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c1bae49a92
Logic being: name these things for the bus action they model, not the effect they have.
824 lines
26 KiB
C++
824 lines
26 KiB
C++
//
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// MSX.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 24/11/2017.
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// Copyright 2017 Thomas Harte. All rights reserved.
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//
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#include "MSX.hpp"
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#include <algorithm>
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#include "DiskROM.hpp"
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#include "Keyboard.hpp"
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#include "ROMSlotHandler.hpp"
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#include "../../Analyser/Static/MSX/Cartridge.hpp"
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#include "Cartridges/ASCII8kb.hpp"
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#include "Cartridges/ASCII16kb.hpp"
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#include "Cartridges/Konami.hpp"
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#include "Cartridges/KonamiWithSCC.hpp"
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#include "../../Processors/Z80/Z80.hpp"
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#include "../../Components/1770/1770.hpp"
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#include "../../Components/9918/9918.hpp"
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#include "../../Components/8255/i8255.hpp"
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#include "../../Components/AudioToggle/AudioToggle.hpp"
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#include "../../Components/AY38910/AY38910.hpp"
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#include "../../Components/KonamiSCC/KonamiSCC.hpp"
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#include "../../Storage/Tape/Parsers/MSX.hpp"
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#include "../../Storage/Tape/Tape.hpp"
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#include "../../Activity/Source.hpp"
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#include "../CRTMachine.hpp"
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#include "../JoystickMachine.hpp"
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#include "../MediaTarget.hpp"
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#include "../KeyboardMachine.hpp"
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#include "../../Outputs/Log.hpp"
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#include "../../Outputs/Speaker/Implementation/CompoundSource.hpp"
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#include "../../Outputs/Speaker/Implementation/LowpassSpeaker.hpp"
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#include "../../Outputs/Speaker/Implementation/SampleSource.hpp"
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#include "../../Configurable/StandardOptions.hpp"
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#include "../../ClockReceiver/ForceInline.hpp"
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#include "../../ClockReceiver/JustInTime.hpp"
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#include "../../Analyser/Static/MSX/Target.hpp"
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namespace MSX {
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std::vector<std::unique_ptr<Configurable::Option>> get_options() {
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return Configurable::standard_options(
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static_cast<Configurable::StandardOptions>(Configurable::DisplayRGB | Configurable::DisplaySVideo | Configurable::DisplayCompositeColour | Configurable::QuickLoadTape)
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);
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}
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class AYPortHandler: public GI::AY38910::PortHandler {
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public:
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AYPortHandler(Storage::Tape::BinaryTapePlayer &tape_player) : tape_player_(tape_player) {
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joysticks_.emplace_back(new Joystick);
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joysticks_.emplace_back(new Joystick);
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}
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void set_port_output(bool port_b, uint8_t value) {
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if(port_b) {
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// Bits 0-3: touchpad handshaking (?)
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// Bit 4-5: monostable timer pulses
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// Bit 6: joystick select
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selected_joystick_ = (value >> 6) & 1;
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// Bit 7: code LED, if any
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}
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}
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uint8_t get_port_input(bool port_b) {
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if(!port_b) {
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// Bits 0-5: Joystick (up, down, left, right, A, B)
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// Bit 6: keyboard switch (not universal)
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// Bit 7: tape input
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return
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(static_cast<Joystick *>(joysticks_[selected_joystick_].get())->get_state() & 0x3f) |
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0x40 |
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(tape_player_.get_input() ? 0x00 : 0x80);
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}
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return 0xff;
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}
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const std::vector<std::unique_ptr<Inputs::Joystick>> &get_joysticks() {
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return joysticks_;
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}
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private:
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Storage::Tape::BinaryTapePlayer &tape_player_;
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std::vector<std::unique_ptr<Inputs::Joystick>> joysticks_;
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size_t selected_joystick_ = 0;
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class Joystick: public Inputs::ConcreteJoystick {
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public:
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Joystick() :
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ConcreteJoystick({
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Input(Input::Up),
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Input(Input::Down),
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Input(Input::Left),
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Input(Input::Right),
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Input(Input::Fire, 0),
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Input(Input::Fire, 1),
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}) {}
