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First stab at a running M6502 test suite. Running Klaus Dormann tests

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Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
This commit is contained in:
Adrian.Conlon 2017-07-05 17:46:02 +01:00
parent 6db32ae7c5
commit 7910ada7fa
14 changed files with 687 additions and 265 deletions
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81
M6502/inc/mos6502.h
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@ -5,34 +5,32 @@
#include <array>
#include <functional>
#include "Memory.h"
#include "Processor.h"
#include "ProcessorType.h"
#include "StatusFlags.h"
#include "AddressingMode.h"
#include "Signal.h"
namespace EightBit {
class MOS6502 {
class MOS6502 : public Processor {
public:
typedef std::function<void()> instruction_t;
struct Instruction {
instruction_t vector = nullptr;
uint64_t count = 0;
int count = 0;
AddressingMode mode = AddressingMode::Illegal;
std::string display = "";
};
MOS6502(ProcessorType level);
MOS6502(Memory& memory, ProcessorType level);
Signal<MOS6502> ExecutingInstruction;
Signal<MOS6502> ExecutedInstruction;
ProcessorType getLevel() const { return level; }
uint64_t getCycles() const { return cycles; }
bool getProceed() const { return proceed; }
void setProceed(bool value) { proceed = value; }
uint16_t getPC() const { return pc; }
uint8_t getX() const { return x; }
uint8_t getY() const { return y; }
uint8_t getA() const { return a; }
@ -44,49 +42,37 @@ namespace EightBit {
return instructions[code];
}
virtual void Initialise();
virtual void initialise();
virtual void Start(uint16_t address);
virtual void Run();
virtual void Step();
virtual int step();
virtual void Reset();
virtual void TriggerIRQ();
virtual void TriggerNMI();
uint16_t GetWord(uint16_t offset) const;
register16_t GetWord(uint16_t offset);
virtual uint8_t GetByte(uint16_t offset) const = 0;
virtual void SetByte(uint16_t offset, uint8_t value) = 0;
uint8_t GetByte(uint16_t offset) { return m_memory.read(offset); }
void SetByte(uint16_t offset, uint8_t value) { m_memory.write(offset, value); }
protected:
virtual void Interrupt(uint16_t vector);
virtual void Execute(uint8_t cell);
virtual int Execute(uint8_t cell);
void ___();
void ResetRegisters();
private:
static Instruction INS(instruction_t method, uint64_t cycles, AddressingMode addressing, std::string display);
static uint8_t LowNybble(uint8_t value);
static uint8_t HighNybble(uint8_t value);
static uint8_t PromoteNybble(uint8_t value);
static uint8_t DemoteNybble(uint8_t value);
static uint8_t LowByte(uint16_t value);
static uint8_t HighByte(uint16_t value);
static uint16_t MakeWord(uint8_t low, uint8_t high);
static Instruction INS(instruction_t method, int cycles, AddressingMode addressing, std::string display);
void Install6502Instructions();
void Install65sc02Instructions();
void Install65c02Instructions();
void InstallInstructionSet(std::array<Instruction, 0x100> basis);
void OverlayInstructionSet(std::array<Instruction, 0x100> overlay);
void OverlayInstructionSet(std::array<Instruction, 0x100> overlay, bool includeIllegal);
void InstallInstructionSet(const std::array<Instruction, 0x100>& basis);
void OverlayInstructionSet(const std::array<Instruction, 0x100>& overlay);
void OverlayInstructionSet(const std::array<Instruction, 0x100>& overlay, bool includeIllegal);
bool UpdateZeroFlag(uint8_t datum);
bool UpdateNegativeFlag(int8_t datum);
@ -94,25 +80,25 @@ namespace EightBit {
void PushByte(uint8_t value);
uint8_t PopByte();
void PushWord(uint16_t value);
uint16_t PopWord();
void PushWord(register16_t value);
register16_t PopWord();
uint8_t FetchByte();
uint16_t FetchWord();
register16_t FetchWord();
uint16_t Address_ZeroPage();
uint16_t Address_ZeroPageX();
uint16_t Address_ZeroPageY();
uint16_t Address_IndexedIndirectX();
uint16_t Address_IndexedIndirectY_Read();
uint16_t Address_IndexedIndirectY_Write();
uint16_t Address_Absolute();
uint16_t Address_AbsoluteXIndirect();
uint16_t Address_AbsoluteX_Read();
uint16_t Address_AbsoluteX_Write();
uint16_t Address_AbsoluteY_Read();
uint16_t Address_AbsoluteY_Write();
uint16_t Address_ZeroPageIndirect();
register16_t Address_ZeroPage();
register16_t Address_ZeroPageX();
register16_t Address_ZeroPageY();
register16_t Address_IndexedIndirectX();
register16_t Address_IndexedIndirectY_Read();
register16_t Address_IndexedIndirectY_Write();
register16_t Address_Absolute();
register16_t Address_AbsoluteXIndirect();
register16_t Address_AbsoluteX_Read();
register16_t Address_AbsoluteX_Write();
register16_t Address_AbsoluteY_Read();
register16_t Address_AbsoluteY_Write();
register16_t Address_ZeroPageIndirect();
uint8_t ReadByte_Immediate();
int8_t ReadByte_ImmediateDisplacement();
@ -446,7 +432,6 @@ namespace EightBit {
const uint16_t RSTvector = 0xfffc;
const uint16_t NMIvector = 0xfffa;
uint16_t pc; // program counter
uint8_t x; // index register X
uint8_t y; // index register Y
uint8_t a; // accumulator
@ -454,8 +439,6 @@ namespace EightBit {
StatusFlags p = 0; // processor status
uint64_t cycles;
bool proceed = true;
std::array<Instruction, 0x100> instructions;

