public void CheckAnd_Ani_()
{
// ANDI #<data>,<ea>
// 0000 0010 0001 1001 0x0219
// 0000 0000 0000 0101 0x000A
// ANDI #10,(A1)
byte[] data = new byte[]
{
0x02, 0x19, 0x00, 0x0A
};
MegadriveState state = new MegadriveState(new Data(data), 0x00000000, 0x00000000, 0x000000, 0x3FFFFF, 0x0FF0000, 0xFFFFFF);
state.WriteAReg(0x1, 0x00FF0000);
state.WriteByte(0x00FF0000, 0xFF);
state.WriteByte(0x00FF0002, 0xAA);
state.WriteDReg(0x1, 0xFF);
state.FetchOpCode();
var opcode = new ANDI(state);
Assert.That(opcode.Assembly, Is.EqualTo("ANDI #10,(A1)+"));
Assert.That(state.PC, Is.EqualTo(0x04));
Assert.That(state.ReadAReg(0x1), Is.EqualTo(0x00FF0001));
Assert.That(state.ReadByte(0x00FF0000), Is.EqualTo(0x0000000A));
}
public void CheckAddD1To_A0_()
{
// ADD Dn,<ea>
// 1101 dddD ssmm mxxx
// 1101 0011 0001 0000 0xD310
// ADD D1,(A0)
byte[] data = new byte[]
{
0xD3, 0x10
};
MegadriveState state = new MegadriveState(new Data(data), 0x00000000, 0x00000000, 0x000000, 0x3FFFFF, 0x0FF0000, 0xFFFFFF);
state.WriteDReg(0x1, 0x22221111);
state.WriteAReg(0x0, 0x00FF0000);
state.WriteByte(0x00FF0000, 0x22);
state.FetchOpCode();
var opcode = new ADD(state);
Assert.That(opcode.Assembly, Is.EqualTo("ADD.B D1,(A0)"));
Assert.That(state.PC, Is.EqualTo(0x02));
Assert.That(state.ReadAReg(0x0), Is.EqualTo(0x00FF0000));
Assert.That(state.ReadDReg(0x1), Is.EqualTo(0x22221111));
Assert.That(state.ReadByte(0x00FF0000), Is.EqualTo(0x33));
}
public void CheckMoveNumberToDRegister(byte number, DataRegister register)
{
// 0111ddd0bbbbbbbb
// MOVEQ #0,D0
byte hi = 0x70;
byte lo = number;
hi |= (byte)((byte)register << 1);
byte[] data = new byte[]
{
hi, lo
};
MegadriveState state = new MegadriveState(new Data(data), 0x00000000, 0x00000000, 0x000000, 0x3FFFFF, 0x0FF0000, 0xFFFFFF);
state.WriteAReg(0x5, 0xFF0000);
for (int i = 0; i < 16; i++)
{
state.WriteByte((uint)(0xFF0000 + i), (byte)(0x00 + i));
}
state.FetchOpCode();
var opcode = new MOVEQ(state);
Assert.That(opcode.Assembly, Is.EqualTo($"MOVEQ #{number},{register}"));
Assert.That(opcode.Size, Is.EqualTo(Size.Long));
Assert.That(state.ReadDReg((byte)register), Is.EqualTo(number));
}
public void CheckLoad_A0_ToA1()
{
// LEA <ea>,An
// 0100 0011 1101 0000 0x43D0
// LEA (A0),A1
byte[] data = new byte[]
{
0x43, 0xD0
};
MegadriveState state = new MegadriveState(new Data(data), 0x00000000, 0x00000000, 0x000000, 0x3FFFFF, 0x0FF0000, 0xFFFFFF);
state.WriteAReg(0x0, 0x00FF0000);
state.WriteByte(0x00FF0000, 0xAA);
state.FetchOpCode();
var opcode = new LEA(state);
Assert.That(opcode.Assembly, Is.EqualTo("LEA (A0),A1"));
Assert.That(opcode.Size, Is.EqualTo(Size.Long));
Assert.That(state.PC, Is.EqualTo(0x00000002));
Assert.That(state.ReadAReg(0x0), Is.EqualTo(0x00FF0000));
Assert.That(state.ReadAReg(0x1), Is.EqualTo(0x00FF0000));
}
public void CheckMove_A0i_ToA1()
{
// 00ss aaa0 01mm mxxx
// 0010 0010 0101 1000 0x2258
// MOVEM <ea>,An
// MOVEM (A0)+,A1