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void did_set_input(const Input &input, bool is_active) override {
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uint8_t mask = 0;
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switch(input.type) {
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default: return;
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case Input::Up: mask = 0x01; break;
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case Input::Down: mask = 0x02; break;
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case Input::Left: mask = 0x04; break;
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case Input::Right: mask = 0x08; break;
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case Input::Fire:
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if(input.info.control.index >= 2) return;
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mask = input.info.control.index ? 0x20 : 0x10;
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break;
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}
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if(is_active) state_ &= ~mask; else state_ |= mask;
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}
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uint8_t get_state() {
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return state_;
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}
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private:
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uint8_t state_ = 0xff;
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};
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};
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class ConcreteMachine:
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public Machine,
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public CPU::Z80::BusHandler,
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public CRTMachine::Machine,
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public MediaTarget::Machine,
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public KeyboardMachine::MappedMachine,
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public Configurable::Device,
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public JoystickMachine::Machine,
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public MemoryMap,
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public ClockingHint::Observer,
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public Activity::Source {
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public:
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using Target = Analyser::Static::MSX::Target;
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ConcreteMachine(const Target &target, const ROMMachine::ROMFetcher &rom_fetcher):
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z80_(*this),
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vdp_(TI::TMS::TMS9918A),
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i8255_(i8255_port_handler_),
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ay_(GI::AY38910::Personality::AY38910, audio_queue_),
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audio_toggle_(audio_queue_),
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scc_(audio_queue_),
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mixer_(ay_, audio_toggle_, scc_),
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speaker_(mixer_),
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tape_player_(3579545 * 2),
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i8255_port_handler_(*this, audio_toggle_, tape_player_),
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ay_port_handler_(tape_player_) {
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set_clock_rate(3579545);
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std::memset(unpopulated_, 0xff, sizeof(unpopulated_));
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clear_all_keys();
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ay_.set_port_handler(&ay_port_handler_);
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speaker_.set_input_rate(3579545.0f / 2.0f);
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tape_player_.set_clocking_hint_observer(this);
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// Set the AY to 50% of available volume, the toggle to 10% and leave 40% for an SCC.
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mixer_.set_relative_volumes({0.5f, 0.1f, 0.4f});
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// Install the proper TV standard and select an ideal BIOS name.
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const std::string machine_name = "MSX";
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std::vector<ROMMachine::ROM> required_roms = {
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{machine_name, "any MSX BIOS", "msx.rom", 32*1024, 0x94ee12f3}
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};
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bool is_ntsc = true;
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uint8_t character_generator = 1; /* 0 = Japan, 1 = USA, etc, 2 = USSR */
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uint8_t date_format = 1; /* 0 = Y/M/D, 1 = M/D/Y, 2 = D/M/Y */
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uint8_t keyboard = 1; /* 0 = Japan, 1 = USA, 2 = France, 3 = UK, 4 = Germany, 5 = USSR, 6 = Spain */
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// TODO: CRCs below are incomplete, at best.
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switch(target.region) {
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case Target::Region::Japan:
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required_roms.emplace_back(machine_name, "a Japanese MSX BIOS", "msx-japanese.rom", 32*1024, 0xee229390);
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vdp_->set_tv_standard(TI::TMS::TVStandard::NTSC);
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is_ntsc = true;
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character_generator = 0;
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date_format = 0;
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break;
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case Target::Region::USA:
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required_roms.emplace_back(machine_name, "an American MSX BIOS", "msx-american.rom", 32*1024, 0);
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vdp_->set_tv_standard(TI::TMS::TVStandard::NTSC);
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is_ntsc = true;
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character_generator = 1;
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date_format = 1;
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break;
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case Target::Region::Europe:
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required_roms.emplace_back(machine_name, "a European MSX BIOS", "msx-european.rom", 32*1024, 0);
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vdp_->set_tv_standard(TI::TMS::TVStandard::PAL);
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is_ntsc = false;
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character_generator = 1;
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date_format = 2;
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break;
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}
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// Fetch the necessary ROMs; try the region-specific ROM first,
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// but failing that fall back on patching the main one.