2
M6502/src/Disassembly.cpp
View File

@ -78,7 +78,7 @@ uint8_t EightBit::Disassembly::GetByte(uint16_t address) const {
}
uint16_t EightBit::Disassembly::GetWord(uint16_t address) const {
return processor.GetWord(address);
return processor.GetWord(address).word;
}
////

8
M6502/src/M6502.vcxproj
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@ -29,26 +29,26 @@
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
<ConfigurationType>StaticLibrary</ConfigurationType>
<UseDebugLibraries>true</UseDebugLibraries>
<PlatformToolset>v141</PlatformToolset>
<PlatformToolset>v140</PlatformToolset>
<CharacterSet>Unicode</CharacterSet>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
<ConfigurationType>StaticLibrary</ConfigurationType>
<UseDebugLibraries>false</UseDebugLibraries>
<PlatformToolset>v141</PlatformToolset>
<PlatformToolset>v140</PlatformToolset>
<WholeProgramOptimization>true</WholeProgramOptimization>
<CharacterSet>Unicode</CharacterSet>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
<ConfigurationType>StaticLibrary</ConfigurationType>
<UseDebugLibraries>true</UseDebugLibraries>
<PlatformToolset>v141</PlatformToolset>
<PlatformToolset>v140</PlatformToolset>
<CharacterSet>Unicode</CharacterSet>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
<ConfigurationType>StaticLibrary</ConfigurationType>
<UseDebugLibraries>false</UseDebugLibraries>
<PlatformToolset>v141</PlatformToolset>
<PlatformToolset>v140</PlatformToolset>
<WholeProgramOptimization>true</WholeProgramOptimization>
<CharacterSet>Unicode</CharacterSet>
</PropertyGroup>

2
M6502/src/Profiler.cpp
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@ -24,7 +24,7 @@ void EightBit::Profiler::EmitProfileInformation() {
{
StartingLineOutput.fire(EventArgs());
// For each memory address
for (uint16_t address = 0; address < 0x10000; ++address) {
for (int address = 0; address < 0x10000; ++address) {
// If there are any cycles associated
auto cycles = addressProfiles[address];
if (cycles > 0) {

