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90 lines
2.1 KiB
C++
90 lines
2.1 KiB
C++
//
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// Commodore1540.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 05/07/2016.
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// Copyright © 2016 Thomas Harte. All rights reserved.
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//
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#include "Commodore1540.hpp"
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#include <string.h>
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using namespace Commodore::C1540;
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Machine::Machine()
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{
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_serialPortVIA.reset(new SerialPortVIA);
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_serialPort.reset(new SerialPort);
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_serialPort->set_serial_port_via(_serialPortVIA);
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_serialPortVIA->set_serial_port(_serialPort);
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_serialPortVIA->set_delegate(this);
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_driveVIA.set_delegate(this);
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}
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void Machine::set_serial_bus(std::shared_ptr<::Commodore::Serial::Bus> serial_bus)
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{
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_serialPort->set_serial_bus(serial_bus);
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serial_bus->add_port(_serialPort);
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}
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unsigned int Machine::perform_bus_operation(CPU6502::BusOperation operation, uint16_t address, uint8_t *value)
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{
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/* static bool log = false;
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if(operation == CPU6502::BusOperation::ReadOpcode)
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{
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log = (address >= 0xE85B && address <= 0xE907) || (address >= 0xE9C9 && address <= 0xEA2D);
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if(log) printf("\n%04x: ", address);
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}
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if(log) printf("[%c %04x] ", isReadOperation(operation) ? 'r' : 'w', address);*/
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if(address < 0x800)
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{
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if(isReadOperation(operation))
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*value = _ram[address];
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else
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_ram[address] = *value;
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}
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else if(address >= 0xc000)
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{
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if(isReadOperation(operation))
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*value = _rom[address & 0x3fff];
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}
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else if(address >= 0x1800 && address <= 0x180f)
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{
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if(address == 0x1805)
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{
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printf("Timer\n");
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}
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if(isReadOperation(operation))
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*value = _serialPortVIA->get_register(address);
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else
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_serialPortVIA->set_register(address, *value);
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}
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else if(address >= 0x1c00 && address <= 0x1c0f)
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{
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if(isReadOperation(operation))
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*value = _driveVIA.get_register(address);
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else
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_driveVIA.set_register(address, *value);
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}
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_serialPortVIA->run_for_half_cycles(2);
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_driveVIA.run_for_half_cycles(2);
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return 1;
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}
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void Machine::set_rom(const uint8_t *rom)
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{
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memcpy(_rom, rom, sizeof(_rom));
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}
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#pragma mark - 6522 delegate
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void Machine::mos6522_did_change_interrupt_status(void *mos6522)
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{
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set_irq_line(_serialPortVIA->get_interrupt_line() || _driveVIA.get_interrupt_line());
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}
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