byte[] data = new byte[]
{
0x22, 0x58
};
MegadriveState state = new MegadriveState(new Data(data), 0x00000000, 0x00000000, 0x000000, 0x3FFFFF, 0x0FF0000, 0xFFFFFF);
state.WriteByte(0x00FF0000, 0xAA);
state.WriteByte(0x00FF0001, 0xBB);
state.WriteByte(0x00FF0002, 0xCC);
state.WriteByte(0x00FF0003, 0xDD);
state.WriteAReg(0x0, 0x00FF0000);
state.FetchOpCode();
var opcode = new MOVEA(state);
Assert.That(opcode.Assembly, Is.EqualTo($"MOVEA (A0)+,A1"));
Assert.That(opcode.Size, Is.EqualTo(Size.Long));
Assert.That(state.ReadAReg(0x0), Is.EqualTo(0x00FF0004));
Assert.That(state.ReadAReg(0x1), Is.EqualTo(0xAABBCCDD));
}
public void CheckA5PostIncMoveLongToReg()
{
// MOVEM <ea>,<ea>
// 0100 1100 1101 1101 0x4CDD
// 0001 1111 0000 0000 0x1F00
// MOVEM (A5)+,0001111100000000
byte[] data = new byte[]
{
0x4C, 0xDD, 0x1F, 0x00
};
MegadriveState state = new MegadriveState(new Data(data), 0x00000000, 0x00000000, 0x000000, 0x3FFFFF, 0x0FF0000, 0xFFFFFF);
state.WriteAReg(0x5, 0xFF0000);
for (int i = 0; i < 64; i++)
{
state.WriteByte((uint)(0xFF0000 + i), (byte)(0x00 + i));
}
state.FetchOpCode();
var opcode = new MOVEM(state);
Assert.That(opcode.Assembly, Is.EqualTo("MOVEM (A5)+,%0001111100000000"));
Assert.That(opcode.Size, Is.EqualTo(Size.Long));
Assert.That(state.ReadAReg(0x0), Is.EqualTo(0x00010203));
Assert.That(state.ReadAReg(0x1), Is.EqualTo(0x04050607));
Assert.That(state.ReadAReg(0x2), Is.EqualTo(0x08090A0B));
Assert.That(state.ReadAReg(0x3), Is.EqualTo(0x0C0D0E0F));
Assert.That(state.ReadAReg(0x4), Is.EqualTo(0x10111213));
Assert.That(state.ReadAReg(0x5), Is.EqualTo(0x00FF0014));
Assert.That(state.ReadAReg(0x6), Is.EqualTo(0x0000));
Assert.That(state.ReadAReg(0x7), Is.EqualTo(0x0000));
Assert.That(state.ReadDReg(0x0), Is.EqualTo(0x0000));
Assert.That(state.ReadDReg(0x1), Is.EqualTo(0x0000));
Assert.That(state.ReadDReg(0x2), Is.EqualTo(0x0000));
Assert.That(state.ReadDReg(0x3), Is.EqualTo(0x0000));
Assert.That(state.ReadDReg(0x4), Is.EqualTo(0x0000));
Assert.That(state.ReadDReg(0x5), Is.EqualTo(0x0000));
Assert.That(state.ReadDReg(0x6), Is.EqualTo(0x0000));
Assert.That(state.ReadDReg(0x7), Is.EqualTo(0x0000));
Assert.That(state.PC, Is.EqualTo(0x00000004));
Assert.That(state.ReadAReg(0x5), Is.EqualTo(0x00FF0014));
}
public void CheckA5PostIncMoveWordToReg()
{
// MOVEM <ea>,<ea>
// 0100 1100 1001 1101 0x4C9D
// 0000 0000 1110 0000 0x00E0
// MOVEM (A5)+,0000000011100000
byte[] data = new byte[]
{
0x4C, 0x9D, 0x00, 0xE0
};
MegadriveState state = new MegadriveState(new Data(data), 0x00000000, 0x00000000, 0x000000, 0x3FFFFF, 0x0FF0000, 0xFFFFFF);
state.WriteAReg(0x5, 0xFF0000);
for (int i = 0; i < 16; i++)
{
state.WriteByte((uint)(0xFF0000 + i), (byte)(0x00 + i));
}
state.FetchOpCode();
var opcode = new MOVEM(state);
Assert.That(opcode.Assembly, Is.EqualTo("MOVEM (A5)+,%0000000011100000"));
Assert.That(opcode.Size, Is.EqualTo(Size.Word));
Assert.That(state.ReadAReg(0x0), Is.EqualTo(0x0000));