416
M6502/src/mos6502.cpp
View File

@ -1,33 +1,35 @@
#include "stdafx.h"
#include "mos6502.h"
EightBit::MOS6502::MOS6502(ProcessorType cpuLevel)
: level(cpuLevel) {
EightBit::MOS6502::MOS6502(Memory& memory, ProcessorType cpuLevel)
: Processor(memory),
level(cpuLevel) {
Install6502Instructions();
Install65sc02Instructions();
Install65c02Instructions();
}
void EightBit::MOS6502::Initialise() {
cycles = 0;
ResetRegisters();
void EightBit::MOS6502::initialise() {
Processor::initialise();
PC().word = 0;
x = 0x80;
y = 0;
a = 0;
p = 0;
p.reserved = true;
s = 0xff;
}
void EightBit::MOS6502::Start(uint16_t address) {
pc = address;
}
void EightBit::MOS6502::Run() {
while (proceed)
Step();
}
void EightBit::MOS6502::Step() {
Execute(FetchByte());
int EightBit::MOS6502::step() {
return Execute(FetchByte());
}
void EightBit::MOS6502::Reset() {
pc = GetWord(RSTvector);
PC() = GetWord(RSTvector);
}
void EightBit::MOS6502::TriggerIRQ() {
@ -38,24 +40,29 @@ void EightBit::MOS6502::TriggerNMI() {
Interrupt(NMIvector);
}
uint16_t EightBit::MOS6502::GetWord(uint16_t offset) const {
auto low = GetByte(offset);
auto high = GetByte((uint16_t)(offset + 1));
return MakeWord(low, high);
EightBit::register16_t EightBit::MOS6502::GetWord(uint16_t offset) {
register16_t returned;
returned.low = GetByte(offset);
returned.high = GetByte(offset + 1);
return returned;
}
void EightBit::MOS6502::Interrupt(uint16_t vector) {
PushWord(pc);
PushWord(PC());
PushByte(p);
p.interrupt = true;
pc = GetWord(vector);
PC() = GetWord(vector);
}
void EightBit::MOS6502::Execute(uint8_t cell) {
int EightBit::MOS6502::Execute(uint8_t cell) {
cycles = 0;
ExecutingInstruction.fire(*this);
const auto& instruction = instructions[cell];
const auto& method = instruction.vector;
method();
cycles += instruction.count;
ExecutedInstruction.fire(*this);
return cycles;
}
void EightBit::MOS6502::___() {
@ -69,19 +76,7 @@ void EightBit::MOS6502::___() {
}
}
void EightBit::MOS6502::ResetRegisters() {
pc = 0;
x = 0x80;
y = 0;
a = 0;
p = 0;
p.reserved = true;
s = 0xff;
}
EightBit::MOS6502::Instruction EightBit::MOS6502::INS(instruction_t method, uint64_t cycles, AddressingMode addressing, std::string display) {
EightBit::MOS6502::Instruction EightBit::MOS6502::INS(instruction_t method, int cycles, AddressingMode addressing, std::string display) {
MOS6502::Instruction returnValue;
returnValue.vector = method;
returnValue.count = cycles;
@ -90,34 +85,6 @@ EightBit::MOS6502::Instruction EightBit::MOS6502::INS(instruction_t method, uint
return returnValue;
}
uint8_t EightBit::MOS6502::LowNybble(uint8_t value) {
return value & 0xf;
}
uint8_t EightBit::MOS6502::HighNybble(uint8_t value) {
return DemoteNybble(value);
}
uint8_t EightBit::MOS6502::PromoteNybble(uint8_t value) {
return value << 4;
}
uint8_t EightBit::MOS6502::DemoteNybble(uint8_t value) {
return value >> 4;
}
uint8_t EightBit::MOS6502::LowByte(uint16_t value) {
return value & 0xff;
}
uint8_t EightBit::MOS6502::HighByte(uint16_t value) {
return (value & ~0xff) >> 8;
}
uint16_t EightBit::MOS6502::MakeWord(uint8_t low, uint8_t high) {
return (high << 8) + low;
}
////
#define BIND(method) std::bind(&MOS6502:: method, this)
@ -198,15 +165,15 @@ void EightBit::MOS6502::Install65c02Instructions() {
}
}
void EightBit::MOS6502::InstallInstructionSet(std::array<Instruction, 0x100> basis) {
void EightBit::MOS6502::InstallInstructionSet(const std::array<Instruction, 0x100>& basis) {
OverlayInstructionSet(basis, true);
}
void EightBit::MOS6502::OverlayInstructionSet(std::array<Instruction, 0x100> overlay) {
void EightBit::MOS6502::OverlayInstructionSet(const std::array<Instruction, 0x100>& overlay) {
OverlayInstructionSet(overlay, false);
}
void EightBit::MOS6502::OverlayInstructionSet(std::array<Instruction, 0x100> overlay, bool includeIllegal) {
void EightBit::MOS6502::OverlayInstructionSet(const std::array<Instruction, 0x100>& overlay, bool includeIllegal) {
for (uint16_t i = 0; i < 0x100; ++i) {
auto newInstruction = overlay[i];
auto illegal = newInstruction.mode == AddressingMode::Illegal;
@ -248,89 +215,106 @@ uint8_t EightBit::MOS6502::PopByte() {
return GetByte(PageOne + ++s);
}
void EightBit::MOS6502::PushWord(uint16_t value) {
PushByte(HighByte(value));
PushByte(LowByte(value));
void EightBit::MOS6502::PushWord(register16_t value) {
PushByte(value.high);
PushByte(value.low);
}
uint16_t EightBit::MOS6502::PopWord() {
auto low = PopByte();
auto high = PopByte();
return MakeWord(low, high);
EightBit::register16_t EightBit::MOS6502::PopWord() {
register16_t returned;
returned.low = PopByte();
returned.high = PopByte();
return returned;
}
uint8_t EightBit::MOS6502::FetchByte() {
return GetByte(pc++);
return GetByte(PC().word++);
}
uint16_t EightBit::MOS6502::FetchWord() {
auto word = GetWord(pc);
pc += 2;
EightBit::register16_t EightBit::MOS6502::FetchWord() {
auto word = GetWord(PC().word);
PC().word += 2;
return word;
}
////
uint16_t EightBit::MOS6502::Address_ZeroPage() {
return FetchByte();
EightBit::register16_t EightBit::MOS6502::Address_ZeroPage() {
register16_t returned;
returned.low = FetchByte();
returned.high = 0;
return returned;
}
uint16_t EightBit::MOS6502::Address_ZeroPageX() {