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size_t disk_index = 0;
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if(target.has_disk_drive) {
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disk_index = required_roms.size();
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required_roms.emplace_back(machine_name, "the MSX-DOS ROM", "disk.rom", 16*1024, 0x721f61df);
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}
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const auto roms = rom_fetcher(required_roms);
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if((!roms[0] && !roms[1]) || (target.has_disk_drive && !roms[2])) {
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throw ROMMachine::Error::MissingROMs;
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}
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// Figure out which BIOS to use, either a specific one or the generic
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// one appropriately patched.
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if(roms[1]) {
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memory_slots_[0].source = std::move(*roms[1]);
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memory_slots_[0].source.resize(32768);
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} else {
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memory_slots_[0].source = std::move(*roms[0]);
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memory_slots_[0].source.resize(32768);
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memory_slots_[0].source[0x2b] = uint8_t(
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(is_ntsc ? 0x00 : 0x80) |
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(date_format << 4) |
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character_generator
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);
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memory_slots_[0].source[0x2c] = keyboard;
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}
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for(size_t c = 0; c < 8; ++c) {
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for(size_t slot = 0; slot < 3; ++slot) {
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memory_slots_[slot].read_pointers[c] = unpopulated_;
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memory_slots_[slot].write_pointers[c] = scratch_;
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}
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memory_slots_[3].read_pointers[c] =
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memory_slots_[3].write_pointers[c] = &ram_[c * 8192];
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}
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map(0, 0, 0, 32768);
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page_memory(0);
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// Add a disk cartridge if any disks were supplied.
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if(target.has_disk_drive) {
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memory_slots_[2].set_handler(new DiskROM(memory_slots_[2].source));
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memory_slots_[2].source = std::move(*roms[disk_index]);
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memory_slots_[2].source.resize(16384);
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map(2, 0, 0x4000, 0x2000);
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unmap(2, 0x6000, 0x2000);
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}
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// Insert the media.
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insert_media(target.media);
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// Type whatever has been requested.
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if(!target.loading_command.empty()) {
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type_string(target.loading_command);
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}
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}
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~ConcreteMachine() {
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audio_queue_.flush();
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}
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void set_scan_target(Outputs::Display::ScanTarget *scan_target) override {
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vdp_->set_scan_target(scan_target);
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}
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void set_display_type(Outputs::Display::DisplayType display_type) override {
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vdp_->set_display_type(display_type);
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}
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Outputs::Speaker::Speaker *get_speaker() override {
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return &speaker_;
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}
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void run_for(const Cycles cycles) override {
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z80_.run_for(cycles);
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}
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float get_confidence() override {
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if(performed_unmapped_access_ || pc_zero_accesses_ > 1) return 0.0f;
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if(memory_slots_[1].handler) {
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return memory_slots_[1].handler->get_confidence();
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}
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return 0.5f;
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}
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std::string debug_type() override {
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if(memory_slots_[1].handler) {
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return "MSX:" + memory_slots_[1].handler->debug_type();
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}
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return "MSX";
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}
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bool insert_media(const Analyser::Static::Media &media) override {
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if(!media.cartridges.empty()) {
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const auto &segment = media.cartridges.front()->get_segments().front();
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memory_slots_[1].source = segment.data;
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map(1, 0, static_cast<uint16_t>(segment.start_address), std::min(segment.data.size(), 65536 - segment.start_address));
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auto msx_cartridge = dynamic_cast<Analyser::Static::MSX::Cartridge *>(media.cartridges.front().get());
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if(msx_cartridge) {
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switch(msx_cartridge->type) {
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default: break;
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case Analyser::Static::MSX::Cartridge::Konami:
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memory_slots_[1].set_handler(new Cartridge::KonamiROMSlotHandler(*this, 1));
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break;
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case Analyser::Static::MSX::Cartridge::KonamiWithSCC:
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memory_slots_[1].set_handler(new Cartridge::KonamiWithSCCROMSlotHandler(*this, 1, scc_));
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break;
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case Analyser::Static::MSX::Cartridge::ASCII8kb:
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memory_slots_[1].set_handler(new Cartridge::ASCII8kbROMSlotHandler(*this, 1));
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break;
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case Analyser::Static::MSX::Cartridge::ASCII16kb:
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memory_slots_[1].set_handler(new Cartridge::ASCII16kbROMSlotHandler(*this, 1));
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break;
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}
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}
