diff options
Diffstat (limited to 'Noddybox.Emulation.EightBit.Z80/Z80CpuBaseOpcodes.cs')
| -rw-r--r-- | Noddybox.Emulation.EightBit.Z80/Z80CpuBaseOpcodes.cs | 695 |
1 files changed, 0 insertions, 695 deletions
diff --git a/Noddybox.Emulation.EightBit.Z80/Z80CpuBaseOpcodes.cs b/Noddybox.Emulation.EightBit.Z80/Z80CpuBaseOpcodes.cs deleted file mode 100644 index 40b31ca..0000000 --- a/Noddybox.Emulation.EightBit.Z80/Z80CpuBaseOpcodes.cs +++ /dev/null @@ -1,695 +0,0 @@ -//
-// Copyright (c) 2012 Ian Cowburn
-//
-using System;
-using System.Net;
-using System.Windows;
-using System.Windows.Controls;
-using System.Windows.Documents;
-using System.Windows.Ink;
-using System.Windows.Input;
-using System.Windows.Media;
-using System.Windows.Media.Animation;
-using System.Windows.Shapes;
-
-namespace Noddybox.Emulation.EightBit.Z80
-{
- public partial class Z80Cpu
- {
- #region Status register helpers
-
- /// <summary>
- /// Set a flag in the status register.
- /// </summary>
- /// <param name="flag">The flag.</param>
- private void SetFlag(Z80Flags flag)
- {
- F |= flag;
- }
-
- /// <summary>
- /// Clear a flag in the status register.
- /// </summary>
- /// <param name="flag">The flag.</param>
- private void ClearFlag(Z80Flags flag)
- {
- F &= ~flag;
- }
-
- #endregion
-
- #region Stack commands
-
- /// <summary>
- /// Push a value on the stack.
- /// </summary>
- /// <param name="val">The value.</param>
- private void PUSH(ushort val)
- {
- memory.Write(--SP, (byte)(val & 0xff));
- memory.Write(--SP, (byte)(Binary.ShiftRight(val, 8) & 0xff));
- }
-
- /// <summary>
- /// Pop a value from the stack.
- /// </summary>
- /// <returns></returns>
- private ushort POP()
- {
- SP = (ushort)((SP + 2) & 0xffff);
- return (ushort)(memory.Read((ushort)(SP-2)) |
- (memory.Read((ushort)(SP - 1)) >> 8));
- }
-
- #endregion
-
- #region ALU arithmetic and comparison
-
- /// <summary>
- /// Add an 8-bit value to the accumulator without carry.
- /// </summary>
- /// <param name="b">The vakue.</param>
- private void Add8(byte b)
- {
- int w = A + b;
-
- F = SZtable[w] | H35table[w & 0xff];
-
- if (((A ^ w ^ b) & (int)Z80Flags.HalfCarry) == (int)Z80Flags.HalfCarry)
- {
- F |= Z80Flags.HalfCarry;
- }
-
- if (((b ^ A) & (b ^ w) & 0x80) > 0)
- {
- F |= Z80Flags.PV;
- }
-
- A = (byte)(w & 0xff);
- }
-
- /// <summary>
- /// Add an 8-bit value to the accumulator with carry.
- /// </summary>
- /// <param name="b">The vakue.</param>
- private void Adc8(byte b)
- {
- int w = A + b + (int)(F & Z80Flags.Carry);
-
- F = SZtable[w] | H35table[w & 0xff];
-
- if (((A ^ w ^ b) & (int)Z80Flags.HalfCarry) == (int)Z80Flags.HalfCarry)
- {
- F |= Z80Flags.HalfCarry;
- }
-
- if (((b ^ A) & (b ^ w) & 0x80) > 0)
- {
- F |= Z80Flags.PV;
- }
-
- A = (byte)(w & 0xff);
- }
-
- /// <summary>
- /// Subtract an 8-bit value from the accumulator without carry.
