restructure project

1 files changed, 0 insertions, 211 deletions

diff --git a/src/nes/ppu.hh b/src/nes/ppu.hh
deleted file mode 100644
index fff51de..0000000
--- a/src/nes/ppu.hh
+++ /dev/null
@@ -1,211 +0,0 @@
-#pragma once
-
-#include "nes/util/cycle_count.hh"
-#include "status.hh"
-
-namespace nes
-{
-	class address;
-	class cpu;
-	class mapper;
-	class display;
-	class rgb;
-
-	class ppu
-	{
-		static constexpr auto vram_size = std::size_t{ 0x800 };
-		static constexpr auto oam_size = std::size_t{ 0x100 };
-		static constexpr auto palette_buffer_size = std::size_t{ 0x20 };
-		static constexpr auto status_mask = std::uint8_t{ 0b11100000 };
-		// Writes to some registers are ignored until this clock cycle.
-		static constexpr auto boot_up_cycles = cycle_count::from_ppu(29658);
-
-		enum class vram_increment : unsigned
-		{
-			add_1_across = 0,
-			add_32_down = 1,
-		};
-
-		enum class sprite_size : unsigned
-		{
-			_8x8 = 0,
-			_8x16 = 1,
-		};
-
-		enum class role : unsigned
-		{
-			background = 0,
-			sprite = 1,
-		};
-
-		enum class color : std::uint8_t
-		{
-		};
-
-		union color_index
-		{
-			struct __attribute__((packed))
-			{
-				unsigned color   : 2;
-				unsigned palette : 2;
-				role     role    : 1;
-			};
-			std::uint8_t value;
-
-			explicit color_index(std::uint8_t const value)
-				: value{ value }
-			{
-			}
-		};
-
-		struct sprite
-		{
-			std::uint32_t pattern{ 0 };
-			std::uint8_t position{ 0 };
-			bool is_in_front{ false };
-			bool is_sprite_zero{ false };
-		};
-
-		cycle_count current_cycles_;
-		cpu& cpu_;
-		mapper& mapper_;
-		display& display_;
-		std::uint8_t vram_[vram_size]{};
-		std::uint8_t oam_[oam_size]{};
-		color palette_buffer_[palette_buffer_size]
-		{
-			color{ 0x09 }, color{ 0x01 }, color{ 0x00 }, color{ 0x01 },
-			color{ 0x00 }, color{ 0x02 }, color{ 0x02 }, color{ 0x0D },
-			color{ 0x08 }, color{ 0x10 }, color{ 0x08 }, color{ 0x24 },
-			color{ 0x00 }, color{ 0x00 }, color{ 0x04 }, color{ 0x2C },
-			color{ 0x09 }, color{ 0x01 }, color{ 0x34 }, color{ 0x03 },
-			color{ 0x00 }, color{ 0x04 }, color{ 0x00 }, color{ 0x14 },
-			color{ 0x08 }, color{ 0x3A }, color{ 0x00 }, color{ 0x02 },
-			color{ 0x00 }, color{ 0x20 }, color{ 0x2C }, color{ 0x08 },
-		};
-		std::uint8_t latch_{}; // The last read/written IO register value, returned when reading write-only registers.
-		union
-		{
-			struct __attribute__((packed))
-			{
-				bool                 : 1;
-				bool                 : 1;
-				bool                 : 1;
-				bool                 : 1;
-				bool                 : 1;
-				bool sprite_overflow : 1;
-				bool sprite_zero_hit : 1;
-				bool vblank          : 1;
-			};
-			std::uint8_t value{ 0b00000000 };
-		} status_{};
-		union
-		{
-			struct __attribute__((packed))
-			{
-				std::uint8_t   base_name_table          : 2; // Base nametable address.
-				vram_increment vram_increment           : 1; // VRAM increment per CPU read/write of PPUDATA.
-				std::uint8_t   sprite_pattern_table     : 1; // Sprite pattern table address for 8x8 sprites.
-				std::uint8_t   background_pattern_table : 1; // Background pattern table address.
-				sprite_size    sprite_size              : 1; // Sprite size.
-				bool           enable_ext_pin           : 1; // PPU master/slave select.
-				bool           vblank_nmi               : 1; // Enable/disable Vblank NMI
-			};
-			std::uint8_t value{ 0b00000000 };
-		} control_{};
-		union
-		{
-			struct __attribute__((packed))
-			{
-				bool grayscale             : 1; // Enable/disable grayscale.