return LowByte(FetchByte() + x);
EightBit::register16_t EightBit::MOS6502::Address_ZeroPageX() {
register16_t returned;
returned.low = FetchByte() + x;
returned.high = 0;
return returned;
}
uint16_t EightBit::MOS6502::Address_ZeroPageY() {
return LowByte(FetchByte() + y);
EightBit::register16_t EightBit::MOS6502::Address_ZeroPageY() {
register16_t returned;
returned.low = FetchByte() + y;
returned.high = 0;
return returned;
}
uint16_t EightBit::MOS6502::Address_IndexedIndirectX() {
return GetWord(Address_ZeroPageX());
EightBit::register16_t EightBit::MOS6502::Address_IndexedIndirectX() {
return GetWord(Address_ZeroPageX().word);
}
uint16_t EightBit::MOS6502::Address_IndexedIndirectY_Read() {
EightBit::register16_t EightBit::MOS6502::Address_IndexedIndirectY_Read() {
auto indirection = GetWord(FetchByte());
if (LowByte(indirection) == 0xff)
if (indirection.low == 0xff)
++cycles;
return indirection + y;
indirection.word += y;
return indirection;
}
uint16_t EightBit::MOS6502::Address_IndexedIndirectY_Write() {
return GetWord(FetchByte()) + y;
EightBit::register16_t EightBit::MOS6502::Address_IndexedIndirectY_Write() {
auto indirection = GetWord(FetchByte());
indirection.word += y;
return indirection;
}
uint16_t EightBit::MOS6502::Address_Absolute() {
EightBit::register16_t EightBit::MOS6502::Address_Absolute() {
return FetchWord();
}
uint16_t EightBit::MOS6502::Address_AbsoluteXIndirect() {
return GetWord(FetchWord() + x);
EightBit::register16_t EightBit::MOS6502::Address_AbsoluteXIndirect() {
return GetWord(FetchWord().word + x);
}
uint16_t EightBit::MOS6502::Address_AbsoluteX_Read() {
auto address = FetchWord();
auto offset = (uint16_t)(address + x);
if (LowByte(offset) == 0xff)
EightBit::register16_t EightBit::MOS6502::Address_AbsoluteX_Read() {
auto offset = FetchWord();
offset.word += x;
if (offset.low == 0xff)
++cycles;
return offset;
}
uint16_t EightBit::MOS6502::Address_AbsoluteX_Write() {
return FetchWord() + x;
EightBit::register16_t EightBit::MOS6502::Address_AbsoluteX_Write() {
auto address = FetchWord();
address.word += x;
return address;
}
uint16_t EightBit::MOS6502::Address_AbsoluteY_Read() {
auto address = FetchWord();
auto offset = (uint16_t)(address + y);
if (LowByte(offset) == 0xff)
EightBit::register16_t EightBit::MOS6502::Address_AbsoluteY_Read() {
auto offset = FetchWord();
offset.word += y;
if (offset.low == 0xff)
++cycles;
return offset;
}
uint16_t EightBit::MOS6502::Address_AbsoluteY_Write() {
return FetchWord() + y;
EightBit::register16_t EightBit::MOS6502::Address_AbsoluteY_Write() {
auto address = FetchWord();
address.word += y;
return address;
}
uint16_t EightBit::MOS6502::Address_ZeroPageIndirect() {
EightBit::register16_t EightBit::MOS6502::Address_ZeroPageIndirect() {
return GetWord(FetchByte());
}
@ -345,77 +329,77 @@ int8_t EightBit::MOS6502::ReadByte_ImmediateDisplacement() {
}
uint8_t EightBit::MOS6502::ReadByte_ZeroPage() {
return GetByte(Address_ZeroPage());
return GetByte(Address_ZeroPage().word);
}
uint8_t EightBit::MOS6502::ReadByte_ZeroPageX() {
return GetByte(Address_ZeroPageX());
return GetByte(Address_ZeroPageX().word);
}
uint8_t EightBit::MOS6502::ReadByte_ZeroPageY() {
return GetByte(Address_ZeroPageY());
return GetByte(Address_ZeroPageY().word);
}
uint8_t EightBit::MOS6502::ReadByte_Absolute() {
return GetByte(Address_Absolute());
return GetByte(Address_Absolute().word);
}
uint8_t EightBit::MOS6502::ReadByte_AbsoluteX() {
return GetByte(Address_AbsoluteX_Read());
return GetByte(Address_AbsoluteX_Read().word);
}
uint8_t EightBit::MOS6502::ReadByte_AbsoluteY() {
return GetByte(Address_AbsoluteY_Read());
return GetByte(Address_AbsoluteY_Read().word);
}
uint8_t EightBit::MOS6502::ReadByte_IndexedIndirectX() {
return GetByte(Address_IndexedIndirectX());
return GetByte(Address_IndexedIndirectX().word);
}
uint8_t EightBit::MOS6502::ReadByte_IndirectIndexedY() {
return GetByte(Address_IndexedIndirectY_Read());
return GetByte(Address_IndexedIndirectY_Read().word);
}
uint8_t EightBit::MOS6502::ReadByte_ZeroPageIndirect() {
return GetByte(Address_ZeroPageIndirect());
return GetByte(Address_ZeroPageIndirect().word);
}
////
void EightBit::MOS6502::WriteByte_ZeroPage(uint8_t value) {
SetByte(Address_ZeroPage(), value);
SetByte(Address_ZeroPage().word, value);
}
void EightBit::MOS6502::WriteByte_Absolute(uint8_t value) {
SetByte(Address_Absolute(), value);
SetByte(Address_Absolute().word, value);
}
void EightBit::MOS6502::WriteByte_AbsoluteX(uint8_t value) {
SetByte(Address_AbsoluteX_Write(), value);
SetByte(Address_AbsoluteX_Write().word, value);
}
void EightBit::MOS6502::WriteByte_AbsoluteY(uint8_t value) {
SetByte(Address_AbsoluteY_Write(), value);
SetByte(Address_AbsoluteY_Write().word, value);
}
void EightBit::MOS6502::WriteByte_ZeroPageX(uint8_t value) {
SetByte(Address_ZeroPageX(), value);
SetByte(Address_ZeroPageX().word, value);
}
void EightBit::MOS6502::WriteByte_ZeroPageY(uint8_t value) {
SetByte(Address_ZeroPageY(), value);
SetByte(Address_ZeroPageY().word, value);
}
void EightBit::MOS6502::WriteByte_IndirectIndexedY(uint8_t value) {
SetByte(Address_IndexedIndirectY_Write(), value);
SetByte(Address_IndexedIndirectY_Write().word, value);
}
