2021-07-23 01:16:23 +00:00
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//
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// Chipset.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 22/07/2021.
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// Copyright © 2021 Thomas Harte. All rights reserved.
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//
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#ifndef Chipset_hpp
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#define Chipset_hpp
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2021-10-22 03:48:57 +00:00
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#include <algorithm>
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2021-10-09 01:11:47 +00:00
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#include <array>
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2021-10-22 03:48:57 +00:00
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#include <cassert>
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2021-07-23 01:16:23 +00:00
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#include <cstddef>
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#include <cstdint>
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2021-10-04 13:44:54 +00:00
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#include "../../Activity/Source.hpp"
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2021-10-05 22:38:56 +00:00
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#include "../../ClockReceiver/ClockingHintSource.hpp"
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2021-11-11 14:24:15 +00:00
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#include "../../ClockReceiver/JustInTime.hpp"
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2021-10-04 13:44:54 +00:00
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#include "../../Components/6526/6526.hpp"
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2021-07-26 22:44:20 +00:00
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#include "../../Outputs/CRT/CRT.hpp"
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2021-10-04 13:44:54 +00:00
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#include "../../Processors/68000/68000.hpp"
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2021-10-04 23:45:05 +00:00
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#include "../../Storage/Disk/Controller/DiskController.hpp"
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2021-10-04 15:12:13 +00:00
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#include "../../Storage/Disk/Drive.hpp"
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2021-07-23 01:16:23 +00:00
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2021-11-09 12:11:23 +00:00
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#include "Audio.hpp"
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2021-11-26 23:16:24 +00:00
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#include "Bitplanes.hpp"
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2021-07-23 01:16:23 +00:00
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#include "Blitter.hpp"
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2021-09-17 01:17:23 +00:00
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#include "Copper.hpp"
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#include "DMADevice.hpp"
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2021-10-13 22:09:19 +00:00
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#include "Flags.hpp"
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2021-11-06 19:03:09 +00:00
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#include "Keyboard.hpp"
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2021-11-26 22:50:47 +00:00
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#include "MouseJoystick.hpp"
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2021-10-04 13:44:54 +00:00
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#include "MemoryMap.hpp"
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2021-11-26 20:30:31 +00:00
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#include "Sprites.hpp"
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2021-07-23 01:16:23 +00:00
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namespace Amiga {
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2021-10-05 22:38:56 +00:00
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class Chipset: private ClockingHint::Observer {
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2021-07-23 01:16:23 +00:00
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public:
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2021-10-04 15:12:13 +00:00
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Chipset(MemoryMap &memory_map, int input_clock_rate);
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2021-07-23 01:16:23 +00:00
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2021-07-24 01:24:07 +00:00
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struct Changes {
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2021-07-26 20:40:42 +00:00
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int interrupt_level = 0;
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2021-07-27 00:13:06 +00:00
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HalfCycles duration;
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2021-08-09 01:52:28 +00:00
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Changes &operator += (const Changes &rhs) {
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duration += rhs.duration;
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return *this;
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}
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2021-07-24 01:24:07 +00:00
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};
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2021-07-27 20:41:18 +00:00
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/// Advances the stated amount of time.
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Changes run_for(HalfCycles);
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2021-12-10 00:17:44 +00:00
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/// Advances to the end of the next available CPU slot.
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Changes run_until_after_cpu_slot();
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2021-07-23 01:16:23 +00:00
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/// Performs the provided microcycle, which the caller guarantees to be a memory access.
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void perform(const CPU::MC68000::Microcycle &);
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2021-07-28 23:36:30 +00:00
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/// Sets the current state of the CIA interrupt lines.
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void set_cia_interrupts(bool cia_a, bool cia_b);
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2021-07-26 20:40:42 +00:00
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/// Provides the chipset's current interrupt level.
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int get_interrupt_level() {
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return interrupt_level_;
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}
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2021-10-05 23:12:30 +00:00
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/// Inserts the disks provided.
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/// @returns @c true if anything was inserted; @c false otherwise.