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}
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if(!media.tapes.empty()) {
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tape_player_.set_tape(media.tapes.front());
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}
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if(!media.disks.empty()) {
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DiskROM *disk_rom = get_disk_rom();
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if(disk_rom) {
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size_t drive = 0;
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for(auto &disk : media.disks) {
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disk_rom->set_disk(disk, drive);
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drive++;
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if(drive == 2) break;
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}
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}
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}
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set_use_fast_tape();
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return true;
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}
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void type_string(const std::string &string) override final {
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std::transform(
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string.begin(),
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string.end(),
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std::back_inserter(input_text_),
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[](unsigned char c) -> unsigned char { return (c == '\n') ? '\r' : c; }
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);
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}
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// MARK: MSX::MemoryMap
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void map(int slot, std::size_t source_address, uint16_t destination_address, std::size_t length) override {
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assert(!(destination_address & 8191));
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assert(!(length & 8191));
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assert(static_cast<std::size_t>(destination_address) + length <= 65536);
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for(std::size_t c = 0; c < (length >> 13); ++c) {
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if(memory_slots_[slot].wrapping_strategy == ROMSlotHandler::WrappingStrategy::Repeat) source_address %= memory_slots_[slot].source.size();
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memory_slots_[slot].read_pointers[(destination_address >> 13) + c] =
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(source_address < memory_slots_[slot].source.size()) ? &memory_slots_[slot].source[source_address] : unpopulated_;
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source_address += 8192;
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}
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page_memory(paged_memory_);
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}
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void unmap(int slot, uint16_t destination_address, std::size_t length) override {
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assert(!(destination_address & 8191));
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assert(!(length & 8191));
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assert(static_cast<std::size_t>(destination_address) + length <= 65536);
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for(std::size_t c = 0; c < (length >> 13); ++c) {
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memory_slots_[slot].read_pointers[(destination_address >> 13) + c] = nullptr;
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}
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page_memory(paged_memory_);
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}
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// MARK: Ordinary paging.
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void page_memory(uint8_t value) {
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paged_memory_ = value;
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for(std::size_t c = 0; c < 8; c += 2) {
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read_pointers_[c] = memory_slots_[value & 3].read_pointers[c];
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write_pointers_[c] = memory_slots_[value & 3].write_pointers[c];
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read_pointers_[c+1] = memory_slots_[value & 3].read_pointers[c+1];
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write_pointers_[c+1] = memory_slots_[value & 3].write_pointers[c+1];
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value >>= 2;
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}
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set_use_fast_tape();
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}
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// MARK: Z80::BusHandler
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forceinline HalfCycles perform_machine_cycle(const CPU::Z80::PartialMachineCycle &cycle) {
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// Per the best information I currently have, the MSX inserts an extra cycle into each opcode read,
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// but otherwise runs without pause.
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const HalfCycles addition((cycle.operation == CPU::Z80::PartialMachineCycle::ReadOpcode) ? 2 : 0);
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const HalfCycles total_length = addition + cycle.length;
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vdp_ += total_length;
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time_since_ay_update_ += total_length;
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memory_slots_[0].cycles_since_update += total_length;
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memory_slots_[1].cycles_since_update += total_length;
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memory_slots_[2].cycles_since_update += total_length;
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memory_slots_[3].cycles_since_update += total_length;
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if(cycle.is_terminal()) {
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uint16_t address = cycle.address ? *cycle.address : 0x0000;
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switch(cycle.operation) {
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case CPU::Z80::PartialMachineCycle::ReadOpcode:
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if(use_fast_tape_) {
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if(address == 0x1a63) {
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// TAPION
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// Enable the tape motor.
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i8255_.write(0xab, 0x8);
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// Disable interrupts.
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z80_.set_value_of_register(CPU::Z80::Register::IFF1, 0);
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z80_.set_value_of_register(CPU::Z80::Register::IFF2, 0);
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// Use the parser to find a header, and if one is found then populate
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// LOWLIM and WINWID, and reset carry. Otherwise set carry.
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using Parser = Storage::Tape::MSX::Parser;
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std::unique_ptr<Parser::FileSpeed> new_speed = Parser::find_header(tape_player_);
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if(new_speed) {
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ram_[0xfca4] = new_speed->minimum_start_bit_duration;
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ram_[0xfca5] = new_speed->low_high_disrimination_duration;
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z80_.set_value_of_register(CPU::Z80::Register::Flags, 0);
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} else {
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z80_.set_value_of_register(CPU::Z80::Register::Flags, 1);
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}
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// RET.
