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99 lines
2.5 KiB
Plaintext
99 lines
2.5 KiB
Plaintext
//
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// Machine.m
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// ElectrEm
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//
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// Created by Thomas Harte on 29/06/2015.
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// Copyright © 2015 Thomas Harte. All rights reserved.
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//
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#import "TestMachine.h"
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#include <stdint.h>
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#include "CPU6502AllRAM.hpp"
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const uint8_t CSTestMachineJamOpcode = CPU6502::JamOpcode;
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class MachineJamHandler: public CPU6502::AllRAMProcessor::JamHandler {
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public:
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MachineJamHandler(CSTestMachine *targetMachine) {
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_targetMachine = targetMachine;
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}
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void processor_did_jam(CPU6502::AllRAMProcessor::Processor *processor, uint16_t address) override {
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[_targetMachine.jamHandler testMachine:_targetMachine didJamAtAddress:address];
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}
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private:
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CSTestMachine *_targetMachine;
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};
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@implementation CSTestMachine {
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CPU6502::AllRAMProcessor _processor;
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MachineJamHandler *_cppJamHandler;
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}
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- (uint8_t)valueForAddress:(uint16_t)address {
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uint8_t value;
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_processor.perform_bus_operation(CPU6502::BusOperation::Read, address, &value);
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return value;
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}
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- (void)setValue:(uint8_t)value forAddress:(uint16_t)address {
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_processor.perform_bus_operation(CPU6502::BusOperation::Write, address, &value);
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}
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- (void)returnFromSubroutine {
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_processor.return_from_subroutine();
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}
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- (CPU6502::Register)registerForRegister:(CSTestMachineRegister)reg {
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switch (reg) {
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case CSTestMachineRegisterProgramCounter: return CPU6502::Register::ProgramCounter;
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case CSTestMachineRegisterLastOperationAddress: return CPU6502::Register::LastOperationAddress;
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case CSTestMachineRegisterFlags: return CPU6502::Register::Flags;
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case CSTestMachineRegisterA: return CPU6502::Register::A;
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case CSTestMachineRegisterStackPointer: return CPU6502::Register::S;
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default: break;
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}
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}
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- (void)setValue:(uint16_t)value forRegister:(CSTestMachineRegister)reg {
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_processor.set_value_of_register([self registerForRegister:reg], value);
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}
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- (uint16_t)valueForRegister:(CSTestMachineRegister)reg {
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return _processor.get_value_of_register([self registerForRegister:reg]);
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}
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- (void)setData:(NSData *)data atAddress:(uint16_t)startAddress {
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_processor.set_data_at_address(startAddress, data.length, (const uint8_t *)data.bytes);
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}
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- (void)reset {
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_processor.reset();
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}
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- (void)runForNumberOfCycles:(int)cycles {
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_processor.run_for_cycles(cycles);
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}
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- (BOOL)isJammed {
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return _processor.is_jammed();
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}
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- (instancetype)init {
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self = [super init];
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if (self) {
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_cppJamHandler = new MachineJamHandler(self);
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_processor.set_jam_handler(_cppJamHandler);
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}
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return self;
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}
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- (void)dealloc {
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delete _cppJamHandler;
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}
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@end
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