void EightBit::MOS6502::WriteByte_IndexedIndirectX(uint8_t value) {
SetByte(Address_IndexedIndirectX(), value);
SetByte(Address_IndexedIndirectX().word, value);
}
void EightBit::MOS6502::WriteByte_ZeroPageIndirect(uint8_t value) {
SetByte(Address_ZeroPageIndirect(), value);
SetByte(Address_ZeroPageIndirect().word, value);
}
////
@ -538,37 +522,41 @@ void EightBit::MOS6502::SBC(uint8_t data) {
void EightBit::MOS6502::SBC_b(uint8_t data) {
auto carry = p.carry ? 0 : 1;
auto difference = a - data - carry;
UpdateZeroNegativeFlags((uint8_t)difference);
p.overflow = ((a ^ data) & (a ^ difference) & 0x80) != 0;
p.carry = HighByte((uint16_t)difference) == 0;
register16_t difference;
difference.word = a - data - carry;
a = (uint8_t)difference;
UpdateZeroNegativeFlags(difference.low);
p.overflow = ((a ^ data) & (a ^ difference.low) & 0x80) != 0;
p.carry = difference.high == 0;
a = difference.low;
}
void EightBit::MOS6502::SBC_d(uint8_t data) {
auto carry = p.carry ? 0 : 1;
auto difference = a - data - carry;
register16_t difference;
difference.word = a - data - carry;
if (level < ProcessorType::Cpu65SC02)
UpdateZeroNegativeFlags((uint8_t)difference);
UpdateZeroNegativeFlags(difference.low);
p.overflow = ((a ^ data) & (a ^ difference) & 0x80) != 0;
p.carry = HighByte((uint16_t)difference) == 0;
p.overflow = ((a ^ data) & (a ^ difference.low) & 0x80) != 0;
p.carry = difference.high == 0;
auto low = (uint8_t)(LowNybble(a) - LowNybble(data) - carry);
auto low = (uint8_t)(lowNibble(a) - lowNibble(data) - carry);
auto lowNegative = (int8_t)low < 0;
if (lowNegative)
low -= 6;
uint8_t high = HighNybble(a) - HighNybble(data) - (lowNegative ? 1 : 0);
uint8_t high = highNibble(a) - highNibble(data) - (lowNegative ? 1 : 0);
if ((int8_t)high < 0)
high -= 6;
a = PromoteNybble(high) | LowNybble(low);
a = promoteNibble(high) | lowNibble(low);
if (level >= ProcessorType::Cpu65SC02)
UpdateZeroNegativeFlags(a);
}
@ -591,9 +579,10 @@ void EightBit::MOS6502::CMP(uint8_t data) {
}
void EightBit::MOS6502::CMP(uint8_t first, uint8_t second) {
uint16_t result = first - second;
UpdateZeroNegativeFlags((uint8_t)result);
p.carry = HighByte(result) == 0;
register16_t result;
result.word = first - second;
UpdateZeroNegativeFlags(result.low);
p.carry = result.high == 0;
}
void EightBit::MOS6502::LDA(uint8_t data) {
@ -620,35 +609,39 @@ void EightBit::MOS6502::ADC(uint8_t data) {
void EightBit::MOS6502::ADC_b(uint8_t data) {
auto carry = (uint8_t)(p.carry ? 1 : 0);
auto sum = (uint16_t)(a + data + carry);
UpdateZeroNegativeFlags((uint8_t)sum);
p.overflow = (~(a ^ data) & (a ^ sum) & 0x80) != 0;
p.carry = HighByte(sum) != 0;
register16_t sum;
sum.word = a + data + carry;
a = (uint8_t)sum;
UpdateZeroNegativeFlags(sum.low);
p.overflow = (~(a ^ data) & (a ^ sum.low) & 0x80) != 0;
p.carry = sum.high != 0;
a = sum.low;
}
void EightBit::MOS6502::ADC_d(uint8_t data) {
auto carry = (uint8_t)(p.carry ? 1 : 0);
auto sum = (uint16_t)(a + data + carry);
register16_t sum;
sum.word = a + data + carry;
if (level < ProcessorType::Cpu65SC02)
UpdateZeroNegativeFlags((uint8_t)sum);
UpdateZeroNegativeFlags(sum.low);
auto low = (uint8_t)(LowNybble(a) + LowNybble(data) + carry);
auto low = (uint8_t)(lowNibble(a) + lowNibble(data) + carry);
if (low > 9)
low += 6;
auto high = (uint8_t)(HighNybble(a) + HighNybble(data) + (low > 0xf ? 1 : 0));
p.overflow = (~(a ^ data) & (a ^ PromoteNybble(high)) & 0x80) != 0;
auto high = (uint8_t)(highNibble(a) + highNibble(data) + (low > 0xf ? 1 : 0));
p.overflow = (~(a ^ data) & (a ^ promoteNibble(high)) & 0x80) != 0;
if (high > 9)
high += 6;
p.carry = high > 0xf;
a = (uint8_t)(PromoteNybble(high) | LowNybble(low));
a = (uint8_t)(promoteNibble(high) | lowNibble(low));
if (level >= ProcessorType::Cpu65SC02)
UpdateZeroNegativeFlags(a);
}
@ -671,9 +664,9 @@ void EightBit::MOS6502::SMB(uint16_t address, uint8_t flag) {
void EightBit::MOS6502::Branch(int8_t displacement) {
++cycles;
auto oldPage = HighByte(pc);
pc += (uint16_t)((short)displacement);
auto newPage = HighByte(pc);
auto oldPage = PC().high;
PC().word += displacement;
auto newPage = PC().high;
if (oldPage != newPage)
cycles += 2;
}
@ -694,7 +687,7 @@ void EightBit::MOS6502::BitBranch_Clear(uint8_t check) {
auto contents = GetByte(zp);
auto displacement = FetchByte();
if ((contents & check) == 0)
pc += (uint16_t)displacement;
PC().word += displacement;
}
void EightBit::MOS6502::BitBranch_Set(uint8_t check) {
@ -702,7 +695,7 @@ void EightBit::MOS6502::BitBranch_Set(uint8_t check) {
auto contents = GetByte(zp);
auto displacement = FetchByte();
if ((contents & check) != 0)
pc += (uint16_t)displacement;
PC().word += displacement;
}
//
@ -1085,19 +1078,19 @@ void EightBit::MOS6502::DEC_a() {
}
void EightBit::MOS6502::DEC_absx() {
DEC(Address_AbsoluteX_Write());
DEC(Address_AbsoluteX_Write().word);
}
void EightBit::MOS6502::DEC_zpx() {
DEC(Address_ZeroPageX());
DEC(Address_ZeroPageX().word);
}
void EightBit::MOS6502::DEC_abs() {
DEC(Address_Absolute());
DEC(Address_Absolute().word);
}
void EightBit::MOS6502::DEC_zp() {
DEC(Address_ZeroPage());
DEC(Address_ZeroPage().word);
}
//
@ -1117,19 +1110,19 @@ void EightBit::MOS6502::INC_a() {
}
void EightBit::MOS6502::INC_zp() {
