spc700.cpp

SFC游戏模拟器 snes9x 1.43 的原代码

    CMP (APURegisters.YA.B.Y, Work8);
    IAPU.PC += 2;
}

void ApuAD ()
{
// CMP Y,#00
    Work8 = OP1;
    CMP (APURegisters.YA.B.Y, Work8);
    IAPU.PC += 2;
}

void Apu1F ()
{
// JMP (abs+X)
    Absolute ();
    IAPU.PC = IAPU.RAM + S9xAPUGetByte (IAPU.Address + APURegisters.X) +
	(S9xAPUGetByte (IAPU.Address + APURegisters.X + 1) << 8);
// XXX: HERE:
    // APU.Flags |= TRACE_FLAG;
}

void Apu5F ()
{
// JMP abs
    Absolute ();
    IAPU.PC = IAPU.RAM + IAPU.Address;
}

void Apu20 ()
{
// CLRP
    APUClearDirectPage ();
    IAPU.DirectPage = IAPU.RAM;
    IAPU.PC++;
}

void Apu60 ()
{
// CLRC
    APUClearCarry ();
    IAPU.PC++;
}

void ApuE0 ()
{
// CLRV
    APUClearHalfCarry ();
    APUClearOverflow ();
    IAPU.PC++;
}

void Apu24 ()
{
// AND A,dp
    APURegisters.YA.B.A &= S9xAPUGetByteZ (OP1);
    APUSetZN8 (APURegisters.YA.B.A);
    IAPU.PC += 2;
}

void Apu25 ()
{
// AND A,abs
    Absolute ();
    APURegisters.YA.B.A &= S9xAPUGetByte (IAPU.Address);
    APUSetZN8 (APURegisters.YA.B.A);
    IAPU.PC += 3;
}

void Apu26 ()
{
// AND A,(X)
    APURegisters.YA.B.A &= S9xAPUGetByteZ (APURegisters.X);
    APUSetZN8 (APURegisters.YA.B.A);
    IAPU.PC++;
}

void Apu27 ()
{
// AND A,(dp+X)
    IndexedXIndirect ();
    APURegisters.YA.B.A &= S9xAPUGetByte (IAPU.Address);
    APUSetZN8 (APURegisters.YA.B.A);
    IAPU.PC += 2;
}

void Apu28 ()
{
// AND A,#00
    APURegisters.YA.B.A &= OP1;
    APUSetZN8 (APURegisters.YA.B.A);
    IAPU.PC += 2;
}

void Apu29 ()
{
// AND dp(dest),dp(src)
    Work8 = S9xAPUGetByteZ (OP1);
    Work8 &= S9xAPUGetByteZ (OP2);
    S9xAPUSetByteZ (Work8, OP2);
    APUSetZN8 (Work8);
    IAPU.PC += 3;
}

void Apu34 ()
{
// AND A,dp+X
    APURegisters.YA.B.A &= S9xAPUGetByteZ (OP1 + APURegisters.X);
    APUSetZN8 (APURegisters.YA.B.A);
    IAPU.PC += 2;
}

void Apu35 ()
{
// AND A,abs+X
    AbsoluteX ();
    APURegisters.YA.B.A &= S9xAPUGetByte (IAPU.Address);
    APUSetZN8 (APURegisters.YA.B.A);
    IAPU.PC += 3;
}

void Apu36 ()
{
// AND A,abs+Y
    AbsoluteY ();
    APURegisters.YA.B.A &= S9xAPUGetByte (IAPU.Address);
    APUSetZN8 (APURegisters.YA.B.A);
    IAPU.PC += 3;
}

void Apu37 ()
{
// AND A,(dp)+Y
    IndirectIndexedY ();
    APURegisters.YA.B.A &= S9xAPUGetByte (IAPU.Address);
    APUSetZN8 (APURegisters.YA.B.A);
    IAPU.PC += 2;
}

void Apu38 ()
{
// AND dp,#00
    Work8 = OP1;
    Work8 &= S9xAPUGetByteZ (OP2);
    S9xAPUSetByteZ (Work8, OP2);
    APUSetZN8 (Work8);
    IAPU.PC += 3;
}