Assert.That(state.ReadAReg(0x1), Is.EqualTo(0x0000));
Assert.That(state.ReadAReg(0x2), Is.EqualTo(0x0000));
Assert.That(state.ReadAReg(0x3), Is.EqualTo(0x0000));
Assert.That(state.ReadAReg(0x4), Is.EqualTo(0x0000));
Assert.That(state.ReadAReg(0x5), Is.EqualTo(0xFF0006));
Assert.That(state.ReadAReg(0x6), Is.EqualTo(0x0000));
Assert.That(state.ReadAReg(0x7), Is.EqualTo(0x0000));
Assert.That(state.ReadDReg(0x0), Is.EqualTo(0x0000));
Assert.That(state.ReadDReg(0x1), Is.EqualTo(0x0000));
Assert.That(state.ReadDReg(0x2), Is.EqualTo(0x0000));
Assert.That(state.ReadDReg(0x3), Is.EqualTo(0x0000));
Assert.That(state.ReadDReg(0x4), Is.EqualTo(0x0000));
Assert.That(state.ReadDReg(0x5), Is.EqualTo(0x0001));
Assert.That(state.ReadDReg(0x6), Is.EqualTo(0x0203));
Assert.That(state.ReadDReg(0x7), Is.EqualTo(0x0405));
Assert.That(state.PC, Is.EqualTo(0x00000004));
Assert.That(state.ReadAReg(0x5), Is.EqualTo(0x00FF0006));
}
public void CheckLoadA0ToA1()
{
// LEA <ea>,An
// 0100 0011 1100 1000 0x43C8
// LEA A0,A1
byte[] data = new byte[]
{
0x43, 0xC8
};
MegadriveState state = new MegadriveState(new Data(data), 0x00000000, 0x00000000, 0x000000, 0x3FFFFF, 0x0FF0000, 0xFFFFFF);
state.WriteAReg(0x0, 0xAABBCCDD);
state.FetchOpCode();
Assert.Throws <InvalidOpCodeException>(() => new LEA(state));
}
public void CheckLoad_dA0_ToA1()
{
// LEA <ea>,An
// 0100 0011 1110 0000 0x43E0
// LEA -(A0),A1
byte[] data = new byte[]
{
0x43, 0xE0
};
MegadriveState state = new MegadriveState(new Data(data), 0x00000000, 0x00000000, 0x000000, 0x3FFFFF, 0x0FF0000, 0xFFFFFF);
state.WriteAReg(0x0, 0x00FF0004);
state.WriteByte(0x00FF0000, 0xAA);
state.FetchOpCode();
Assert.Throws <InvalidOpCodeException>(() => new LEA(state));
}
public void CheckAddD1ToA0()
{
// ADD Dn,<ea>
// 1101 dddD ssmm mxxx
// 1101 0011 0000 1000 0xD308
// ADD.B D1,A0
byte[] data = new byte[]
{
0xD3, 0x08
};
MegadriveState state = new MegadriveState(new Data(data), 0x00000000, 0x00000000, 0x000000, 0x3FFFFF, 0x0FF0000, 0xFFFFFF);
state.WriteDReg(0x0, 0x22221111);
state.WriteAReg(0x1, 0x33332222);
state.FetchOpCode();
Assert.Throws <InvalidOpCodeException>(() => new ADD(state));
}
public void CheckMoveA0ToD1()
{
// MOVE <ea>,<ea>
// 0001 0010 0000 1000 0x1208
// MOVE A0,D1
byte[] data = new byte[]
{
0x12, 0x08
};
MegadriveState state = new MegadriveState(new Data(data), 0x00000000, 0x00000000, 0x000000, 0x3FFFFF, 0x0FF0000, 0xFFFFFF);
state.WriteAReg(0x0, 0xAABBCCDD);
state.FetchOpCode();
var opcode = new MOVE(state);
Assert.That(opcode.Assembly, Is.EqualTo("MOVE.b A0,D1"));
Assert.That(state.PC, Is.EqualTo(0x02));
Assert.That(state.ReadDReg(0x1), Is.EqualTo(0x000000DD));
}
public void CheckMoveA0ToA1()
{
// 00ss aaa0 01mm mxxx
// 0001 0010 0100 1000 0x1248
// MOVEM <ea>,An
// MOVEM A0,A1
byte[] data = new byte[]
{
0x12, 0x48
};
MegadriveState state = new MegadriveState(new Data(data), 0x00000000, 0x00000000, 0x000000, 0x3FFFFF, 0x0FF0000, 0xFFFFFF);
