bool pageBoundaryCrossed);
registers.PC = operationAddress;
return((byte)(opCodeDefinition.ExecutionCycles + (opCodeDefinition.AddExecutionCycleOnPageBoundaryCross && pageBoundaryCrossed ? 1 : 0)));
}
public byte Execute(OpCodeDefinition opCodeDefinition, IAddressingMode addressingMode, CPUMemory memory, CPURegisters registers, byte operand1, byte operand2)
{
var pcLow = (byte)(memory.Stack.Span[++registers.SP] + 1);
var pcHigh = memory.Stack.Span[++registers.SP];
registers.PC = (ushort)(pcLow | pcHigh << 0x08);
return(opCodeDefinition.ExecutionCycles);
}
public byte Execute(OpCodeDefinition opCodeDefinition, IAddressingMode addressingMode, CPUMemory memory, CPURegisters registers, byte operand1, byte operand2)
{
registers.N_NegativeFlag = (byte)((registers.X & 0x80) >> 7);
registers.Z_ZeroFlag = (byte)(registers.X == 0 ? 1 : 0);
registers.A = registers.X;
return(opCodeDefinition.ExecutionCycles);
}
public byte Execute(OpCodeDefinition opCodeDefinition, IAddressingMode addressingMode, CPUMemory memory, CPURegisters registers, byte operand1, byte operand2)
{
var operationValue = addressingMode.GetValue(memory, registers, operand1, operand2, out bool pageBoundaryCrossed);
registers.N_NegativeFlag = (byte)((operationValue & 0x80) >> 7);
registers.Z_ZeroFlag = (byte)(operationValue == 0 ? 1 : 0);
registers.X = operationValue;
return((byte)(opCodeDefinition.ExecutionCycles + (opCodeDefinition.AddExecutionCycleOnPageBoundaryCross && pageBoundaryCrossed ? 1 : 0)));
}
public byte Execute(OpCodeDefinition opCodeDefinition, IAddressingMode addressingMode, CPUMemory memory, CPURegisters registers, byte operand1, byte operand2)
{
var pageBoundaryCrossed = false;
if (opCodeDefinition.AddExecutionCycleOnPageBoundaryCross)
{
addressingMode.GetAddress(memory, registers, operand1, operand2, out pageBoundaryCrossed);
}
return((byte)(opCodeDefinition.ExecutionCycles + (opCodeDefinition.AddExecutionCycleOnPageBoundaryCross && pageBoundaryCrossed ? 1 : 0)));
}
public byte Execute(OpCodeDefinition opCodeDefinition, IAddressingMode addressingMode, CPUMemory memory, CPURegisters registers, byte operand1, byte operand2)
{
var operationValue = memory.Stack.Span[++registers.SP];
registers.N_NegativeFlag = (byte)((operationValue & 0x80) >> 7);
registers.Z_ZeroFlag = (byte)(operationValue == 0 ? 1 : 0);
registers.A = operationValue;
return(opCodeDefinition.ExecutionCycles);
}
public string GetSyntax(OpCodeDefinition opCodeDefinition, IAddressingMode addressingMode, CPUMemory memory, CPURegisters registers, byte operand1, byte operand2)
{
if (opCodeDefinition.AddressingMode == AddressingMode.IMM)
{
return(string.Empty);
}
else
{
var operationValue = addressingMode.GetValue(memory, registers, operand1, operand2, out _);
return($"= {operationValue:X02}");
}
}
public byte Execute(OpCodeDefinition opCodeDefinition, IAddressingMode addressingMode, CPUMemory memory, CPURegisters registers, byte operand1, byte operand2)
{
var operationAddress = addressingMode.GetAddress(memory, registers, operand1, operand2, out _);
var operationValue = addressingMode.GetValue(memory, registers, operationAddress);
var result = operationValue + 1;