- /// </summary>
- /// <param name="b">The vakue.</param>
- private void Sub8(byte b)
- {
- int w = A - b;
-
- if (w < 0)
- {
- w += 0x200;
- }
-
- F = SZtable[w] | H35table[w & 0xff] | Z80Flags.Neg;
-
- if (((A ^ w ^ b) & (int)Z80Flags.HalfCarry) == (int)Z80Flags.HalfCarry)
- {
- F |= Z80Flags.HalfCarry;
- }
-
- if (((b ^ A) & (b ^ w) & 0x80) > 0)
- {
- F |= Z80Flags.PV;
- }
-
- A = (byte)(w & 0xff);
- }
-
- /// <summary>
- /// Compare an 8-bit value with the accumulator.
- /// </summary>
- /// <param name="b">The vakue.</param>
- private void Cmp8(byte b)
- {
- int w = A - b;
-
- if (w < 0)
- {
- w += 0x200;
- }
-
- F = SZtable[w] | H35table[w & 0xff] | Z80Flags.Neg;
-
- if (((A ^ w ^ b) & (int)Z80Flags.HalfCarry) == (int)Z80Flags.HalfCarry)
- {
- F |= Z80Flags.HalfCarry;
- }
-
- if (((b ^ A) & (b ^ w) & 0x80) > 0)
- {
- F |= Z80Flags.PV;
- }
- }
-
- /// <summary>
- /// Subtract an 8-bit value from the accumulator with carry.
- /// </summary>
- /// <param name="b">The vakue.</param>
- private void Sbc8(byte b)
- {
- int w = A - b - (int)(F & Z80Flags.Carry);
-
- if (w < 0)
- {
- w += 0x200;
- }
-
- F = SZtable[w] | H35table[w & 0xff] | Z80Flags.Neg;
-
- if (((A ^ w ^ b) & (int)Z80Flags.HalfCarry) == (int)Z80Flags.HalfCarry)
- {
- F |= Z80Flags.HalfCarry;
- }
-
- if (((b ^ A) & (b ^ w) & 0x80) > 0)
- {
- F |= Z80Flags.PV;
- }
-
- A = (byte)(w & 0xff);
- }
-
- /// <summary>
- /// Add a 16-bit value to a register without carry.
- /// </summary>
- /// <param name="b">The vakue.</param>
- private void Add16(ref ushort reg, ushort b)
- {
- int w = reg + b;
-
- F &= Z80Flags.Sign | Z80Flags.Zero | Z80Flags.PV;
-
- if (w > 0xffff)
- {
- F |= Z80Flags.Carry;
- }
-
- if ((reg ^ w ^ b) == 0x1000)
- {
- F |= Z80Flags.HalfCarry;
- }
-
- reg = (ushort)(w & 0xffff);
-
- F |= H35table[reg >> 8];
- }
-
- /// <summary>
- /// Add a 16-bit value to a register with carry.
- /// </summary>
- /// <param name="b">The vakue.</param>
- private void Adc16(ref ushort reg, ushort b)
- {
- int w = reg + b + (int)(F & Z80Flags.Carry);
-
- F = Z80Flags.None;
-
- if ((w & 0xffff) == 0)
- {
- F |= Z80Flags.Zero;
- }
-
- if ((w & 0x8000) == 0x8000)
- {
- F |= Z80Flags.Sign;
- }
-
- if (w > 0xffff)
- {
- F |= Z80Flags.Carry;
- }
-
- if (((b ^ reg ^ 0x8000) & ((reg ^ w) & 0x8000)) == 0x8000)
- {
- F |= Z80Flags.PV;
- }
-
- if ((reg ^ w ^ b) == 0x1000)
- {
- F |= Z80Flags.HalfCarry;
- }
-
- reg = (ushort)(w & 0xffff);
-
- F |= H35table[reg >> 8];
- }
-
-
- /// <summary>
- /// Subtract a 16-bit value from a register with carry.
