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Refactor MC6809 core to use lambdas in preference to std::bind methods.

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Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
This commit is contained in:
Adrian Conlon 2018-11-18 22:15:49 +00:00
parent 2de467dde8
commit 859804d179
3 changed files with 62 additions and 92 deletions
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124
MC6809/test/Board.cpp
View File

@ -2,10 +2,7 @@
#include "Board.h"
Board::Board(const Configuration& configuration)
: m_configuration(configuration),
m_cpu(EightBit::mc6809(*this)),
m_disassembler(*this, m_cpu) {
}
: m_configuration(configuration) {}
void Board::powerOn() {
@ -20,7 +17,7 @@ void Board::powerOn() {
// Get the ACIA ready for action
ADDRESS() = 0b1010000000000000;
ACIA().DATA() = EightBit::mc6850::CR0 | EightBit::mc6850::CR1; // Master reset
updateAciaPins(EightBit::Chip::PinLevel::Low);
updateAciaPinsWrite();
ACIA().lower(ACIA().CTS());
ACIA().powerOn();
accessAcia();
@ -38,59 +35,76 @@ void Board::initialise() {
const auto directory = m_configuration.getRomDirectory() + "\\";
loadHexFile(directory + "ExBasROM.hex");
// Once the reset has completed, we can wire the ACIA event handlers...
ACIA().Transmitting.connect(std::bind(&Board::Acia_Transmitting, this, std::placeholders::_1));
// Catch a byte being transmitted
ACIA().Transmitting.connect([this] (EightBit::EventArgs&) {
std::cout << ACIA().TDR();
ACIA().markTransmitComplete();
});
// Wire bus events...
WrittenByte.connect(std::bind(&Board::Bus_WrittenByte_Acia, this, std::placeholders::_1));
ReadingByte.connect(std::bind(&Board::Bus_ReadingByte_Acia, this, std::placeholders::_1));
// Marshal data from memory -> ACIA
WrittenByte.connect([this] (EightBit::EventArgs&) {
updateAciaPinsWrite();
if (accessAcia()) {
ACIA().DATA() = DATA();
accessAcia();
}
});
// Marshal data from ACIA -> memory
ReadingByte.connect([this] (EightBit::EventArgs&) {
updateAciaPinsRead();
if (accessAcia())
poke(ACIA().DATA());
});
// Keyboard wiring, check for input once per frame
CPU().ExecutedInstruction.connect([this] (EightBit::mc6809& cpu) {
assert(cpu.cycles() > 0);
m_frameCycleCount -= cpu.cycles();
if (m_frameCycleCount < 0) {
if (_kbhit()) {
ACIA().RDR() = _getch();
ACIA().markReceiveStarting();
}
m_frameCycleCount = Configuration::FrameCycleInterval;
}
});
// Wire CPU events
CPU().ExecutedInstruction.connect(std::bind(&Board::Cpu_ExecutedInstruction_Acia, this, std::placeholders::_1));
if (m_configuration.isDebugMode()) {
CPU().ExecutingInstruction.connect(std::bind(&Board::Cpu_ExecutingInstruction_Debug, this, std::placeholders::_1));
CPU().ExecutedInstruction.connect(std::bind(&Board::Cpu_ExecutedInstruction_Debug, this, std::placeholders::_1));
// MC6809 disassembly wiring
CPU().ExecutingInstruction.connect([this] (EightBit::mc6809& cpu) {
m_disassembleAt = cpu.PC();
m_ignoreDisassembly = m_disassembler.ignore();
});
CPU().ExecutedInstruction.connect([this] (EightBit::mc6809&) {
if (!m_ignoreDisassembly)
std::cout << m_disassembler.trace(m_disassembleAt) << " " << ACIA().dumpStatus() << std::endl;
});
}
if (m_configuration.terminatesEarly())
CPU().ExecutedInstruction.connect(std::bind(&Board::Cpu_ExecutedInstruction_Terminator, this, std::placeholders::_1));
}
void Board::Cpu_ExecutingInstruction_Debug(EightBit::mc6809&) {
m_disassembleAt = CPU().PC();
m_ignoreDisassembly = m_disassembler.ignore();
}
void Board::Cpu_ExecutedInstruction_Debug(EightBit::mc6809&) {
if (!m_ignoreDisassembly)
std::cout << m_disassembler.trace(m_disassembleAt) << " " << ACIA().dumpStatus() << std::endl;
if (m_configuration.terminatesEarly()) {
// Early termination condition for CPU timing code
CPU().ExecutedInstruction.connect([this] (EightBit::mc6809& cpu) {
assert(cpu.cycles() > 0);
m_totalCycleCount += cpu.cycles();
if (m_totalCycleCount > Configuration::TerminationCycles)
powerOff();
});
}
}
EightBit::MemoryMapping Board::mapping(uint16_t address) {
if (address < 0x8000)
return { m_ram, 0x0000, 0xffff, EightBit::MemoryMapping::ReadWrite };
return { m_ram, 0x0000, EightBit::Chip::Mask16, EightBit::MemoryMapping::ReadWrite };
if (address < 0xa000)
return { m_unused2000, 0x8000, 0xffff, EightBit::MemoryMapping::ReadOnly };
return { m_unused2000, 0x8000, EightBit::Chip::Mask16, EightBit::MemoryMapping::ReadOnly };
if (address < 0xc000)
return { m_io, 0xa000, 0xffff, EightBit::MemoryMapping::ReadWrite };
return { m_io, 0xa000, EightBit::Chip::Mask16, EightBit::MemoryMapping::ReadWrite };
return { m_rom, 0xc000, 0xffff, EightBit::MemoryMapping::ReadOnly };
}
void Board::Bus_WrittenByte_Acia(EightBit::EventArgs&) {
updateAciaPins(EightBit::Chip::Low);
if (ACIA().selected()) {
ACIA().DATA() = peek(ADDRESS());
accessAcia();
}
}
void Board::Bus_ReadingByte_Acia(EightBit::EventArgs&) {
updateAciaPins(EightBit::Chip::High);
if (accessAcia())
poke(ADDRESS(), ACIA().DATA());
return { m_rom, 0xc000, EightBit::Chip::Mask16, EightBit::MemoryMapping::ReadOnly };
}
void Board::updateAciaPins(const EightBit::Chip::PinLevel rw) {
@ -102,30 +116,6 @@ void Board::updateAciaPins(const EightBit::Chip::PinLevel rw) {
ACIA().match(ACIA().CS2(), ADDRESS().word & EightBit::Chip::Bit14);
}
void Board::Cpu_ExecutedInstruction_Terminator(EightBit::mc6809&) {
assert(CPU().cycles() > 0);
m_totalCycleCount += CPU().cycles();
if (m_totalCycleCount > Configuration::TerminationCycles)
powerOff();
}
void Board::Cpu_ExecutedInstruction_Acia(EightBit::mc6809&) {
assert(CPU().cycles() > 0);
m_frameCycleCount -= CPU().cycles();
if (m_frameCycleCount < 0) {
if (_kbhit()) {
ACIA().RDR() = _getch();
ACIA().markReceiveStarting();
}
m_frameCycleCount = Configuration::FrameCycleInterval;
}
}
void Board::Acia_Transmitting(EightBit::EventArgs&) {
std::cout << ACIA().TDR();
ACIA().markTransmitComplete();
}
bool Board::accessAcia() {
ACIA().raise(ACIA().E());
const bool accessed = ACIA().tick();