registers.N_NegativeFlag = (byte)((result & 0x80) >> 7);
registers.Z_ZeroFlag = (byte)((byte)result == 0 ? 1 : 0);
addressingMode.SetValue(memory, registers, operationAddress, (byte)result);
return(opCodeDefinition.ExecutionCycles);
}
public byte Execute(OpCodeDefinition opCodeDefinition, IAddressingMode addressingMode, CPUMemory memory, CPURegisters registers, byte operand1, byte operand2)
{
var operationAddress = addressingMode.GetAddress(memory, registers, operand1, operand2, out bool pageBoundaryCrossed);
var operationValue = addressingMode.GetValue(memory, registers, operationAddress);
var result = operationValue << 1 | registers.C_CarryFlag;
registers.N_NegativeFlag = (byte)((result & 0x80) >> 7);
registers.C_CarryFlag = (byte)((operationValue & 0x80) >> 7);
registers.Z_ZeroFlag = (byte)((byte)result == 0x00 ? 1 : 0);
addressingMode.SetValue(memory, registers, operationAddress, (byte)result);
return((byte)(opCodeDefinition.ExecutionCycles + (opCodeDefinition.AddExecutionCycleOnPageBoundaryCross && pageBoundaryCrossed ? 1 : 0)));
}
public byte Execute(OpCodeDefinition opCodeDefinition, IAddressingMode addressingMode, CPUMemory memory, CPURegisters registers, byte operand1, byte operand2)
{
var operationAddress = addressingMode.GetAddress(memory, registers, operand1, operand2, out bool pageBoundaryCrossed);
var branchTaken = false;
if (registers.N_NegativeFlag == 0)
{
registers.PC = operationAddress;
branchTaken = true;
}
return((byte)(opCodeDefinition.ExecutionCycles + (opCodeDefinition.AddExecutionCycleOnPageBoundaryCross && pageBoundaryCrossed && branchTaken ? 1 : 0) + (branchTaken ? 1 : 0)));
}
public byte Execute(OpCodeDefinition opCodeDefinition, IAddressingMode addressingMode, CPUMemory memory, CPURegisters registers, byte operand1, byte operand2)
{
var operationValue = addressingMode.GetValue(memory, registers, operand1, operand2, out bool pageBoundaryCrossed);
var result = registers.A - operationValue - (1 - registers.C_CarryFlag);
registers.N_NegativeFlag = (byte)((result & 0x80) >> 7);
registers.Z_ZeroFlag = (byte)((byte)result == 0 ? 1 : 0);
registers.C_CarryFlag = (byte)(result >= 0x00 ? 1 : 0);
registers.V_OverflowFlag =
(byte)((result < 0x80 && registers.A >= 0x80) ||
(result >= 0x80 && registers.A < 0x80) ? 1 : 0);
registers.A = (byte)result;
return((byte)(opCodeDefinition.ExecutionCycles + (opCodeDefinition.AddExecutionCycleOnPageBoundaryCross && pageBoundaryCrossed ? 1 : 0)));
}
public BaseOperationTests()
{
operation = new T();
absoluteAddressingMode = new AbsoluteAddressingMode();
absoluteXAddressingMode = new AbsoluteXAddressingMode();
absoluteYAddressingMode = new AbsoluteYAddressingMode();
accumulatorAddressingMode = new AccumulatorAddressingMode();
immediateAddressingMode = new ImmediateAddressingMode();
impliedAddressingMode = new ImpliedAddressingMode();
indirectAddressingMode = new IndirectAddressingMode();
indirectXAddressingMode = new IndirectXAddressingMode();
indirectYAddressingMode = new IndirectYAddressingMode();
relativeAddressingMode = new RelativeAddressingMode();
zeroPageAddressingMode = new ZeroPageAddressingMode();
zeroPageXAddressingMode = new ZeroPageXAddressingMode();