- /// </summary>
- /// <param name="b">The vakue.</param>
- private void Sbc16(ref ushort reg, ushort b)
- {
- int w = reg - b - (int)(F & Z80Flags.Carry);
-
- F = Z80Flags.Neg;
-
- if (w < 0)
- {
- w += 0x10000;
- F |= Z80Flags.Carry;
- }
-
- if ((w & 0xffff) == 0)
- {
- F |= Z80Flags.Zero;
- }
-
- if ((w & 0x8000) == 0x8000)
- {
- F |= Z80Flags.Sign;
- }
-
- if (((b ^ reg) & ((reg ^ w) & 0x8000)) == 0x8000)
- {
- F |= Z80Flags.PV;
- }
-
- if ((reg ^ w ^ b) == 0x1000)
- {
- F |= Z80Flags.HalfCarry;
- }
-
- reg = (ushort)(w & 0xffff);
-
- F |= H35table[reg >> 8];
- }
-
- /// <summary>
- /// Increment an 8-bit register.
- /// </summary>
- /// <param name="reg">The register to increment.</param>
- void Inc8(ref byte reg)
- {
- reg++;
-
- F = Z80Flags.Carry;
-
- if (reg == 0x80)
- {
- F |= Z80Flags.PV;
- }
-
- if ((reg & 0x0f) == 0x00)
- {
- F |= Z80Flags.HalfCarry;
- }
- }
-
- /// <summary>
- /// Decrement an 8-bit register.
- /// </summary>
- /// <param name="reg">The register to decrement.</param>
- void Dec8(ref byte reg)
- {
- reg--;
-
- F = Z80Flags.Carry | Z80Flags.Neg;
-
- if (reg == 0x7f)
- {
- F |= Z80Flags.PV;
- }
-
- if ((reg & 0x0f) == 0x0f)
- {
- F |= Z80Flags.HalfCarry;
- }
- }
-
- #endregion
-
- #region ALU rotate and shift operations
-
- /// <summary>
- /// Do RRCA.
- /// </summary>
- private void RRCA()
- {
- F &= Z80Flags.Sign | Z80Flags.Zero | Z80Flags.PV;
- F |= (Z80Flags)(A & 1);
- A = (byte)(Binary.ShiftRight(A, 1) | Binary.ShiftLeft(A, 7));
- F |= H35table[A];
- }
-
- /// <summary>
- /// Do RRA.
- /// </summary>
- private void RRA()
- {
- byte carry = (byte)(F & Z80Flags.Carry);
- F &= Z80Flags.Sign | Z80Flags.Zero | Z80Flags.PV;
- F |= (Z80Flags)(A & 1);
- A = (byte)(Binary.ShiftRight(A, 1) | Binary.ShiftLeft(carry, 7));
- F |= H35table[A];
- }
-
- /// <summary>
- /// Do RRC.
- /// </summary>
- /// <param name="reg">The register to operate on.</param>
- private void RRC(ref byte reg)
- {
- F = (Z80Flags)(reg & (int)Z80Flags.Carry);
- reg = (byte)(Binary.ShiftRight(reg, 1) | Binary.ShiftLeft(reg, 7));
- F |= PSZtable[reg] | H35table[reg];
- }
-
- /// <summary>
- /// Do RR.
- /// </summary>
- /// <param name="reg">The register to operate on.</param>
- private void RR(ref byte reg)
- {
- byte carry = (byte)(F & Z80Flags.Carry);
- F = (Z80Flags)(reg & (int)Z80Flags.Carry);
- reg = (byte)(Binary.ShiftRight(reg, 1) | Binary.ShiftLeft(carry, 7));
- F |= PSZtable[reg] | H35table[reg];
- }
-
- /// <summary>
- /// Do RLCA.
- /// </summary>
- private void RLCA()
- {
- F = (F & Z80Flags.PV | Z80Flags.Sign | Z80Flags.Zero)
- | (Z80Flags)Binary.ShiftRight(A, 7);
-
- A = (byte)(Binary.ShiftLeft(A, 1) | Binary.ShiftRight(A, 7));
-
- F |= H35table[A];
- }
-
- /// <summary>
- /// Do RLA.