void Apu39 ()
{
// AND (X),(Y)
    Work8 = S9xAPUGetByteZ (APURegisters.X) & S9xAPUGetByteZ (APURegisters.YA.B.Y);
    APUSetZN8 (Work8);
    S9xAPUSetByteZ (Work8, APURegisters.X);
    IAPU.PC++;
}

void Apu2B ()
{
// ROL dp
    Work8 = S9xAPUGetByteZ (OP1);
    ROL (Work8);
    S9xAPUSetByteZ (Work8, OP1);
    IAPU.PC += 2;
}

void Apu2C ()
{
// ROL abs
    Absolute ();
    Work8 = S9xAPUGetByte (IAPU.Address);
    ROL (Work8);
    S9xAPUSetByte (Work8, IAPU.Address);
    IAPU.PC += 3;
}

void Apu3B ()
{
// ROL dp+X
    Work8 = S9xAPUGetByteZ (OP1 + APURegisters.X);
    ROL (Work8);
    S9xAPUSetByteZ (Work8, OP1 + APURegisters.X);
    IAPU.PC += 2;
}

void Apu3C ()
{
// ROL A
    ROL (APURegisters.YA.B.A);
    IAPU.PC++;
}

void Apu2E ()
{
// CBNE dp,rel
    Work8 = OP1;
    Relative2 ();
    
    if (S9xAPUGetByteZ (Work8) != APURegisters.YA.B.A)
    {
	IAPU.PC = IAPU.RAM + (uint16) Int16;
	APU.Cycles += IAPU.TwoCycles;
	APUShutdown ();
    }
    else
	IAPU.PC += 3;
}

void ApuDE ()
{
// CBNE dp+X,rel
    Work8 = OP1 + APURegisters.X;
    Relative2 ();

    if (S9xAPUGetByteZ (Work8) != APURegisters.YA.B.A)
    {
	IAPU.PC = IAPU.RAM + (uint16) Int16;
	APU.Cycles += IAPU.TwoCycles;
	APUShutdown ();
    }
    else
	IAPU.PC += 3;
}

void Apu3D ()
{
// INC X
    APURegisters.X++;
    APUSetZN8 (APURegisters.X);

#ifdef SPC700_SHUTDOWN
    IAPU.WaitCounter++;
#endif

    IAPU.PC++;
}

void ApuFC ()
{
// INC Y
    APURegisters.YA.B.Y++;
    APUSetZN8 (APURegisters.YA.B.Y);

#ifdef SPC700_SHUTDOWN
    IAPU.WaitCounter++;
#endif

    IAPU.PC++;
}

void Apu1D ()
{
// DEC X
    APURegisters.X--;
    APUSetZN8 (APURegisters.X);

#ifdef SPC700_SHUTDOWN
    IAPU.WaitCounter++;
#endif

    IAPU.PC++;
}

void ApuDC ()
{
// DEC Y
    APURegisters.YA.B.Y--;
    APUSetZN8 (APURegisters.YA.B.Y);

#ifdef SPC700_SHUTDOWN
    IAPU.WaitCounter++;
#endif

    IAPU.PC++;
}

void ApuAB ()
{
// INC dp
    Work8 = S9xAPUGetByteZ (OP1) + 1;
    S9xAPUSetByteZ (Work8, OP1);
    APUSetZN8 (Work8);

#ifdef SPC700_SHUTDOWN
    IAPU.WaitCounter++;
#endif

    IAPU.PC += 2;
}

void ApuAC ()
{
// INC abs
    Absolute ();
    Work8 = S9xAPUGetByte (IAPU.Address) + 1;
    S9xAPUSetByte (Work8, IAPU.Address);
    APUSetZN8 (Work8);

#ifdef SPC700_SHUTDOWN
    IAPU.WaitCounter++;
#endif

    IAPU.PC += 3;
}

void ApuBB ()
{
// INC dp+X
    Work8 = S9xAPUGetByteZ (OP1 + APURegisters.X) + 1;
    S9xAPUSetByteZ (Work8, OP1 + APURegisters.X);
    APUSetZN8 (Work8);

#ifdef SPC700_SHUTDOWN
    IAPU.WaitCounter++;
#endif

    IAPU.PC += 2;
}

void ApuBC ()
{
// INC A
    APURegisters.YA.B.A++;
    APUSetZN8 (APURegisters.YA.B.A);