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bool insert(const std::vector<std::shared_ptr<Storage::Disk::Disk>> &disks);
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2021-07-26 22:44:20 +00:00
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// The standard CRT set.
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void set_scan_target(Outputs::Display::ScanTarget *scan_target);
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Outputs::Display::ScanStatus get_scaled_scan_status() const;
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void set_display_type(Outputs::Display::DisplayType);
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Outputs::Display::DisplayType get_display_type() const;
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2021-10-04 13:44:54 +00:00
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// Activity observation.
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void set_activity_observer(Activity::Observer *observer) {
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cia_a_handler_.set_activity_observer(observer);
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2021-10-06 11:54:40 +00:00
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disk_controller_.set_activity_observer(observer);
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2021-10-04 13:44:54 +00:00
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}
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2021-11-17 20:33:46 +00:00
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// Keyboard and mouse exposure.
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2021-11-06 19:03:09 +00:00
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Keyboard &get_keyboard() {
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return keyboard_;
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}
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2021-11-17 20:33:46 +00:00
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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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// Synchronisation.
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2021-11-12 20:30:52 +00:00
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void flush();
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2021-11-26 23:16:24 +00:00
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// Input for receiving collected bitplanes.
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void post_bitplanes(const BitplaneData &data);
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2021-12-01 10:37:58 +00:00
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// Obtains the source of audio output.
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Outputs::Speaker::Speaker *get_speaker() {
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return audio_.get_speaker();
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}
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2021-07-23 01:16:23 +00:00
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private:
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2021-09-15 00:51:32 +00:00
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friend class DMADeviceBase;
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2021-08-09 21:35:09 +00:00
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2021-12-18 22:43:53 +00:00
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// MARK: - Register read/write functions.
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2021-12-19 21:31:44 +00:00
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uint16_t read(uint32_t address, bool allow_conversion = true);
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void write(uint32_t address, uint16_t value, bool allow_conversion = true);
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2021-12-18 22:53:11 +00:00
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static constexpr uint32_t ChipsetAddressMask = 0x1fe;
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friend class Copper;
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2021-12-18 22:43:53 +00:00
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2021-11-07 13:19:16 +00:00
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// MARK: - E Clock and keyboard dividers.
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2021-10-04 13:44:54 +00:00
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HalfCycles cia_divider_;
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2021-11-07 13:19:16 +00:00
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HalfCycles keyboard_divider_;
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2021-10-04 13:44:54 +00:00
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2021-07-23 01:16:23 +00:00
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// MARK: - Interrupts.
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uint16_t interrupt_enable_ = 0;
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uint16_t interrupt_requests_ = 0;
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2021-07-26 20:40:42 +00:00
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int interrupt_level_ = 0;
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2021-07-23 01:16:23 +00:00
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2021-07-26 20:40:42 +00:00
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void update_interrupts();
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2021-08-10 00:31:14 +00:00
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void posit_interrupt(InterruptFlag);
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2021-07-23 01:16:23 +00:00
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2021-07-27 20:41:18 +00:00
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// MARK: - Scheduler.
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2021-08-09 01:52:28 +00:00
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template <bool stop_on_cpu> Changes run(HalfCycles duration = HalfCycles::max());
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2021-07-28 01:59:27 +00:00
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template <bool stop_on_cpu> int advance_slots(int, int);
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2021-07-27 20:41:18 +00:00
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template <int cycle, bool stop_if_cpu> bool perform_cycle();
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2021-07-28 01:33:07 +00:00
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template <int cycle> void output();
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2021-11-28 10:06:30 +00:00
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void output_pixels(int cycles_until_sync);
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void apply_ham(uint8_t);
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2021-07-27 20:41:18 +00:00
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// MARK: - DMA Control, Scheduler and Blitter.
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2021-07-23 01:16:23 +00:00
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uint16_t dma_control_ = 0;
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Blitter blitter_;
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2021-11-27 20:03:46 +00:00
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// MARK: - Sprites and collision flags.