zeroPageYAddressingMode = new ZeroPageYAddressingMode();
cpuMemory = new CPUMemory();
cpuRegisters = new CPURegisters();
}
public string GetSyntax(OpCodeDefinition opCodeDefinition, IAddressingMode addressingMode, CPUMemory memory, CPURegisters registers, byte operand1, byte operand2)
{
return(string.Empty);
}
private void InitializeOpCodeHandlers()
{
adcOperation = new ADCOperation();
andOperation = new ANDOperation();
aslOperation = new ASLOperation();
bccOperation = new BCCOperation();
bcsOperation = new BCSOperation();
beqOperation = new BEQOperation();
bitOperation = new BITOperation();
bmiOperation = new BMIOperation();
bneOperation = new BNEOperation();
bplOperation = new BPLOperation();
bvcOperation = new BVCOperation();
bvsOperation = new BVSOperation();
clcOperation = new CLCOperation();
cldOperation = new CLDOperation();
cliOperation = new CLIOperation();
clvOperation = new CLVOperation();
cmpOperation = new CMPOperation();
cpxOperation = new CPXOperation();
cpyOperation = new CPYOperation();
decOperation = new DECOperation();
dexOperation = new DEXOperation();
deyOperation = new DEYOperation();
eorOperation = new EOROperation();
incOperation = new INCOperation();
inxOperation = new INXOperation();
inyOperation = new INYOperation();
jmpOperation = new JMPOperation();
jsrOperation = new JSROperation();
laxOperation = new LAXOperation();
ldaOperation = new LDAOperation();
ldxOperation = new LDXOperation();
ldyOperation = new LDYOperation();
lsrOperation = new LSROperation();
nopOperation = new NOPOperation();
oraOperation = new ORAOperation();
phaOperation = new PHAOperation();
phpOperation = new PHPOperation();
plaOperation = new PLAOperation();
plpOperation = new PLPOperation();
rolOperation = new ROLOperation();
rorOperation = new ROROperation();
rtiOperation = new RTIOperation();
rtsOperation = new RTSOperation();
sbcOperation = new SBCOperation();
secOperation = new SECOperation();
sedOperation = new SEDOperation();
seiOperation = new SEIOperation();
staOperation = new STAOperation();
stxOperation = new STXOperation();
styOperation = new STYOperation();
taxOperation = new TAXOperation();
tayOperation = new TAYOperation();
tsxOperation = new TSXOperation();
txaOperation = new TXAOperation();
txsOperation = new TXSOperation();
tyaOperation = new TYAOperation();
noneAddressingMode = new NoneAddressingMode();
absoluteAddressingMode = new AbsoluteAddressingMode();
absoluteXAddressingMode = new AbsoluteXAddressingMode();
absoluteYAddressingMode = new AbsoluteYAddressingMode();
accumulatorAddressingMode = new AccumulatorAddressingMode();
immediateAddressingMode = new ImmediateAddressingMode();
impliedAddressingMode = new ImpliedAddressingMode();
indirectAddressingMode = new IndirectAddressingMode();
indirectXAddressingMode = new IndirectXAddressingMode();
indirectYAddressingMode = new IndirectYAddressingMode();
relativeAddressingMode = new RelativeAddressingMode();
zeroPageAddressingMode = new ZeroPageAddressingMode();
zeroPageXAddressingMode = new ZeroPageXAddressingMode();
zeroPageYAddressingMode = new ZeroPageYAddressingMode();
OpCodeDefinitions.OpCodeList.ForEach(x =>
{
OpCodeHandlers.Add(x.OpCode, new OpCodeHandler
{
OpCodeDefinition = x,