#ifdef SPC700_SHUTDOWN
    IAPU.WaitCounter++;
#endif

    IAPU.PC++;
}

void Apu8B ()
{
// DEC dp
    Work8 = S9xAPUGetByteZ (OP1) - 1;
    S9xAPUSetByteZ (Work8, OP1);
    APUSetZN8 (Work8);

#ifdef SPC700_SHUTDOWN
    IAPU.WaitCounter++;
#endif

    IAPU.PC += 2;
}

void Apu8C ()
{
// DEC abs
    Absolute ();
    Work8 = S9xAPUGetByte (IAPU.Address) - 1;
    S9xAPUSetByte (Work8, IAPU.Address);
    APUSetZN8 (Work8);

#ifdef SPC700_SHUTDOWN
    IAPU.WaitCounter++;
#endif

    IAPU.PC += 3;
}

void Apu9B ()
{
// DEC dp+X
    Work8 = S9xAPUGetByteZ (OP1 + APURegisters.X) - 1;
    S9xAPUSetByteZ (Work8, OP1 + APURegisters.X);
    APUSetZN8 (Work8);

#ifdef SPC700_SHUTDOWN
    IAPU.WaitCounter++;
#endif

    IAPU.PC += 2;
}

void Apu9C ()
{
// DEC A
    APURegisters.YA.B.A--;
    APUSetZN8 (APURegisters.YA.B.A);

#ifdef SPC700_SHUTDOWN
    IAPU.WaitCounter++;
#endif

    IAPU.PC++;
}

void Apu44 ()
{
// EOR A,dp
    APURegisters.YA.B.A ^= S9xAPUGetByteZ (OP1);
    APUSetZN8 (APURegisters.YA.B.A);
    IAPU.PC += 2;
}

void Apu45 ()
{
// EOR A,abs
    Absolute ();
    APURegisters.YA.B.A ^= S9xAPUGetByte (IAPU.Address);
    APUSetZN8 (APURegisters.YA.B.A);
    IAPU.PC += 3;
}

void Apu46 ()
{
// EOR A,(X)
    APURegisters.YA.B.A ^= S9xAPUGetByteZ (APURegisters.X);
    APUSetZN8 (APURegisters.YA.B.A);
    IAPU.PC++;
}

void Apu47 ()
{
// EOR A,(dp+X)
    IndexedXIndirect ();
    APURegisters.YA.B.A ^= S9xAPUGetByte (IAPU.Address);
    APUSetZN8 (APURegisters.YA.B.A);
    IAPU.PC += 2;
}

void Apu48 ()
{
// EOR A,#00
    APURegisters.YA.B.A ^= OP1;
    APUSetZN8 (APURegisters.YA.B.A);
    IAPU.PC += 2;
}

void Apu49 ()
{
// EOR dp(dest),dp(src)
    Work8 = S9xAPUGetByteZ (OP1);
    Work8 ^= S9xAPUGetByteZ (OP2);
    S9xAPUSetByteZ (Work8, OP2);
    APUSetZN8 (Work8);
    IAPU.PC += 3;
}

void Apu54 ()
{
// EOR A,dp+X
    APURegisters.YA.B.A ^= S9xAPUGetByteZ (OP1 + APURegisters.X);
    APUSetZN8 (APURegisters.YA.B.A);
    IAPU.PC += 2;
}

void Apu55 ()
{
// EOR A,abs+X
    AbsoluteX ();
    APURegisters.YA.B.A ^= S9xAPUGetByte (IAPU.Address);
    APUSetZN8 (APURegisters.YA.B.A);
    IAPU.PC += 3;
}

void Apu56 ()
{
// EOR A,abs+Y
    AbsoluteY ();
    APURegisters.YA.B.A ^= S9xAPUGetByte (IAPU.Address);
    APUSetZN8 (APURegisters.YA.B.A);
    IAPU.PC += 3;
}

void Apu57 ()
{
// EOR A,(dp)+Y
    IndirectIndexedY ();
    APURegisters.YA.B.A ^= S9xAPUGetByte (IAPU.Address);
    APUSetZN8 (APURegisters.YA.B.A);
    IAPU.PC += 2;
}