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*cycle.value = 0xc9;
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break;
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}
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if(address == 0x1abc) {
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// TAPIN
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// Grab the current values of LOWLIM and WINWID.
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using Parser = Storage::Tape::MSX::Parser;
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Parser::FileSpeed tape_speed;
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tape_speed.minimum_start_bit_duration = ram_[0xfca4];
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tape_speed.low_high_disrimination_duration = ram_[0xfca5];
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// Ask the tape parser to grab a byte.
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int next_byte = Parser::get_byte(tape_speed, tape_player_);
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// If a byte was found, return it with carry unset. Otherwise set carry to
|
|
// indicate error.
|
|
if(next_byte >= 0) {
|
|
z80_.set_value_of_register(CPU::Z80::Register::A, static_cast<uint16_t>(next_byte));
|
|
z80_.set_value_of_register(CPU::Z80::Register::Flags, 0);
|
|
} else {
|
|
z80_.set_value_of_register(CPU::Z80::Register::Flags, 1);
|
|
}
|
|
|
|
// RET.
|
|
*cycle.value = 0xc9;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if(!address) {
|
|
pc_zero_accesses_++;
|
|
}
|
|
if(read_pointers_[address >> 13] == unpopulated_) {
|
|
performed_unmapped_access_ = true;
|
|
}
|
|
pc_address_ = address; // This is retained so as to be able to name the source of an access to cartridge handlers.
|
|
case CPU::Z80::PartialMachineCycle::Read:
|
|
if(read_pointers_[address >> 13]) {
|
|
*cycle.value = read_pointers_[address >> 13][address & 8191];
|
|
} else {
|
|
int slot_hit = (paged_memory_ >> ((address >> 14) * 2)) & 3;
|
|
memory_slots_[slot_hit].handler->run_for(memory_slots_[slot_hit].cycles_since_update.flush<HalfCycles>());
|
|
*cycle.value = memory_slots_[slot_hit].handler->read(address);
|
|
}
|
|
break;
|
|
|
|
case CPU::Z80::PartialMachineCycle::Write: {
|
|
write_pointers_[address >> 13][address & 8191] = *cycle.value;
|
|
|
|
int slot_hit = (paged_memory_ >> ((address >> 14) * 2)) & 3;
|
|
if(memory_slots_[slot_hit].handler) {
|
|
update_audio();
|
|
memory_slots_[slot_hit].handler->run_for(memory_slots_[slot_hit].cycles_since_update.flush<HalfCycles>());
|
|
memory_slots_[slot_hit].handler->write(address, *cycle.value, read_pointers_[pc_address_ >> 13] != memory_slots_[0].read_pointers[pc_address_ >> 13]);
|
|
}
|
|
} break;
|
|
|
|
case CPU::Z80::PartialMachineCycle::Input:
|
|
switch(address & 0xff) {
|
|
case 0x98: case 0x99:
|
|
*cycle.value = vdp_->read(address);
|
|
z80_.set_interrupt_line(vdp_->get_interrupt_line());
|
|
time_until_interrupt_ = vdp_->get_time_until_interrupt();
|
|
break;
|
|
|
|
case 0xa2:
|
|
update_audio();
|
|
ay_.set_control_lines(static_cast<GI::AY38910::ControlLines>(GI::AY38910::BC2 | GI::AY38910::BC1));
|
|
*cycle.value = ay_.get_data_output();
|
|
ay_.set_control_lines(static_cast<GI::AY38910::ControlLines>(0));
|
|
break;
|
|
|
|
case 0xa8: case 0xa9:
|
|
case 0xaa: case 0xab:
|
|
*cycle.value = i8255_.read(address);
|
|
break;
|
|
|
|
default:
|
|
*cycle.value = 0xff;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case CPU::Z80::PartialMachineCycle::Output: {
|
|
const int port = address & 0xff;
|
|
switch(port) {
|
|
case 0x98: case 0x99:
|
|
vdp_->write(address, *cycle.value);
|
|
z80_.set_interrupt_line(vdp_->get_interrupt_line());
|
|
time_until_interrupt_ = vdp_->get_time_until_interrupt();
|
|
break;
|
|
|
|
case 0xa0: case 0xa1:
|
|
update_audio();
|
|
ay_.set_control_lines(static_cast<GI::AY38910::ControlLines>(GI::AY38910::BDIR | GI::AY38910::BC2 | ((port == 0xa0) ? GI::AY38910::BC1 : 0)));
|
|
ay_.set_data_input(*cycle.value);
|
|
ay_.set_control_lines(static_cast<GI::AY38910::ControlLines>(0));
|
|
break;
|
|
|
|
case 0xa8: case 0xa9:
|
|
case 0xaa: case 0xab:
|
|
i8255_.write(address, *cycle.value);
|
|
break;
|
|
|
|
case 0xfc: case 0xfd: case 0xfe: case 0xff:
|
|
// printf("RAM banking %02x: %02x\n", port, *cycle.value);
|
|
break;
|
|
}
|
|
} break;
|
|
|
|
case CPU::Z80::PartialMachineCycle::Interrupt:
|
|
*cycle.value = 0xff;
|
|
|
|
// Take this as a convenient moment to jump into the keyboard buffer, if desired.