27
MC6809/test/Board.h
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@ -35,8 +35,8 @@ private:
EightBit::mc6850 m_acia;
EightBit::mc6809 m_cpu;
EightBit::Disassembly m_disassembler;
EightBit::mc6809 m_cpu = *this;
EightBit::Disassembly m_disassembler = { *this, m_cpu };
uint64_t m_totalCycleCount = 0UL;
int64_t m_frameCycleCount = 0L;
@ -45,28 +45,9 @@ private:
EightBit::register16_t m_disassembleAt = 0x0000;
bool m_ignoreDisassembly = false;
// CPU events
void Cpu_ExecutingInstruction_Debug(EightBit::mc6809&);
void Cpu_ExecutedInstruction_Debug(EightBit::mc6809&);
void Cpu_ExecutedInstruction_Terminator(EightBit::mc6809&);
void Cpu_ExecutedInstruction_Acia(EightBit::mc6809&);
// Bus events
// Allows us to marshal data from memory -> ACIA
void Bus_WrittenByte_Acia(EightBit::EventArgs&);
// Allows us to marshal data from ACIA -> memory
void Bus_ReadingByte_Acia(EightBit::EventArgs&);
// ACIA events
// Allows us to catch a byte being transmitted
void Acia_Transmitting(EightBit::EventArgs&);
// Use the bus data to update the ACIA access/address pins
void updateAciaPinsRead() { updateAciaPins(EightBit::Chip::PinLevel::High); }
void updateAciaPinsWrite() { updateAciaPins(EightBit::Chip::PinLevel::Low); }
void updateAciaPins(EightBit::Chip::PinLevel rw);
bool accessAcia();

3
MC6809/test/Configuration.h
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@ -2,9 +2,8 @@
#include <cstdint>
#include <string>
#include <Register.h>
class Configuration {
class Configuration final {
public:
static constexpr uint64_t CyclesPerSecond = 2 * 1024 * 1024;
static constexpr uint64_t FrameCycleInterval = CyclesPerSecond / 60;