void Apu58 ()
{
// EOR dp,#00
    Work8 = OP1;
    Work8 ^= S9xAPUGetByteZ (OP2);
    S9xAPUSetByteZ (Work8, OP2);
    APUSetZN8 (Work8);
    IAPU.PC += 3;
}

void Apu59 ()
{
// EOR (X),(Y)
    Work8 = S9xAPUGetByteZ (APURegisters.X) ^ S9xAPUGetByteZ (APURegisters.YA.B.Y);
    APUSetZN8 (Work8);
    S9xAPUSetByteZ (Work8, APURegisters.X);
    IAPU.PC++;
}

void Apu4B ()
{
// LSR dp
    Work8 = S9xAPUGetByteZ (OP1);
    LSR (Work8);
    S9xAPUSetByteZ (Work8, OP1);
    IAPU.PC += 2;
}

void Apu4C ()
{
// LSR abs
    Absolute ();
    Work8 = S9xAPUGetByte (IAPU.Address);
    LSR (Work8);
    S9xAPUSetByte (Work8, IAPU.Address);
    IAPU.PC += 3;
}

void Apu5B ()
{
// LSR dp+X
    Work8 = S9xAPUGetByteZ (OP1 + APURegisters.X);
    LSR (Work8);
    S9xAPUSetByteZ (Work8, OP1 + APURegisters.X);
    IAPU.PC += 2;
}

void Apu5C ()
{
// LSR A
    LSR (APURegisters.YA.B.A);
    IAPU.PC++;
}

void Apu7D ()
{
// MOV A,X
    APURegisters.YA.B.A = APURegisters.X;
    APUSetZN8 (APURegisters.YA.B.A);
    IAPU.PC++;
}

void ApuDD ()
{
// MOV A,Y
    APURegisters.YA.B.A = APURegisters.YA.B.Y;
    APUSetZN8 (APURegisters.YA.B.A);
    IAPU.PC++;
}

void Apu5D ()
{
// MOV X,A
    APURegisters.X = APURegisters.YA.B.A;
    APUSetZN8 (APURegisters.X);
    IAPU.PC++;
}

void ApuFD ()
{
// MOV Y,A
    APURegisters.YA.B.Y = APURegisters.YA.B.A;
    APUSetZN8 (APURegisters.YA.B.Y);
    IAPU.PC++;
}

void Apu9D ()
{
//MOV X,SP
    APURegisters.X = APURegisters.S;
    APUSetZN8 (APURegisters.X);
    IAPU.PC++;
}

void ApuBD ()
{
// MOV SP,X
    APURegisters.S = APURegisters.X;
    IAPU.PC++;
}

void Apu6B ()
{
// ROR dp
    Work8 = S9xAPUGetByteZ (OP1);
    ROR (Work8);
    S9xAPUSetByteZ (Work8, OP1);
    IAPU.PC += 2;
}

void Apu6C ()
{
// ROR abs
    Absolute ();
    Work8 = S9xAPUGetByte (IAPU.Address);
    ROR (Work8);
    S9xAPUSetByte (Work8, IAPU.Address);
    IAPU.PC += 3;
}

void Apu7B ()
{
// ROR dp+X
    Work8 = S9xAPUGetByteZ (OP1 + APURegisters.X);
    ROR (Work8);
    S9xAPUSetByteZ (Work8, OP1 + APURegisters.X);
    IAPU.PC += 2;
}

void Apu7C ()
{
// ROR A
    ROR (APURegisters.YA.B.A);
    IAPU.PC++;
}

void Apu6E ()
{
// DBNZ dp,rel
    Work8 = OP1;
    Relative2 ();
    W1 = S9xAPUGetByteZ (Work8) - 1;
    S9xAPUSetByteZ (W1, Work8);
    if (W1 != 0)
    {
	IAPU.PC = IAPU.RAM + (uint16) Int16;
	APU.Cycles += IAPU.TwoCycles;
    }
    else
	IAPU.PC += 3;
}

void ApuFE ()
{
// DBNZ Y,rel
    Relative ();
    APURegisters.YA.B.Y--;
    if (APURegisters.YA.B.Y != 0)
    {
	IAPU.PC = IAPU.RAM + (uint16) Int16;
	APU.Cycles += IAPU.TwoCycles;
    }
    else
	IAPU.PC += 2;
}

void Apu6F ()