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123 lines
2.4 KiB
C++
123 lines
2.4 KiB
C++
//
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// Oric.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 11/10/2016.
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// Copyright © 2016 Thomas Harte. All rights reserved.
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//
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#include "Oric.hpp"
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using namespace Oric;
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Machine::Machine() : _cycles_since_video_update(0)
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{
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set_clock_rate(1000000);
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_via.tape.reset(new Storage::Tape::BinaryTapePlayer(1000000));
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_via.set_interrupt_delegate(this);
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_keyboard.reset(new Keyboard);
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_via.keyboard = _keyboard;
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clear_all_keys();
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_via.tape->set_delegate(this);
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}
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void Machine::configure_as_target(const StaticAnalyser::Target &target)
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{
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if(target.tapes.size())
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{
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_via.tape->set_tape(target.tapes.front());
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}
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}
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void Machine::set_rom(std::vector<uint8_t> data)
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{
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memcpy(_rom, data.data(), std::min(data.size(), sizeof(_rom)));
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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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if(address >= 0xc000)
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{
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if(isReadOperation(operation)) *value = _rom[address&16383];
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}
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else
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{
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if((address & 0xff00) == 0x0300)
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{
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if(isReadOperation(operation)) *value = _via.get_register(address);
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else _via.set_register(address, *value);
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}
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else
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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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{
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if(address >= 0x9800) update_video();
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_ram[address] = *value;
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}
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}
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}
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_via.run_for_half_cycles(2);
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_via.tape->run_for_cycles(1);
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_cycles_since_video_update++;
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return 1;
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}
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void Machine::synchronise()
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{
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update_video();
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_via.synchronise();
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}
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void Machine::update_video()
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{
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_videoOutput->run_for_cycles(_cycles_since_video_update);
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_cycles_since_video_update = 0;
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}
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void Machine::setup_output(float aspect_ratio)
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{
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_videoOutput.reset(new VideoOutput(_ram));
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_via.ay8910.reset(new GI::AY38910());
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_via.ay8910->set_clock_rate(1000000);
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}
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void Machine::close_output()
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{
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_videoOutput.reset();
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_via.ay8910.reset();
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}
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void Machine::mos6522_did_change_interrupt_status(void *mos6522)
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{
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set_irq_line(_via.get_interrupt_line());
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}
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void Machine::set_key_state(Key key, bool isPressed)
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{
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if(key == KeyNMI)
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{
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set_nmi_line(isPressed);
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}
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else
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{
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if(isPressed)
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_keyboard->rows[key >> 8] |= (key & 0xff);
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else
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_keyboard->rows[key >> 8] &= ~(key & 0xff);
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}
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}
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void Machine::clear_all_keys()
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{
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memset(_keyboard->rows, 0, sizeof(_keyboard->rows));
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}
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void Machine::tape_did_change_input(Storage::Tape::BinaryTapePlayer *tape_player)
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{
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// set CB1
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_via.set_control_line_input(VIA::Port::B, VIA::Line::One, tape_player->get_input());
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}
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