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2021-07-23 01:16:23 +00:00
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2021-11-26 21:02:18 +00:00
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std::array<Sprite, 8> sprites_;
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std::array<TwoSpriteShifter, 4> sprite_shifters_;
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2021-11-27 20:03:46 +00:00
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uint16_t collisions_ = 0, collisions_flags_= 0;
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uint32_t playfield_collision_mask_ = 0, playfield_collision_complement_ = 0;
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2021-10-25 23:30:30 +00:00
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2021-08-10 23:01:41 +00:00
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// MARK: - Raster position and state.
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2021-07-23 01:45:51 +00:00
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2021-08-10 23:01:41 +00:00
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// Definitions related to PAL/NTSC.
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2021-11-02 21:34:03 +00:00
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// (Default values are PAL).
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2021-07-28 01:33:07 +00:00
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int line_length_ = 227;
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2021-11-02 21:34:03 +00:00
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int short_field_height_ = 312;
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2021-11-26 14:37:52 +00:00
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int vertical_blank_height_ = 25; // PAL = 25, NTSC = 20
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2021-07-23 02:00:53 +00:00
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2021-08-10 23:01:41 +00:00
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// Current raster position.
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int line_cycle_ = 0, y_ = 0;
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// Parameters affecting bitplane collection and output.
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2021-07-23 02:00:53 +00:00
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uint16_t display_window_start_[2] = {0, 0};
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uint16_t display_window_stop_[2] = {0, 0};
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uint16_t fetch_window_[2] = {0, 0};
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2021-07-26 22:44:20 +00:00
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2021-08-10 23:01:41 +00:00
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// Ephemeral bitplane collection state.
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2022-03-17 23:39:24 +00:00
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bool fetch_vertical_ = false;
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2021-08-12 00:31:37 +00:00
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bool display_horizontal_ = false;
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2021-08-11 01:28:48 +00:00
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bool did_fetch_ = false;
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2022-03-17 23:39:24 +00:00
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int horizontal_offset_ = 0;
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enum HorizontalFetch {
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Disabled, Enabled, StopRequested
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} horizontal_fetch_ = HorizontalFetch::Disabled;
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2021-08-10 23:01:41 +00:00
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2021-08-12 00:31:37 +00:00
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// Output state.
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uint16_t border_colour_ = 0;
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bool is_border_ = true;
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int zone_duration_ = 0;
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uint16_t *pixels_ = nullptr;
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2021-11-28 10:06:30 +00:00
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uint16_t last_colour_ = 0; // Retained for HAM mode.
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2021-08-12 00:31:37 +00:00
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void flush_output();
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2021-11-26 23:16:24 +00:00
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Bitplanes bitplanes_;
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2021-08-11 01:28:48 +00:00
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2021-11-01 21:18:58 +00:00
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BitplaneData next_bitplanes_, previous_bitplanes_;
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bool has_next_bitplanes_ = false;
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2021-10-22 03:48:57 +00:00
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2021-11-02 00:15:36 +00:00
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int odd_priority_ = 0, even_priority_ = 0;
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bool even_over_odd_ = false;
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bool hold_and_modify_ = false;
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bool dual_playfields_ = false;
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bool interlace_ = false;
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2021-11-02 10:47:39 +00:00
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bool is_long_field_ = false;
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2021-11-02 00:15:36 +00:00
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2021-11-26 23:16:24 +00:00
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BitplaneShifter bitplane_pixels_;
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2021-08-10 23:01:41 +00:00
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2021-08-11 22:47:35 +00:00
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int odd_delay_ = 0, even_delay_ = 0;
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2021-09-20 23:00:52 +00:00
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bool is_high_res_ = false;
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2021-08-11 22:47:35 +00:00
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2021-07-26 22:44:20 +00:00
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// MARK: - Copper.
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2021-09-17 01:17:23 +00:00
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Copper copper_;
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2021-07-30 22:24:27 +00:00
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2021-11-09 12:11:23 +00:00
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// MARK: - Audio.
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2021-11-13 20:53:41 +00:00
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Audio audio_;
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2021-11-09 12:11:23 +00:00
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2021-07-30 22:24:27 +00:00
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// MARK: - Serial port.