|
|
if(!input_text_.empty()) {
|
|
// The following are KEYBUF per the Red Book; its address and its definition as DEFS 40.
|
|
const int buffer_start = 0xfbf0;
|
|
const int buffer_size = 40;
|
|
|
|
// Also from the Red Book: GETPNT is at F3FAH and PUTPNT is at F3F8H.
|
|
int read_address = ram_[0xf3fa] | (ram_[0xf3fb] << 8);
|
|
int write_address = ram_[0xf3f8] | (ram_[0xf3f9] << 8);
|
|
|
|
// Write until either the string is exhausted or the write_pointer is immediately
|
|
// behind the read pointer; temporarily map write_address and read_address into
|
|
// buffer-relative values.
|
|
std::size_t characters_written = 0;
|
|
write_address -= buffer_start;
|
|
read_address -= buffer_start;
|
|
while(characters_written < input_text_.size()) {
|
|
const int next_write_address = (write_address + 1) % buffer_size;
|
|
if(next_write_address == read_address) break;
|
|
ram_[write_address + buffer_start] = static_cast<uint8_t>(input_text_[characters_written]);
|
|
++characters_written;
|
|
write_address = next_write_address;
|
|
}
|
|
input_text_.erase(input_text_.begin(), input_text_.begin() + static_cast<std::string::difference_type>(characters_written));
|
|
|
|
// Map the write address back into absolute terms and write it out again as PUTPNT.
|
|
write_address += buffer_start;
|
|
ram_[0xf3f8] = static_cast<uint8_t>(write_address);
|
|
ram_[0xf3f9] = static_cast<uint8_t>(write_address >> 8);
|
|
}
|
|
break;
|
|
|
|
default: break;
|
|
}
|
|
}
|
|
|
|
if(!tape_player_is_sleeping_)
|
|
tape_player_.run_for(int(cycle.length.as_integral()));
|
|
|
|
if(time_until_interrupt_ > 0) {
|
|
time_until_interrupt_ -= total_length;
|
|
if(time_until_interrupt_ <= HalfCycles(0)) {
|
|
z80_.set_interrupt_line(true, time_until_interrupt_);
|
|
}
|
|
}
|
|
return addition;
|
|
}
|
|
|
|
void flush() {
|
|
vdp_.flush();
|
|
update_audio();
|
|
audio_queue_.perform();
|
|
}
|
|
|
|
void set_keyboard_line(int line) {
|
|
selected_key_line_ = line;
|
|
}
|
|
|
|
uint8_t read_keyboard() {
|
|
return key_states_[selected_key_line_];
|
|
}
|
|
|
|
void clear_all_keys() override {
|
|
std::memset(key_states_, 0xff, sizeof(key_states_));
|
|
}
|
|
|
|
void set_key_state(uint16_t key, bool is_pressed) override {
|
|
int mask = 1 << (key & 7);
|
|
int line = key >> 4;
|
|
if(is_pressed) key_states_[line] &= ~mask; else key_states_[line] |= mask;
|
|
}
|
|
|
|
KeyboardMapper *get_keyboard_mapper() override {
|
|
return &keyboard_mapper_;
|
|
}
|
|
|
|
// MARK: - Configuration options.