-				bool show_background_start : 1; // Show background in leftmost 8 pixels of screen.
-				bool show_sprites_start    : 1; // Show sprites in leftmost 8 pixels of screen.
-				bool enable_background     : 1; // Enable background rendering.
-				bool enable_sprites        : 1; // Enable sprite rendering.
-				bool emphasize_red         : 1; // Emphasize red.
-				bool emphasize_green       : 1; // Emphasize green.
-				bool emphasize_blue        : 1; // Emphasize blue.
-			};
-			std::uint8_t value{ 0b00000000 };
-		} mask_{};
-		struct
-		{
-			// See https://www.nesdev.org/wiki/PPU_scrolling#PPU_internal_registers
-			std::uint16_t v{}; // Current VRAM address (15 bits)
-			std::uint16_t t{}; // Temporary VRAM address (15 bits)
-			std::uint8_t  x{}; // Fine X scroll (3 bits)
-			bool          w{}; // Second write toggle (1 bit)
-		} internal_{};
-		std::uint8_t oamaddr_{}; // Address accessed by IO registers
-		std::uint8_t ppudata_read_buffer_{}; // Delays PPUDATA reads by one.
-		unsigned scanline_{ 240 };
-		unsigned scanline_cycle_{ 340 };
-		bool even_frame_{ true };
-		std::uint64_t tile_data_{ 0 }; // Data for the current tile (higher 32 bits) and the next tile (lower 32 bits).
-		std::uint8_t name_table_byte_{ 0 };
-		std::uint8_t attribute_table_byte_{ 0 };
-		std::uint8_t low_tile_byte_{ 0 };
-		std::uint8_t high_tile_byte_{ 0 };
-		sprite sprites_[8]{}; // Evaluated sprites.
-		unsigned sprite_count_{ 0 }; // Number of evaluated sprites in sprites_.
-		bool nmi_requested_{ false };
-
-	public:
-		explicit ppu(cpu&, mapper&, display&);
-
-		ppu(ppu const&) = delete;
-		ppu(ppu&&) = delete;
-		auto operator=(ppu const&) -> ppu& = delete;
-		auto operator=(ppu&&) -> ppu& = delete;
-
-		std::vector<test::memory_operation> memory_operations;
-
-		auto get_cycles() const -> cycle_count { return current_cycles_; }
-		auto snapshot(test::status&) -> void;
-		auto step() -> void;
-
-		// Memory access
-
-		auto read8(address) -> std::uint8_t;
-		auto write8(address, std::uint8_t) -> void;
-
-		// IO registers
-
-		auto read_latch() -> std::uint8_t;
-		auto read_ppustatus() -> std::uint8_t;
-		auto read_oamdata() -> std::uint8_t;
-		auto read_ppudata() -> std::uint8_t;
-
-		auto write_latch(std::uint8_t) -> void;
-		auto write_ppuctrl(std::uint8_t) -> void;
-		auto write_ppuscroll(std::uint8_t) -> void;
-		auto write_ppumask(std::uint8_t) -> void;
-		auto write_ppuaddr(std::uint8_t) -> void;
-		auto write_ppudata(std::uint8_t) -> void;
-		auto write_oamaddr(std::uint8_t) -> void;
-		auto write_oamdata(std::uint8_t) -> void;
-		auto write_oamdma(std::uint8_t) -> void;
-
-	private:
-		auto render_pixel() -> void;
-		auto fetch_name_table_byte() -> void;
-		auto fetch_attribute_table_byte() -> void;
-		auto fetch_low_tile_byte() -> void;
-		auto fetch_high_tile_byte() -> void;
-		auto store_tile_data() -> void;
-		auto increment_x() -> void;
-		auto increment_y() -> void;
-		auto copy_x() -> void;
-		auto copy_y() -> void;
-		auto evaluate_sprites() -> void;
-		auto fetch_sprite_pattern(unsigned i, unsigned row) -> std::uint32_t;
-
-		// Helpers
-
-		auto nmi_change() -> void;
-		auto sprite_height() -> unsigned;
-		auto increment_vram() -> void;
-		auto get_color(color_index) -> color&;
-		auto resolve_color(color) -> rgb;
-	};
-} // namespace nes
\ No newline at end of file