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228 lines
7.3 KiB
C++
228 lines
7.3 KiB
C++
//
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// Vic20.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 04/06/2016.
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// Copyright © 2016 Thomas Harte. All rights reserved.
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//
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#ifndef Vic20_hpp
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#define Vic20_hpp
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#include "../../ConfigurationTarget.hpp"
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#include "../../CRTMachine.hpp"
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#include "../../Typer.hpp"
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#include "../../../Processors/6502/6502.hpp"
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#include "../../../Components/6560/6560.hpp"
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#include "../../../Components/6522/6522.hpp"
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#include "../SerialBus.hpp"
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#include "../1540/C1540.hpp"
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#include "../../../Storage/Tape/Tape.hpp"
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#include "../../../Storage/Disk/Disk.hpp"
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namespace Commodore {
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namespace Vic20 {
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enum ROMSlot {
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Kernel,
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BASIC,
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Characters,
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Drive
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};
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enum MemorySize {
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Default,
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ThreeKB,
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ThirtyTwoKB
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};
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enum Region {
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NTSC,
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PAL
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};
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#define key(line, mask) (((mask) << 3) | (line))
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enum Key: uint16_t {
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Key2 = key(7, 0x01), Key4 = key(7, 0x02), Key6 = key(7, 0x04), Key8 = key(7, 0x08),
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Key0 = key(7, 0x10), KeyDash = key(7, 0x20), KeyHome = key(7, 0x40), KeyF7 = key(7, 0x80),
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KeyQ = key(6, 0x01), KeyE = key(6, 0x02), KeyT = key(6, 0x04), KeyU = key(6, 0x08),
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KeyO = key(6, 0x10), KeyAt = key(6, 0x20), KeyUp = key(6, 0x40), KeyF5 = key(6, 0x80),
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KeyCBM = key(5, 0x01), KeyS = key(5, 0x02), KeyF = key(5, 0x04), KeyH = key(5, 0x08),
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KeyK = key(5, 0x10), KeyColon = key(5, 0x20), KeyEquals = key(5, 0x40), KeyF3 = key(5, 0x80),
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KeySpace = key(4, 0x01), KeyZ = key(4, 0x02), KeyC = key(4, 0x04), KeyB = key(4, 0x08),
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KeyM = key(4, 0x10), KeyFullStop = key(4, 0x20), KeyRShift = key(4, 0x40), KeyF1 = key(4, 0x80),
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KeyRunStop = key(3, 0x01), KeyLShift = key(3, 0x02), KeyX = key(3, 0x04), KeyV = key(3, 0x08),
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KeyN = key(3, 0x10), KeyComma = key(3, 0x20), KeySlash = key(3, 0x40), KeyDown = key(3, 0x80),
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KeyControl = key(2, 0x01), KeyA = key(2, 0x02), KeyD = key(2, 0x04), KeyG = key(2, 0x08),
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KeyJ = key(2, 0x10), KeyL = key(2, 0x20), KeySemicolon = key(2, 0x40), KeyRight = key(2, 0x80),
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KeyLeft = key(1, 0x01), KeyW = key(1, 0x02), KeyR = key(1, 0x04), KeyY = key(1, 0x08),
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KeyI = key(1, 0x10), KeyP = key(1, 0x20), KeyAsterisk = key(1, 0x40), KeyReturn = key(1, 0x80),
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Key1 = key(0, 0x01), Key3 = key(0, 0x02), Key5 = key(0, 0x04), Key7 = key(0, 0x08),
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Key9 = key(0, 0x10), KeyPlus = key(0, 0x20), KeyGBP = key(0, 0x40), KeyDelete = key(0, 0x80),
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};
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enum JoystickInput {
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Up = 0x04,
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Down = 0x08,
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Left = 0x10,
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Right = 0x80,
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Fire = 0x20
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};
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class UserPortVIA: public MOS::MOS6522<UserPortVIA>, public MOS::MOS6522IRQDelegate {
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public:
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UserPortVIA();
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using MOS6522IRQDelegate::set_interrupt_status;
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uint8_t get_port_input(Port port);
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void set_control_line_output(Port port, Line line, bool value);
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void set_serial_line_state(::Commodore::Serial::Line line, bool value);
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void set_joystick_state(JoystickInput input, bool value);
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void set_port_output(Port port, uint8_t value, uint8_t mask);
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void set_serial_port(std::shared_ptr<::Commodore::Serial::Port> serialPort);
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void set_tape(std::shared_ptr<Storage::Tape::BinaryTapePlayer> tape);
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private:
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uint8_t port_a_;
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std::weak_ptr<::Commodore::Serial::Port> serial_port_;
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std::shared_ptr<Storage::Tape::BinaryTapePlayer> tape_;
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};
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class KeyboardVIA: public MOS::MOS6522<KeyboardVIA>, public MOS::MOS6522IRQDelegate {
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public:
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KeyboardVIA();
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using MOS6522IRQDelegate::set_interrupt_status;
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void set_key_state(uint16_t key, bool isPressed);
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void clear_all_keys();
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// to satisfy MOS::MOS6522
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uint8_t get_port_input(Port port);
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void set_port_output(Port port, uint8_t value, uint8_t mask);
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void set_control_line_output(Port port, Line line, bool value);
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void set_joystick_state(JoystickInput input, bool value);
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void set_serial_port(std::shared_ptr<::Commodore::Serial::Port> serialPort);