|
|
std::vector<std::unique_ptr<Configurable::Option>> get_options() override {
|
|
return MSX::get_options();
|
|
}
|
|
|
|
void set_selections(const Configurable::SelectionSet &selections_by_option) override {
|
|
bool quickload;
|
|
if(Configurable::get_quick_load_tape(selections_by_option, quickload)) {
|
|
allow_fast_tape_ = quickload;
|
|
set_use_fast_tape();
|
|
}
|
|
|
|
Configurable::Display display;
|
|
if(Configurable::get_display(selections_by_option, display)) {
|
|
set_video_signal_configurable(display);
|
|
}
|
|
}
|
|
|
|
Configurable::SelectionSet get_accurate_selections() override {
|
|
Configurable::SelectionSet selection_set;
|
|
Configurable::append_quick_load_tape_selection(selection_set, false);
|
|
Configurable::append_display_selection(selection_set, Configurable::Display::CompositeColour);
|
|
return selection_set;
|
|
}
|
|
|
|
Configurable::SelectionSet get_user_friendly_selections() override {
|
|
Configurable::SelectionSet selection_set;
|
|
Configurable::append_quick_load_tape_selection(selection_set, true);
|
|
Configurable::append_display_selection(selection_set, Configurable::Display::RGB);
|
|
return selection_set;
|
|
}
|
|
|
|
// MARK: - Sleeper
|
|
void set_component_prefers_clocking(ClockingHint::Source *component, ClockingHint::Preference clocking) override {
|
|
tape_player_is_sleeping_ = tape_player_.preferred_clocking() == ClockingHint::Preference::None;
|
|
set_use_fast_tape();
|
|
}
|
|
|
|
// MARK: - Activity::Source
|
|
void set_activity_observer(Activity::Observer *observer) override {
|
|
DiskROM *disk_rom = get_disk_rom();
|
|
if(disk_rom) {
|
|
disk_rom->set_activity_observer(observer);
|
|
}
|
|
i8255_port_handler_.set_activity_observer(observer);
|
|
}
|
|
|
|
// MARK: - Joysticks
|
|
const std::vector<std::unique_ptr<Inputs::Joystick>> &get_joysticks() override {
|
|
return ay_port_handler_.get_joysticks();
|
|
}
|
|
|
|
private:
|
|
DiskROM *get_disk_rom() {
|
|
return dynamic_cast<DiskROM *>(memory_slots_[2].handler.get());
|
|
}
|
|
void update_audio() {
|
|
speaker_.run_for(audio_queue_, time_since_ay_update_.divide_cycles(Cycles(2)));
|
|
}
|
|
|
|
class i8255PortHandler: public Intel::i8255::PortHandler {
|
|
public:
|
|
i8255PortHandler(ConcreteMachine &machine, Audio::Toggle &audio_toggle, Storage::Tape::BinaryTapePlayer &tape_player) :
|
|
machine_(machine), audio_toggle_(audio_toggle), tape_player_(tape_player) {}
|
|
|
|
void set_value(int port, uint8_t value) {
|
|
switch(port) {
|
|
case 0: machine_.page_memory(value); break;
|
|
case 2: {
|
|
// TODO:
|
|
// b6 caps lock LED
|
|
// b5 audio output
|
|
|
|
// b4: cassette motor relay
|
|
tape_player_.set_motor_control(!(value & 0x10));
|
|
if(activity_observer_) activity_observer_->set_led_status("Tape motor", !(value & 0x10));
|
|
|
|
// b7: keyboard click
|
|
bool new_audio_level = !!(value & 0x80);
|
|
if(audio_toggle_.get_output() != new_audio_level) {
|
|
machine_.update_audio();
|
|
audio_toggle_.set_output(new_audio_level);
|
|
}
|
|
|
|
// b0-b3: keyboard line
|
|
machine_.set_keyboard_line(value & 0xf);
|
|
} break;