- /// </summary>
- private void RLA()
- {
- byte carry = (byte)(F & Z80Flags.Carry);
- F = (F & Z80Flags.PV | Z80Flags.Sign | Z80Flags.Zero)
- | (Z80Flags)Binary.ShiftRight(A, 7);
- A = (byte)(Binary.ShiftRight(A, 1) | carry);
- F |= H35table[A];
- }
-
- /// <summary>
- /// Do RLC.
- /// </summary>
- /// <param name="reg">The register to operate on.</param>
- private void RLC(ref byte reg)
- {
- byte carry = Binary.ShiftRight(reg, 7);
- reg = (byte)(Binary.ShiftLeft(reg, 1) | carry);
- F = PSZtable[reg] | (Z80Flags)carry | H35table[reg];
- }
-
- /// <summary>
- /// Do RL.
- /// </summary>
- /// <param name="reg">The register to operate on.</param>
- private void RL(ref byte reg)
- {
- byte carry = Binary.ShiftRight(reg, 7);
- reg = (byte)(Binary.ShiftLeft(reg, 1) | (int)(F & Z80Flags.Carry));
- F = PSZtable[reg] | (Z80Flags)carry | H35table[reg];
- }
-
- /// <summary>
- /// Do SRL.
- /// </summary>
- /// <param name="reg">The register to operate on.</param>
- private void SRL(ref byte reg)
- {
- byte carry = (byte)(reg & 1);
- reg = Binary.ShiftLeft(reg, 1);
- F = PSZtable[reg] | (Z80Flags)carry | H35table[reg];
- }
-
- /// <summary>
- /// Do SRA.
- /// </summary>
- /// <param name="reg">The register to operate on.</param>
- private void SRA(ref byte reg)
- {
- byte carry = (byte)(reg & 1);
- reg = (byte)(Binary.ShiftLeft(reg, 1) | (reg & 0x80));
- F = PSZtable[reg] | (Z80Flags)carry | H35table[reg];
- }
-
- /// <summary>
- /// Do SLL.
- /// </summary>
- /// <param name="reg">The register to operate on.</param>
- private void SLL(ref byte reg)
- {
- byte carry = Binary.ShiftRight(reg, 7);
- reg = (byte)(Binary.ShiftRight(reg, 1) | 0x01);
- F = PSZtable[reg] | (Z80Flags)carry | H35table[reg];
- }
-
- /// <summary>
- /// Do SLA.
- /// </summary>
- /// <param name="reg">The register to operate on.</param>
- private void SLA(ref byte reg)
- {
- byte carry = Binary.ShiftRight(reg, 7);
- reg = Binary.ShiftRight(reg, 1);
- F = PSZtable[reg] | (Z80Flags)carry | H35table[reg];
- }
-
- #endregion
-
- #region ALU boolean operations
-
- /// <summary>
- /// AND a value with the accumulator.
- /// </summary>
- /// <param name="val">The value.</param>
- void AND(byte val)
- {
- A &= val;
- F = PSZtable[A] | Z80Flags.HalfCarry | H35table[A];
- }
-
- /// <summary>
- /// OR a value with the accumulator.
- /// </summary>
- /// <param name="val">The value.</param>
- void OR(byte val)
- {
- A |= val;
- F = PSZtable[A] | Z80Flags.HalfCarry | H35table[A];
- }
-
- /// <summary>
- /// XOR a value with the accumulator.
- /// </summary>
- /// <param name="val">The value.</param>
- void XOR(byte val)
- {
- A ^= val;
- F = PSZtable[A] | Z80Flags.HalfCarry | H35table[A];
- }
-
- /// <summary>
- /// Perform the BIT operation.