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class SerialPort {
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public:
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2021-12-23 20:22:20 +00:00
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void set_control(uint16_t);
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void set_data(uint16_t);
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uint16_t get_status();
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2021-07-30 22:24:27 +00:00
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private:
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uint16_t value = 0, reload = 0;
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uint16_t shift = 0, receive_shift = 0;
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uint16_t status;
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} serial_;
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2021-07-26 22:44:20 +00:00
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2021-10-09 11:08:59 +00:00
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// MARK: - Pixel output.
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Outputs::CRT::CRT crt_;
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uint16_t palette_[32]{};
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2021-11-01 21:44:30 +00:00
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uint16_t swizzled_palette_[64]{};
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2021-10-09 11:08:59 +00:00
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2021-10-24 03:17:13 +00:00
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// MARK: - Mouse.
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private:
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2021-11-26 22:50:47 +00:00
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Mouse mouse_;
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2021-10-24 03:17:13 +00:00
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public:
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2021-11-26 22:50:47 +00:00
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Inputs::Mouse &get_mouse() {
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return mouse_;
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}
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2021-10-24 03:17:13 +00:00
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2021-11-17 19:26:51 +00:00
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// MARK: - Joystick.
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private:
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2021-11-17 20:33:46 +00:00
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std::vector<std::unique_ptr<Inputs::Joystick>> joysticks_;
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Joystick &joystick(size_t index) const {
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return *static_cast<Joystick *>(joysticks_[index].get());
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}
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2021-10-24 03:17:13 +00:00
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// MARK: - CIAs.
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2021-10-09 11:08:59 +00:00
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private:
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class DiskController;
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class CIAAHandler: public MOS::MOS6526::PortHandler {
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public:
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2021-10-24 03:17:13 +00:00
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CIAAHandler(MemoryMap &map, DiskController &controller, Mouse &mouse);
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2021-10-09 11:08:59 +00:00
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void set_port_output(MOS::MOS6526::Port port, uint8_t value);
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uint8_t get_port_input(MOS::MOS6526::Port port);
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void set_activity_observer(Activity::Observer *observer);
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2021-11-17 20:33:46 +00:00
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// TEMPORARY.
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// TODO: generalise mice and joysticks.
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// This is a hack. A TEMPORARY HACK.
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void set_joystick(Joystick *joystick) {
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joystick_ = joystick;
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}
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2021-10-09 11:08:59 +00:00
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private:
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MemoryMap &map_;
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DiskController &controller_;
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2021-10-24 03:17:13 +00:00
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Mouse &mouse_;
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2021-11-17 20:33:46 +00:00
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Joystick *joystick_ = nullptr;
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2021-10-09 11:08:59 +00:00
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Activity::Observer *observer_ = nullptr;
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inline static const std::string led_name = "Power";
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} cia_a_handler_;
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class CIABHandler: public MOS::MOS6526::PortHandler {
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public:
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CIABHandler(DiskController &controller);
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void set_port_output(MOS::MOS6526::Port port, uint8_t value);
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uint8_t get_port_input(MOS::MOS6526::Port);
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private:
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DiskController &controller_;
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} cia_b_handler_;
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public:
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using CIAA = MOS::MOS6526::MOS6526<CIAAHandler, MOS::MOS6526::Personality::P8250>;
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using CIAB = MOS::MOS6526::MOS6526<CIABHandler, MOS::MOS6526::Personality::P8250>;
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// CIAs are provided for direct access; it's up to the caller properly
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// to distinguish relevant accesses.
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CIAA cia_a;
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CIAB cia_b;
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private:
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2021-08-09 21:35:09 +00:00
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// MARK: - Disk drives.