INC(Address_ZeroPage());
INC(Address_ZeroPage().word);
}
void EightBit::MOS6502::INC_absx() {
INC(Address_AbsoluteX_Write());
INC(Address_AbsoluteX_Write().word);
}
void EightBit::MOS6502::INC_zpx() {
INC(Address_ZeroPageX());
INC(Address_ZeroPageX().word);
}
void EightBit::MOS6502::INC_abs() {
INC(Address_Absolute());
INC(Address_Absolute().word);
}
//
@ -1299,33 +1292,33 @@ void EightBit::MOS6502::ASL_a() {
}
void EightBit::MOS6502::ASL_zp() {
ASL(Address_ZeroPage());
ASL(Address_ZeroPage().word);
}
void EightBit::MOS6502::ASL_abs() {
ASL(Address_Absolute());
ASL(Address_Absolute().word);
}
void EightBit::MOS6502::ASL_absx() {
ASL(Address_AbsoluteX_Write());
ASL(Address_AbsoluteX_Write().word);
}
void EightBit::MOS6502::ASL_zpx() {
ASL(Address_ZeroPageX());
ASL(Address_ZeroPageX().word);
}
//
void EightBit::MOS6502::LSR_absx() {
LSR(Address_AbsoluteX_Write());
LSR(Address_AbsoluteX_Write().word);
}
void EightBit::MOS6502::LSR_zpx() {
LSR(Address_ZeroPageX());
LSR(Address_ZeroPageX().word);
}
void EightBit::MOS6502::LSR_abs() {
LSR(Address_Absolute());
LSR(Address_Absolute().word);
}
void EightBit::MOS6502::LSR_a() {
@ -1333,21 +1326,21 @@ void EightBit::MOS6502::LSR_a() {
}
void EightBit::MOS6502::LSR_zp() {
LSR(Address_ZeroPage());
LSR(Address_ZeroPage().word);
}
//
void EightBit::MOS6502::ROL_absx() {
ROL(Address_AbsoluteX_Write());
ROL(Address_AbsoluteX_Write().word);
}
void EightBit::MOS6502::ROL_zpx() {
ROL(Address_ZeroPageX());
ROL(Address_ZeroPageX().word);
}
void EightBit::MOS6502::ROL_abs() {
ROL(Address_Absolute());
ROL(Address_Absolute().word);
}
void EightBit::MOS6502::ROL_a() {
@ -1355,21 +1348,21 @@ void EightBit::MOS6502::ROL_a() {
}
void EightBit::MOS6502::ROL_zp() {
ROL(Address_ZeroPage());
ROL(Address_ZeroPage().word);
}
//
void EightBit::MOS6502::ROR_absx() {
ROR(Address_AbsoluteX_Write());
ROR(Address_AbsoluteX_Write().word);
}
void EightBit::MOS6502::ROR_zpx() {
ROR(Address_ZeroPageX());
ROR(Address_ZeroPageX().word);
}
void EightBit::MOS6502::ROR_abs() {
ROR(Address_Absolute());
ROR(Address_Absolute().word);
}
void EightBit::MOS6502::ROR_a() {
@ -1377,134 +1370,137 @@ void EightBit::MOS6502::ROR_a() {
}
void EightBit::MOS6502::ROR_zp() {
ROR(Address_ZeroPage());
ROR(Address_ZeroPage().word);
}
//
void EightBit::MOS6502::TSB_zp() {
TSB(Address_ZeroPage());
TSB(Address_ZeroPage().word);
}
void EightBit::MOS6502::TSB_abs() {
TSB(Address_Absolute());
TSB(Address_Absolute().word);
}
//
void EightBit::MOS6502::TRB_zp() {
TRB(Address_ZeroPage());
TRB(Address_ZeroPage().word);
}
void EightBit::MOS6502::TRB_abs() {
TRB(Address_Absolute());
TRB(Address_Absolute().word);
}
//
void EightBit::MOS6502::RMB0_zp() {
RMB(Address_ZeroPage(), 1);
RMB(Address_ZeroPage().word, 1);
}
void EightBit::MOS6502::RMB1_zp() {
RMB(Address_ZeroPage(), 2);
RMB(Address_ZeroPage().word, 2);
}
void EightBit::MOS6502::RMB2_zp() {
RMB(Address_ZeroPage(), 4);
RMB(Address_ZeroPage().word, 4);
}
void EightBit::MOS6502::RMB3_zp() {
RMB(Address_ZeroPage(), 8);
RMB(Address_ZeroPage().word, 8);
}
void EightBit::MOS6502::RMB4_zp() {
RMB(Address_ZeroPage(), 0x10);
RMB(Address_ZeroPage().word, 0x10);
}
void EightBit::MOS6502::RMB5_zp() {
RMB(Address_ZeroPage(), 0x20);
RMB(Address_ZeroPage().word, 0x20);
}
void EightBit::MOS6502::RMB6_zp() {
RMB(Address_ZeroPage(), 0x40);
RMB(Address_ZeroPage().word, 0x40);
}
void EightBit::MOS6502::RMB7_zp() {
RMB(Address_ZeroPage(), 0x80);
RMB(Address_ZeroPage().word, 0x80);
}
//
void EightBit::MOS6502::SMB0_zp() {
SMB(Address_ZeroPage(), 1);
SMB(Address_ZeroPage().word, 1);
}
void EightBit::MOS6502::SMB1_zp() {
SMB(Address_ZeroPage(), 2);
SMB(Address_ZeroPage().word, 2);
}
void EightBit::MOS6502::SMB2_zp() {
SMB(Address_ZeroPage(), 4);
SMB(Address_ZeroPage().word, 4);
}
void EightBit::MOS6502::SMB3_zp() {
SMB(Address_ZeroPage(), 8);
SMB(Address_ZeroPage().word, 8);
}
void EightBit::MOS6502::SMB4_zp() {
SMB(Address_ZeroPage(), 0x10);
SMB(Address_ZeroPage().word, 0x10);
}
void EightBit::MOS6502::SMB5_zp() {
SMB(Address_ZeroPage(), 0x20);
SMB(Address_ZeroPage().word, 0x20);
}
void EightBit::MOS6502::SMB6_zp() {
SMB(Address_ZeroPage(), 0x40);
SMB(Address_ZeroPage().word, 0x40);
}
void EightBit::MOS6502::SMB7_zp() {
SMB(Address_ZeroPage(), 0x80);
SMB(Address_ZeroPage().word, 0x80);
}
//
void EightBit::MOS6502::JSR_abs() {
auto destination = Address_Absolute();
PushWord((uint16_t)(pc - 1));
pc = destination;
PC().word--;
PushWord(PC());
PC() = destination;
}
void EightBit::MOS6502::RTI_imp() {
PLP_imp();
pc = PopWord();
PC() = PopWord();
}
void EightBit::MOS6502::RTS_imp() {
pc = (uint16_t)(PopWord() + 1);
PC() = PopWord();
PC().word++;
}
void EightBit::MOS6502::JMP_abs() {
pc = Address_Absolute();
PC() = Address_Absolute();
}
void EightBit::MOS6502::JMP_ind() {
pc = GetWord(Address_Absolute());
PC() = GetWord(Address_Absolute().word);
}
void EightBit::MOS6502::JMP_absxind() {
pc = Address_AbsoluteXIndirect();
PC() = Address_AbsoluteXIndirect();
}
void EightBit::MOS6502::BRK_imp() {
PushWord((uint16_t)(pc + 1));
PC().word++;
PushWord(PC());
PHP_imp();
p.interrupt = true;
if (level >= ProcessorType::Cpu65SC02)
p.decimal = false;
pc = GetWord(IRQvector);
PC() = GetWord(IRQvector);
}
//

