/// <summary>
/// OpCodeName = "LD",
/// Param1Type = AddressingMode.Indexed,
/// Param2Type = AddressingMode.Immediate,
/// Equation = "(IX+d) <- n",
/// Param1List = "(IX+d)","(IY+d)"
/// Param2List = "n"
/// UserManualPage = "90\n91",
/// Description = "The n operand is loaded to the memory address specified by the sum of the\nIndex Register IX and the two�s complement displacement operand d.",
/// ConditionBitsAffected = "None",
/// Example = "If the Index Register IX contains the number 219AH, the instruction\nLD (IX+5H), 5AH results in byte 5AH in the memory address 219FH."
/// </summary>
private void Instruction_71_LD_IndexedAddress_Number8(byte machineCycleCountAfterInstruction, byte halfTStateIndex)
{
// MachineCycleType.OCF, TStates = 4
// MachineCycleType.OD, TStates = 3
if (machineCycleCountAfterInstruction == 2 && halfTStateIndex == 5)
{
InternalDataBus_SendTo(InternalDataBusConnection.Z);
}
// MachineCycleType.OD, TStates = 5
if (machineCycleCountAfterInstruction == 3 && halfTStateIndex == 5)
{
InternalDataBus_SendTo(InternalDataBusConnection.ALURightBuffer);
}
if (machineCycleCountAfterInstruction == 3 && halfTStateIndex == 7)
{
InternalDataBus_SampleFrom(InternalDataBusConnection.Z);
}
if (machineCycleCountAfterInstruction == 3 && halfTStateIndex == 9)
{
InternalAddressBus_SampleFrom(RegisterUtils.GetFromAddressIndexBase((AddressIndexBase)instructionOrigin.OpCode.Param1));
InternalAddressBus_SendTo(InternalAddressBusConnection.WZ);
InternalAddressBus_SampleFromRegisterWZPlusDisplacement();
}
// MachineCycleType.MW, TStates = 3
if (machineCycleCountAfterInstruction == 4 && halfTStateIndex == 0)
{
InternalDataBus_SampleFrom(InternalDataBusConnection.ALURightBuffer);
}
}
/// <summary>
/// OpCodeName = "LD",
/// Param1Type = AddressingMode.Register,
/// Param2Type = AddressingMode.Indexed,
/// Equation = "r <- (IX+d)",
/// Param1List = new string[] { "A","B","C","D","E","H","L" },
/// Param2List = new string[] { "(IX+d)","(IY+d)" },
/// UserManualPage = "84\n85",
/// Description = "The operand (IX+d), (the contents of the Index Register IX summed with\na two�s complement displacement integer d) is loaded to register r, where r identifies register A, B, C, D, E, H, or L.",
/// ConditionBitsAffected = "None",
/// Example = "If the Index Register IX contains the number 25AFH, the instruction LD B,\n(IX+19H) causes the calculation of the sum 25AFH + 19H, which points\nto memory location 25C8H. If this address contains byte 39H, the\ninstruction results in register B also containing 39H."
/// </summary>
private void Instruction_63_LD_Register_IndexedAddress(byte machineCycleCountAfterInstruction, byte halfTStateIndex)
{
// MachineCycleType.OCF, TStates = 4
// MachineCycleType.OD, TStates = 3
// MachineCycleType.CPU, TStates = 5
if (machineCycleCountAfterInstruction == 3 && halfTStateIndex == 9)
{
InternalAddressBus_SampleFrom(RegisterUtils.GetFromAddressIndexBase((AddressIndexBase)instructionOrigin.OpCode.Param2));
InternalAddressBus_SendTo(InternalAddressBusConnection.WZ);
InternalAddressBus_SampleFromRegisterWZPlusDisplacement();
}
// MachineCycleType.MR, TStates = 3
if (machineCycleCountAfterInstruction == 4 && halfTStateIndex == 5)
{
InternalDataBus_SendTo((Register)instructionOrigin.OpCode.Param1);
}
}
/// <summary>
/// OpCodeName = "BIT",
/// Param1Type = AddressingMode.Bit,
/// Param2Type = AddressingMode.Indexed,
/// Equation = "Z <- (IX+d)b",
/// Param1List = "0","1","2","3","4","5","6","7"
/// Param2List = "(IX+d)","(IY+d)"
/// UserManualPage = "228\n230",
/// Description = "This instruction tests bit b in the memory location specified by the contents\nof register pair IX combined with the two's complement displacement d\nand sets the Z flag accordingly.",
/// ConditionBitsAffected = "S is unknown\nZ is set if specified Bit is 0, reset otherwise\nH is set\nP/V is unknown\nN is reset\nC is not affected",
/// Example = "If the contents of Index Register IX are 2000H, and bit 6 in memory\nlocation 2004H contains 1, at execution of BIT 6, (IX+4H) the Z flag in\nthe F register contains 0, and bit 6 in memory location 2004H still contains\n1. Bit 0 in memory location 2004H is the least-significant bit."
/// </summary>
private void Instruction_17_BIT_Bit_IndexedAddress(byte machineCycleCountAfterInstruction, byte halfTStateIndex)
{
// MachineCycleType.OCF, TStates = 4
// MachineCycleType.MR, TStates = 4
if (machineCycleCountAfterInstruction == 2 && halfTStateIndex == 0)
{
InternalDataBus_SampleFrom(InternalDataBusConnection.W);
InternalAddressBus_SampleFrom(RegisterUtils.GetFromAddressIndexBase((AddressIndexBase)instructionOrigin.OpCode.Param2));
InternalAddressBus_SendTo(InternalAddressBusConnection.WZ);
InternalAddressBus_SampleFromRegisterWZPlusDisplacement();
}
if (machineCycleCountAfterInstruction == 2 && halfTStateIndex == 5)
{
InternalDataBus_SendTo(InternalDataBusConnection.ALURightBuffer);
}
if (machineCycleCountAfterInstruction == 2 && halfTStateIndex == 7)
{
BitTest(BitUtils.ToByte((Bit)instructionOrigin.OpCode.Param1), AddressingMode.Indexed);
}
}