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2021-10-09 00:18:11 +00:00
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class DiskDMA: public DMADevice<1> {
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public:
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using DMADevice::DMADevice;
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2021-11-03 01:18:59 +00:00
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void set_length(uint16_t);
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void set_control(uint16_t);
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2021-11-13 20:53:41 +00:00
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bool advance_dma();
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2021-10-09 00:18:11 +00:00
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void enqueue(uint16_t value, bool matches_sync);
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private:
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uint16_t length_;
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bool dma_enable_ = false;
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bool write_ = false;
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2021-10-11 13:16:01 +00:00
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uint16_t last_set_length_ = 0;
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2021-11-03 01:18:59 +00:00
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bool sync_with_word_ = false;
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2021-10-09 01:11:47 +00:00
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std::array<uint16_t, 4> buffer_;
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size_t buffer_read_ = 0, buffer_write_ = 0;
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2021-11-03 01:18:59 +00:00
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enum class State {
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Inactive,
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WaitingForSync,
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Reading,
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} state_ = State::Inactive;
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2021-10-09 00:18:11 +00:00
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} disk_;
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2021-10-05 22:38:56 +00:00
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class DiskController: public Storage::Disk::Controller {
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2021-10-04 23:45:05 +00:00
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public:
|
2021-10-14 23:36:17 +00:00
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DiskController(Cycles clock_rate, Chipset &chipset, DiskDMA &disk_dma, CIAB &cia);
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2021-10-04 23:45:05 +00:00
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2021-10-05 12:12:01 +00:00
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void set_mtr_sel_side_dir_step(uint8_t);
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uint8_t get_rdy_trk0_wpro_chng();
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2021-10-04 23:45:05 +00:00
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2021-10-05 22:38:56 +00:00
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void run_for(Cycles duration) {
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Storage::Disk::Controller::run_for(duration);
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}
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2021-10-05 23:12:30 +00:00
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bool insert(const std::shared_ptr<Storage::Disk::Disk> &disk, size_t drive);
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2021-10-06 11:54:40 +00:00
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void set_activity_observer(Activity::Observer *);
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2021-10-05 23:12:30 +00:00
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2021-10-07 12:11:32 +00:00
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void set_sync_word(uint16_t);
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void set_control(uint16_t);
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|
2021-10-04 23:45:05 +00:00
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private:
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void process_input_bit(int value) final;
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void process_index_hole() final;
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|
2021-10-05 12:12:01 +00:00
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// Implement the Amiga's drive ID shift registers
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|
|
// directly in the controller for now.
|
|
|
|
uint32_t drive_ids_[4]{};
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|
|
uint32_t previous_select_ = 0;
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|
2021-10-07 12:11:32 +00:00
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|
uint16_t data_ = 0;
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|
int bit_count_ = 0;
|
2021-10-14 23:36:17 +00:00
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|
|
uint16_t sync_word_ = 0x4489; // TODO: confirm or deny guess.
|
2021-10-07 12:11:32 +00:00
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|
|
bool sync_with_word_ = false;
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|
|
|
|
2021-10-14 23:36:17 +00:00
|
|
|
Chipset &chipset_;
|
2021-10-09 00:18:11 +00:00
|
|
|
DiskDMA &disk_dma_;
|
2021-10-09 11:08:59 +00:00
|
|
|
CIAB &cia_;
|
2021-10-09 00:18:11 +00:00
|
|
|
|
2021-10-04 23:45:05 +00:00
|
|
|
} disk_controller_;
|
2021-10-14 23:36:17 +00:00
|
|
|
friend DiskController;
|
2021-10-07 12:11:32 +00:00
|
|
|
|
2021-10-05 22:38:56 +00:00
|
|
|
void set_component_prefers_clocking(ClockingHint::Source *, ClockingHint::Preference) final;
|
|
|
|
bool disk_controller_is_sleeping_ = false;
|
2021-10-07 12:11:32 +00:00
|
|
|
uint16_t paula_disk_control_ = 0;
|
2021-11-06 19:03:09 +00:00
|
|
|
|
|
|
|
// MARK: - Keyboard.
|
|
|
|
|
|
|
|
Keyboard keyboard_;
|
2021-07-23 01:16:23 +00:00
|
|
|
};
|
|
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|
|
}
|
|
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|
|
#endif /* Chipset_hpp */
|