94
M6502/test_M6502/Board.cpp Normal file
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@ -0,0 +1,94 @@
#include "stdafx.h"
#include "Board.h"
#include "Disassembly.h"
#include "ProcessorType.h"
#include <iostream>
#include <sstream>
#include <iomanip>
Board::Board(const Configuration& configuration)
: m_configuration(configuration),
m_memory(0xffff),
m_cpu(EightBit::MOS6502(m_memory, EightBit::ProcessorType::Cpu6502)),
m_symbols(""),
m_disassembler(m_cpu, m_symbols),
m_profiler(m_cpu, m_disassembler, m_symbols),
m_oldPC(0xffff),
m_stopped(false) {
}
void Board::initialise() {
m_memory.clear();
auto romDirectory = m_configuration.getRomDirectory();
m_memory.loadRam(romDirectory + "/6502_functional_test.bin", 0); // Klaus Dormann functional tests
if (m_configuration.isProfileMode()) {
m_cpu.ExecutingInstruction.connect(std::bind(&Board::Cpu_ExecutingInstruction_Profile, this, std::placeholders::_1));
}
if (m_configuration.isDebugMode()) {
m_cpu.ExecutingInstruction.connect(std::bind(&Board::Cpu_ExecutingInstruction_Debug, this, std::placeholders::_1));
}
m_cpu.ExecutingInstruction.connect(std::bind(&Board::Cpu_ExecutingInstruction_StopLoop, this, std::placeholders::_1));
m_cpu.ExecutedInstruction.connect(std::bind(&Board::Cpu_ExecutedInstruction_StopLoop, this, std::placeholders::_1));
m_cpu.initialise();
m_cpu.PC() = m_configuration.getStartAddress();
}
void Board::Cpu_ExecutingInstruction_Profile(const EightBit::MOS6502& cpu) {
const auto pc = m_cpu.PC();
//m_profiler.addAddress(pc.word, m_cpu.);
//m_profiler.addInstruction(m_memory.peek(pc.word));
}
void Board::Cpu_ExecutingInstruction_StopLoop(const EightBit::MOS6502& cpu) {
auto pc = m_cpu.PC().word;
if (m_oldPC == pc) {
m_cpu.halt();
m_stopped = true;
} else {
m_oldPC = pc;
}
}
void Board::Cpu_ExecutedInstruction_StopLoop(const EightBit::MOS6502& cpu) {
if (m_stopped) {
auto test = m_cpu.GetByte(0x0200);
std::cout << std::endl << "** Test=" << std::hex << (int)test;
}
}
void Board::Cpu_ExecutingInstruction_Debug(const EightBit::MOS6502& cpu) {
auto address = m_cpu.PC().word;
auto cell = m_memory.peek(address);
const auto& instruction = m_cpu.getInstruction(cell);
auto mode = instruction.mode;
std::cout << std::hex;
std::cout << "PC=" << std::setw(4) << std::setfill('0') << address << ":";
std::cout << "P=" << (std::string)m_cpu.getP() << ", ";
std::cout << std::setw(2);
std::cout << "A=" << (int)m_cpu.getA() << ", ";
std::cout << "X=" << (int)m_cpu.getX() << ", ";
std::cout << "Y=" << (int)m_cpu.getY() << ", ";
std::cout << "S=" << (int)m_cpu.getS() << "\t";
std::cout << m_disassembler.Dump_ByteValue(cell);
std::cout << m_disassembler.DumpBytes(mode, address + 1);
std::cout << "\t ";
std::cout << m_disassembler.Disassemble(address);
std::cout << std::endl;
}