state.WriteAReg(0x0, 0xAABBCCDD);
state.FetchOpCode();
var opcode = new MOVEA(state);
Assert.That(opcode.Assembly, Is.EqualTo($"MOVEA A0,A1"));
Assert.That(opcode.Size, Is.EqualTo(Size.Word));
Assert.That(state.ReadAReg(0x1), Is.EqualTo(0xCCDD));
}
public void CheckMove_A0_ToD1()
{
// MOVE <ea>,<ea>
// 0001 0010 0001 0000 0x1210
// MOVE (A0), D1
byte[] data = new byte[]
{
0x12, 0x10
};
MegadriveState state = new MegadriveState(new Data(data), 0x00000000, 0x00000000, 0x000000, 0x3FFFFF, 0x0FF0000, 0xFFFFFF);
state.WriteAReg(0x0, 0x00FF0000);
state.WriteByte(0x00FF0000, 0xAA);
state.FetchOpCode();
var opcode = new MOVE(state);
Assert.That(opcode.Assembly, Is.EqualTo("MOVE.b (A0),D1"));
Assert.That(state.PC, Is.EqualTo(0x02));
Assert.That(state.ReadDReg(0x1), Is.EqualTo(0x000000AA));
}
/// <summary>
/// Initializes a new instance of the <see cref="MOVEM"/> class.
/// </summary>
/// <param name="state">machine state.</param>
public MOVEM(MegadriveState state)
: base("01001D001smmmxxx", state)
{
this.mask = state.ReadWord(state.PC);
state.PC += 2;
this.EffectiveAddress = this.FetchEffectiveAddress();
// TODO: should the increment only include values that are beingset?
switch (this.Size)
{
case Size.Word:
switch (this.GetDirection())
{
case MoveDirection.MemoryToRegister:
ushort maskCheck = 1;
int count = 0;
for (int i = 0; i < 8; i++)
{
uint d = state.ReadWord((uint)(this.EffectiveAddress + (count * 2)));
if ((this.mask & maskCheck) == maskCheck)
{
state.WriteDReg((byte)i, d);
count++;
}
maskCheck += maskCheck;
}
for (int i = 0; i < 8; i++)
{
uint d = state.ReadWord((uint)(this.EffectiveAddress + (count * 2)));
if ((this.mask & maskCheck) == maskCheck)
{
state.WriteAReg((byte)i, d);
count++;
}
maskCheck += maskCheck;
}
this.WriteValueToEffectiveAddress(this.DecodeEffectiveAddressMode(), this.GetXn(), (uint)(this.EffectiveAddress + (count * 2)));
break;
case MoveDirection.RegisterToMemory:
throw new System.NotImplementedException();
default:
throw new InvalidStateException();
}
break;
case Size.Long:
switch (this.GetDirection())
{
case MoveDirection.MemoryToRegister:
ushort maskCheck = 1;
int count = 0;
for (int i = 0; i < 8; i++)
{
uint d = state.ReadLong((uint)(this.EffectiveAddress + (count * 4)));
if ((this.mask & maskCheck) == maskCheck)
{
state.WriteDReg((byte)i, d);
count++;
}
maskCheck += maskCheck;
}
for (int i = 0; i < 8; i++)
{
uint d = state.ReadLong((uint)(this.EffectiveAddress + (count * 4)));
if ((this.mask & maskCheck) == maskCheck)
{
state.WriteAReg((byte)i, d);
count++;
}
maskCheck += maskCheck;
}
this.WriteValueToEffectiveAddress(this.DecodeEffectiveAddressMode(), this.GetXn(), (uint)(this.EffectiveAddress + (count * 4)));
break;
case MoveDirection.RegisterToMemory:
throw new System.NotImplementedException();
default:
throw new InvalidStateException();
}
break;
default:
throw new InvalidStateException();
}
}