- /// </summary>
- /// <param name="reg">The register to operate on.</param>
- /// <param name="bit">The bit to test.</param>
- void BIT(ref byte reg, int bit)
- {
- F &= Z80Flags.Carry;
- F |= Z80Flags.HalfCarry;
-
- if ((reg & (1 << bit)) != 0)
- {
- if (bit == 7 && (reg & (int)Z80Flags.Sign) != 0)
- {
- F |= Z80Flags.Sign;
- }
-
- if (bit == 5 && (reg & (int)Z80Flags.Hidden5) != 0)
- {
- F |= Z80Flags.Hidden5;
- }
-
- if (bit == 3 && (reg & (int)Z80Flags.Hidden3) != 0)
- {
- F |= Z80Flags.Hidden3;
- }
- }
- else
- {
- F |= Z80Flags.Zero | Z80Flags.PV;
- }
- }
-
- /// <summary>
- /// Perform the bit set operation.
- /// </summary>
- /// <param name="reg">The register to operate on.</param>
- /// <param name="bit">The bit to test.</param>
- void BIT_SET(ref byte reg, int bit)
- {
- reg |= (byte)(1 << bit);
- }
-
- /// <summary>
- /// Perform the bit clear operation.
- /// </summary>
- /// <param name="reg">The register to operate on.</param>
- /// <param name="bit">The bit to test.</param>
- void BIT_RES(ref byte reg, int bit)
- {
- reg &= (byte)~(1 << bit);
- }
-
- #endregion
-
- #region Jump operations
-
- /// <summary>
- /// The call operation.
- /// </summary>
- private void CALL()
- {
- PUSH((ushort)(PC + 2));
- PC = (ushort)(memory.Read(PC) | memory.Read((ushort)(PC+1)) >> 8);
- }
-
- /// <summary>
- /// The jump operation.
- /// </summary>
- private void JP()
- {
- PC = (ushort)(memory.Read(PC) | memory.Read((ushort)(PC+1)) >> 8);
- }
-
- /// <summary>
- /// The jump relative operation.
- /// </summary>
- private void JR()
- {
- PC = (ushort)(PC + (sbyte)memory.Read(PC) + 1);
- }
-
- /// <summary>
- /// Jump relative if the passed condition flag ANDed with the flag
- /// register equals the passed check value.
- /// </summary>
- /// <param name="cond">The condition flag.</param>
- /// <param name="val">The check value.</param>
- private void JR_COND(Z80Flags cond, Z80Flags val)
- {
- if ((F & cond) == val)
- {
- clock.Add(12);
- JR();
- }
- else
- {
- clock.Add(7);
- PC++;
- }
- }
-
- /// <summary>
- /// Jump if the passed condition flag ANDed with the flag
- /// register equals the passed check value.
- /// </summary>
- /// <param name="cond">The condition flag.</param>
- /// <param name="val">The check value.</param>
- private void JP_COND(Z80Flags cond, Z80Flags val)
- {
- clock.Add(10);
-
- if ((F & cond) == val)
- {
- JP();
- }
- else
- {
- PC+=2;
- }
- }
-
- /// <summary>
- /// Call if the passed condition flag ANDed with the flag
- /// register equals the passed check value.
- /// </summary>
- /// <param name="cond">The condition flag.</param>
- /// <param name="val">The check value.</param>
- private void CALL_COND(Z80Flags cond, Z80Flags val)
- {
- if ((F & cond) == val)
- {
- clock.Add(17);
- CALL();
- }
- else
- {
- clock.Add(10);
- PC+=2;
- }
- }
-
- /// <summary>
- /// Return if the passed condition flag ANDed with the flag
- /// register equals the passed check value.
- /// </summary>
- /// <param name="cond">The condition flag.</param>
- /// <param name="val">The check value.</param>
- private void RET_COND(Z80Flags cond, Z80Flags val)
- {
- if ((F & cond) == val)
- {
- clock.Add(11);
- PC = POP();
- }
- else
- {
- clock.Add(5);
- }
- }
-
- /// <summary>
- /// Reset the PC to an address
- /// register equals the passed check value.
- /// </summary>
- /// <param name="addr">The address.</param>
- private void RST(ushort addr)
- {
- clock.Add(11);
- PUSH(PC);
- PC = addr;
- }
-
- #endregion
- }
-}
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