38
M6502/test_M6502/Board.h Normal file
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@ -0,0 +1,38 @@
#pragma once
#include <string>
#include "Memory.h"
#include "Configuration.h"
#include "Profiler.h"
#include "EventArgs.h"
#include "Disassembly.h"
#include "mos6502.h"
#include "Symbols.h"
class Board {
public:
Board(const Configuration& configuration);
EightBit::Memory& Memory() { return m_memory; }
EightBit::MOS6502& CPU() { return m_cpu; }
void initialise();
private:
const Configuration& m_configuration;
EightBit::Memory m_memory;
EightBit::MOS6502 m_cpu;
EightBit::Symbols m_symbols;
EightBit::Disassembly m_disassembler;
EightBit::Profiler m_profiler;
uint16_t m_oldPC;
bool m_stopped;
void Cpu_ExecutingInstruction_Debug(const EightBit::MOS6502& cpu);
void Cpu_ExecutingInstruction_Profile(const EightBit::MOS6502& cpu);
void Cpu_ExecutingInstruction_StopLoop(const EightBit::MOS6502& cpu);
void Cpu_ExecutedInstruction_StopLoop(const EightBit::MOS6502& cpu);
};

8
M6502/test_M6502/Configuration.cpp Normal file
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@ -0,0 +1,8 @@
#include "stdafx.h"
#include "Configuration.h"
Configuration::Configuration()
: m_debugMode(false),
m_profileMode(false),
m_romDirectory("roms") {
}

42
M6502/test_M6502/Configuration.h Normal file
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@ -0,0 +1,42 @@
#pragma once
#include <string>
#include "Memory.h"
class Configuration {
public:
Configuration();
bool isDebugMode() const {
return m_debugMode;
}
void setDebugMode(bool value) {
m_debugMode = value;
}
bool isProfileMode() const {
return m_profileMode;
}
void setProfileMode(bool value) {
m_profileMode = value;
}
std::string getRomDirectory() const {
return m_romDirectory;
}
EightBit::register16_t getStartAddress() const {
EightBit::register16_t returned;
returned.word = 0x400;
return returned;
}
private:
bool m_debugMode;
bool m_profileMode;
std::string m_romDirectory;
};

8
M6502/test_M6502/stdafx.cpp Normal file
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@ -0,0 +1,8 @@
// stdafx.cpp : source file that includes just the standard includes
// test_M6502.pch will be the pre-compiled header
// stdafx.obj will contain the pre-compiled type information
#include "stdafx.h"
// TODO: reference any additional headers you need in STDAFX.H
// and not in this file

17
M6502/test_M6502/stdafx.h Normal file
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@ -0,0 +1,17 @@
#pragma once
#include <string>
#include <sstream>
#include <iomanip>
#include <iostream>
//
//#include <ctime>
//#include <iostream>
//#include <chrono>
//#include <iomanip>
//
//#include <boost/timer/timer.hpp>
//#include <boost/chrono.hpp>

25
M6502/test_M6502/test.cpp Normal file
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@ -0,0 +1,25 @@
#include "stdafx.h"
#include "TestHarness.h"
#include "Configuration.h"
#include "Board.h"
#include <iostream>
int main(int argc, char* argv[]) {
Configuration configuration;
#ifdef _DEBUG
configuration.setDebugMode(true);
configuration.setProfileMode(true);
#endif
configuration.setDebugMode(false);
EightBit::TestHarness<Configuration, Board> harness(configuration);
harness.initialise();
harness.runLoop();
return 0;
}

173
M6502/test_M6502/test_M6502.vcxproj Normal file
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