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private:
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uint8_t port_b_;
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uint8_t columns_[8];
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uint8_t activation_mask_;
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std::weak_ptr<::Commodore::Serial::Port> serial_port_;
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};
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class SerialPort : public ::Commodore::Serial::Port {
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public:
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void set_input(::Commodore::Serial::Line line, ::Commodore::Serial::LineLevel level);
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void set_user_port_via(std::shared_ptr<UserPortVIA> userPortVIA);
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private:
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std::weak_ptr<UserPortVIA> user_port_via_;
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};
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class Vic6560: public MOS::MOS6560<Vic6560> {
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public:
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inline void perform_read(uint16_t address, uint8_t *pixel_data, uint8_t *colour_data) {
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*pixel_data = video_memory_map[address >> 10] ? video_memory_map[address >> 10][address & 0x3ff] : 0xff; // TODO
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*colour_data = colour_memory[address & 0x03ff];
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}
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uint8_t *video_memory_map[16];
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uint8_t *colour_memory;
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};
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class Machine:
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public CPU::MOS6502::Processor<Machine>,
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public CRTMachine::Machine,
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public MOS::MOS6522IRQDelegate::Delegate,
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public Utility::TypeRecipient,
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public Storage::Tape::BinaryTapePlayer::Delegate,
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public ConfigurationTarget::Machine {
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public:
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Machine();
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~Machine();
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void set_rom(ROMSlot slot, size_t length, const uint8_t *data);
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void configure_as_target(const StaticAnalyser::Target &target);
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void set_key_state(uint16_t key, bool isPressed) { keyboard_via_->set_key_state(key, isPressed); }
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void clear_all_keys() { keyboard_via_->clear_all_keys(); }
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void set_joystick_state(JoystickInput input, bool isPressed) {
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user_port_via_->set_joystick_state(input, isPressed);
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keyboard_via_->set_joystick_state(input, isPressed);
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}
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void set_memory_size(MemorySize size);
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void set_region(Region region);
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inline void set_use_fast_tape_hack(bool activate) { use_fast_tape_hack_ = activate; }
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// to satisfy CPU::MOS6502::Processor
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unsigned int perform_bus_operation(CPU::MOS6502::BusOperation operation, uint16_t address, uint8_t *value);
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void flush() { mos6560_->flush(); }
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// to satisfy CRTMachine::Machine
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virtual void setup_output(float aspect_ratio);
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virtual void close_output();
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virtual std::shared_ptr<Outputs::CRT::CRT> get_crt() { return mos6560_->get_crt(); }
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virtual std::shared_ptr<Outputs::Speaker> get_speaker() { return mos6560_->get_speaker(); }
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virtual void run_for_cycles(int number_of_cycles) { CPU::MOS6502::Processor<Machine>::run_for_cycles(number_of_cycles); }
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// to satisfy MOS::MOS6522::Delegate
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virtual void mos6522_did_change_interrupt_status(void *mos6522);
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// for Utility::TypeRecipient
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uint16_t *sequence_for_character(Utility::Typer *typer, char character);
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// for Tape::Delegate
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virtual void tape_did_change_input(Storage::Tape::BinaryTapePlayer *tape);
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private:
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uint8_t character_rom_[0x1000];
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uint8_t basic_rom_[0x2000];
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uint8_t kernel_rom_[0x2000];
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uint8_t expansion_ram_[0x8000];
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uint8_t *rom_;
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uint16_t rom_address_, rom_length_;
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uint8_t user_basic_memory_[0x0400];
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uint8_t screen_memory_[0x1000];
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uint8_t colour_memory_[0x0400];
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std::vector<uint8_t> drive_rom_;
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uint8_t *processor_read_memory_map_[64];
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uint8_t *processor_write_memory_map_[64];
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void write_to_map(uint8_t **map, uint8_t *area, uint16_t address, uint16_t length);
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Region region_;
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std::unique_ptr<Vic6560> mos6560_;
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std::shared_ptr<UserPortVIA> user_port_via_;
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std::shared_ptr<KeyboardVIA> keyboard_via_;
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std::shared_ptr<SerialPort> serial_port_;
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std::shared_ptr<::Commodore::Serial::Bus> serial_bus_;
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// Tape
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std::shared_ptr<Storage::Tape::BinaryTapePlayer> tape_;
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bool use_fast_tape_hack_;
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bool is_running_at_zero_cost_;
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// Disk
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std::shared_ptr<::Commodore::C1540::Machine> c1540_;
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void install_disk_rom();
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};
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}
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}
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#endif /* Vic20_hpp */
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