|
|
default: LOG("Unrecognised: MSX set 8255 output port " << port << " to value " << PADHEX(2) << value); break;
|
|
}
|
|
}
|
|
|
|
uint8_t get_value(int port) {
|
|
if(port == 1) {
|
|
return machine_.read_keyboard();
|
|
} else LOG("MSX attempted to read from 8255 port " << port);
|
|
return 0xff;
|
|
}
|
|
|
|
void set_activity_observer(Activity::Observer *observer) {
|
|
activity_observer_ = observer;
|
|
if(activity_observer_) {
|
|
activity_observer_->register_led("Tape motor");
|
|
activity_observer_->set_led_status("Tape motor", tape_player_.get_motor_control());
|
|
}
|
|
}
|
|
|
|
private:
|
|
ConcreteMachine &machine_;
|
|
Audio::Toggle &audio_toggle_;
|
|
Storage::Tape::BinaryTapePlayer &tape_player_;
|
|
Activity::Observer *activity_observer_ = nullptr;
|
|
};
|
|
|
|
CPU::Z80::Processor<ConcreteMachine, false, false> z80_;
|
|
JustInTimeActor<TI::TMS::TMS9918> vdp_;
|
|
Intel::i8255::i8255<i8255PortHandler> i8255_;
|
|
|
|
Concurrency::DeferringAsyncTaskQueue audio_queue_;
|
|
GI::AY38910::AY38910 ay_;
|
|
Audio::Toggle audio_toggle_;
|
|
Konami::SCC scc_;
|
|
Outputs::Speaker::CompoundSource<GI::AY38910::AY38910, Audio::Toggle, Konami::SCC> mixer_;
|
|
Outputs::Speaker::LowpassSpeaker<Outputs::Speaker::CompoundSource<GI::AY38910::AY38910, Audio::Toggle, Konami::SCC>> speaker_;
|
|
|
|
Storage::Tape::BinaryTapePlayer tape_player_;
|
|
bool tape_player_is_sleeping_ = false;
|
|
bool allow_fast_tape_ = false;
|
|
bool use_fast_tape_ = false;
|
|
void set_use_fast_tape() {
|
|
use_fast_tape_ = !tape_player_is_sleeping_ && allow_fast_tape_ && tape_player_.has_tape() && !(paged_memory_&3);
|
|
}
|
|
|
|
i8255PortHandler i8255_port_handler_;
|
|
AYPortHandler ay_port_handler_;
|
|
|
|
uint8_t paged_memory_ = 0;
|
|
uint8_t *read_pointers_[8];
|
|
uint8_t *write_pointers_[8];
|
|
|
|
struct MemorySlots {
|
|
uint8_t *read_pointers[8];
|
|
uint8_t *write_pointers[8];
|
|
|
|
void set_handler(ROMSlotHandler *slot_handler) {
|
|
handler.reset(slot_handler);
|
|
wrapping_strategy = handler->wrapping_strategy();
|
|
}
|
|
|
|
std::unique_ptr<ROMSlotHandler> handler;
|
|
std::vector<uint8_t> source;
|
|
HalfCycles cycles_since_update;
|
|
ROMSlotHandler::WrappingStrategy wrapping_strategy = ROMSlotHandler::WrappingStrategy::Repeat;
|
|
} memory_slots_[4];
|
|
|
|
uint8_t ram_[65536];
|
|
uint8_t scratch_[8192];
|
|
uint8_t unpopulated_[8192];
|
|
|
|
HalfCycles time_since_ay_update_;
|
|
HalfCycles time_until_interrupt_;
|
|
|
|
uint8_t key_states_[16];
|
|
int selected_key_line_ = 0;
|
|
std::string input_text_;
|
|
|
|
MSX::KeyboardMapper keyboard_mapper_;
|
|
|
|
int pc_zero_accesses_ = 0;
|
|
bool performed_unmapped_access_ = false;
|
|
uint16_t pc_address_;
|
|
};
|
|
|
|
}
|
|
|
|
using namespace MSX;
|
|
|
|
Machine *Machine::MSX(const Analyser::Static::Target *target, const ROMMachine::ROMFetcher &rom_fetcher) {
|
|
using Target = Analyser::Static::MSX::Target;
|
|
const Target *const msx_target = dynamic_cast<const Target *>(target);
|
|
return new ConcreteMachine(*msx_target, rom_fetcher);
|
|
}
|
|
|
|
Machine::~Machine() {}
|