Operation = x.Nemonic switch
{
OpCode.ADC => adcOperation,
OpCode.AND => andOperation,
OpCode.ASL => aslOperation,
OpCode.BCC => bccOperation,
OpCode.BCS => bcsOperation,
OpCode.BEQ => beqOperation,
OpCode.BIT => bitOperation,
OpCode.BMI => bmiOperation,
OpCode.BNE => bneOperation,
OpCode.BPL => bplOperation,
//OpCode.BRK => throw new NotImplementedException(),
OpCode.BVC => bvcOperation,
OpCode.BVS => bvsOperation,
OpCode.CLC => clcOperation,
OpCode.CLD => cldOperation,
OpCode.CLI => cliOperation,
OpCode.CLV => clvOperation,
OpCode.CMP => cmpOperation,
OpCode.CPX => cpxOperation,
OpCode.CPY => cpyOperation,
OpCode.DEC => decOperation,
OpCode.DEX => dexOperation,
OpCode.DEY => deyOperation,
OpCode.EOR => eorOperation,
OpCode.INC => incOperation,
OpCode.INX => inxOperation,
OpCode.INY => inyOperation,
OpCode.JMP => jmpOperation,
OpCode.JSR => jsrOperation,
OpCode.LDA => ldaOperation,
OpCode.LDX => ldxOperation,
OpCode.LDY => ldyOperation,
OpCode.LSR => lsrOperation,
OpCode.NOP => nopOperation,
OpCode.ORA => oraOperation,
OpCode.PHA => phaOperation,
OpCode.PHP => phpOperation,
OpCode.PLA => plaOperation,
OpCode.PLP => plpOperation,
OpCode.ROL => rolOperation,
OpCode.ROR => rorOperation,
OpCode.RTI => rtiOperation,
OpCode.RTS => rtsOperation,
OpCode.SBC => sbcOperation,
OpCode.SEC => secOperation,
OpCode.SED => sedOperation,
OpCode.SEI => seiOperation,
OpCode.STA => staOperation,
OpCode.STX => stxOperation,
OpCode.STY => styOperation,
OpCode.TAX => taxOperation,
OpCode.TAY => tayOperation,
OpCode.TSX => tsxOperation,
OpCode.TXA => txaOperation,
OpCode.TXS => txsOperation,
OpCode.TYA => tyaOperation,
OpCode.LAX => laxOperation,
_ => nopOperation,
},
AddressingMode = x.AddressingMode switch
{
AddressingMode.NON => noneAddressingMode,
AddressingMode.ZP0 => zeroPageAddressingMode,
AddressingMode.ZPX => zeroPageXAddressingMode,
AddressingMode.ZPY => zeroPageYAddressingMode,
AddressingMode.ABS => absoluteAddressingMode,
AddressingMode.ABX => absoluteXAddressingMode,
AddressingMode.ABY => absoluteYAddressingMode,
AddressingMode.IND => indirectAddressingMode,
AddressingMode.IDX => indirectXAddressingMode,
AddressingMode.IDY => indirectYAddressingMode,
AddressingMode.IMP => impliedAddressingMode,
AddressingMode.ACC => accumulatorAddressingMode,
AddressingMode.IMM => immediateAddressingMode,
AddressingMode.REL => relativeAddressingMode,
_ => throw new NotImplementedException(),
}
});
public byte Execute(OpCodeDefinition opCodeDefinition, IAddressingMode addressingMode, CPUMemory memory, CPURegisters registers, byte operand1, byte operand2)
{
registers.C_CarryFlag = 0;
return(opCodeDefinition.ExecutionCycles);
}
public byte Execute(OpCodeDefinition opCodeDefinition, IAddressingMode addressingMode, CPUMemory memory, CPURegisters registers, byte operand1, byte operand2)
{
memory.Stack.Span[registers.SP--] = (byte)(registers.PS | (1 << 4) | (1 << 5));
return(opCodeDefinition.ExecutionCycles);
}
public byte Execute(OpCodeDefinition opCodeDefinition, IAddressingMode addressingMode, CPUMemory memory, CPURegisters registers, byte operand1, byte operand2)
{
registers.I_InterruptDisable = 1;
return(opCodeDefinition.ExecutionCycles);
}