public void ExecuteJumpReturn(byte instruction, AddressModes addressMode, int signature)
{
RegisterBankNumber fakeBank = new RegisterBankNumber
{
Value = cpu.PC >> 16
};
int addr = GetAddress(addressMode, signature, fakeBank);
switch (instruction)
{
case OpcodeList.JSR_Absolute:
case OpcodeList.JSR_AbsoluteIndexedIndirectWithX:
cpu.Push(cpu.PC - 1, 2);
cpu.JumpLong(addr);
return;
case OpcodeList.JSR_AbsoluteLong:
cpu.Push(cpu.PC - 1, 3);
cpu.JumpLong(addr);
return;
case OpcodeList.JMP_Absolute:
case OpcodeList.JMP_AbsoluteLong:
case OpcodeList.JMP_AbsoluteIndirect:
case OpcodeList.JMP_AbsoluteIndexedIndirectWithX:
case OpcodeList.JMP_AbsoluteIndirectLong:
cpu.JumpLong(addr);
return;
// RTS, RTL, RTI
case OpcodeList.RTI_StackImplied:
cpu.Flags.SetFlags(cpu.Pull(1));
cpu.SyncFlags();
if (cpu.Flags.Emulation)
{
cpu.JumpShort(cpu.Pull(2));
}
else
{
cpu.JumpLong(cpu.Pull(3));
}
return;
case OpcodeList.RTS_StackImplied:
cpu.JumpShort(cpu.Pull(2) + 1);
return;
case OpcodeList.RTL_StackImplied:
addr = cpu.Pull(3);
cpu.JumpLong(addr + 1);
return;
default:
throw new NotImplementedException("ExecuteJumpReturn() opcode not implemented: " + instruction.ToString("X2"));
}
}
public void ExecuteJumpReturn(byte instruction, AddressModes addressMode, int signature)
{
int addr = GetAddress(addressMode, signature, cpu.ProgramBank);
switch (instruction)
{
case OpcodeList.JSR_Absolute:
case OpcodeList.JSR_AbsoluteIndexedIndirectWithX:
cpu.Push(cpu.PC);
cpu.JumpShort(addr);
return;
case OpcodeList.JSR_AbsoluteLong:
cpu.Push(cpu.ProgramBank);
cpu.Push(cpu.PC);
cpu.JumpLong(addr);
return;
case OpcodeList.JMP_Absolute:
case OpcodeList.JMP_AbsoluteLong:
case OpcodeList.JMP_AbsoluteIndirect:
case OpcodeList.JMP_AbsoluteIndexedIndirectWithX:
case OpcodeList.JMP_AbsoluteIndirectLong:
cpu.JumpLong(addr);
return;
case OpcodeList.RTS_StackImplied:
cpu.JumpShort(cpu.Pull(2));
return;
case OpcodeList.RTI_StackImplied:
cpu.Flags.SetFlags(cpu.Pull(1));
int address = cpu.Pull(2);
if (!cpu.Flags.Emulation)
{
cpu.DataBank.Value = cpu.Pull(1);
address += (cpu.DataBank.Value << 16);
}
cpu.JumpLong(address);
cpu.SyncFlags();
return;
case OpcodeList.RTL_StackImplied:
addr = cpu.Pull(3);
cpu.JumpLong(addr);
return;
default:
throw new NotImplementedException("ExecuteJumpReturn() opcode not implemented: " + instruction.ToString("X2"));
}
}
