refactor: move emulation logic into sys

1 files changed, 0 insertions, 134 deletions

diff --git a/lib/nes/ref/mapper.cc b/lib/nes/ref/mapper.cc
deleted file mode 100644
index 7e4cffe..0000000
--- a/lib/nes/ref/mapper.cc
+++ /dev/null
@@ -1,134 +0,0 @@
-#include "nes/ref/mapper.hh"
-#include "nes/ref/cartridge.hh"
-#include <iostream>
-
-namespace nes::ref
-{
-	mapper::mapper(
-		cartridge& cartridge,
-		read_cpu_func const read_cpu, write_cpu_func const write_cpu,
-		read_ppu_func const read_ppu, write_ppu_func const write_ppu)
-		: cartridge_{ cartridge }
-		, read_cpu_{ read_cpu }
-		, write_cpu_{ write_cpu }
-		, read_ppu_{ read_ppu }
-		, write_ppu_{ write_ppu }
-	{
-	}
-
-	auto mapper::select(cartridge& cartridge) -> mapper
-	{
-		switch (cartridge.get_mapper_number())
-		{
-			case 0x00:
-				return mapper{
-					cartridge,
-					&mapper::nrom_read_cpu, &mapper::nrom_write_cpu,
-					&mapper::nrom_read_ppu, &mapper::nrom_write_ppu };
-			default:
-				std::cerr << "Mapper not implemented: " << std::hex << cartridge.get_mapper_number() << std::endl;
-				std::abort();
-		}
-	}
-
-	// -----------------------------------------------------------------------------------------------------------------
-	// NROM
-	// -----------------------------------------------------------------------------------------------------------------
-
-	auto mapper::nrom_read_cpu(address const addr) -> std::uint8_t
-	{
-		if (addr <= address{ 0x5FFF })
-		{
-			return 0x0;
-		}
-		if (addr <= address{ 0x7FFF })
-		{
-			return cartridge_.get_ram()[addr.get_absolute() - 0x6000];
-		}
-		if (addr <= address{ 0xBFFF })
-		{
-			auto const rel = addr.get_absolute() - 0x8000;
-			if (rel >= cartridge_.get_prg_rom_length()) { return 0x0; }
-
-			return cartridge_.get_prg_rom()[rel];
-		}
-		if (addr <= address{ 0xFFFF })
-		{
-			auto rel = addr.get_absolute() - 0xC000;
-			if (cartridge_.get_prg_rom_length() > 0x4000) { rel += 0x4000; }
-			if (rel >= cartridge_.get_prg_rom_length()) { return 0x0; }
-
-			return cartridge_.get_prg_rom()[rel];
-		}
-
-		return 0x0;
-	}
-
-	auto mapper::nrom_write_cpu(address const addr, std::uint8_t const value) -> void
-	{
-		if (addr <= address{ 0x5FFF })
-		{
-			return;
-		}
-		if (addr <= address{ 0x7FFF })
-		{
-			cartridge_.get_ram_mut()[addr.get_absolute() - 0x6000] = value;
-			return;
-		}
-	}
-
-	auto mapper::nrom_read_ppu(address const addr, std::uint8_t const* vram) -> std::uint8_t
-	{
-		if (addr <= address{ 0x1FFF })
-		{
-			auto const rel = addr.get_absolute();
-			if (rel >= cartridge_.get_chr_rom_length()) { return 0x0; }
-
-			return cartridge_.get_chr_rom()[rel];
-		}
-		if (addr <= address{ 0x3EFF })
-		{
-			return vram[nrom_mirrored_vram_address(addr)];
-		}
-
-		return 0x0;
-	}
-
-	auto mapper::nrom_write_ppu(address const addr, std::uint8_t* vram, std::uint8_t const value) -> void
-	{
-		if (addr <= address{ 0x1FFF })
-		{
-			return;
-		}
-		if (addr <= address{ 0x3EFF })
-		{
-			vram[nrom_mirrored_vram_address(addr)] = value;
-			return;
-		}
-	}
-
-	auto mapper::nrom_mirrored_vram_address(address const addr) const -> unsigned
-	{
-		auto const rel = addr.get_absolute() % 0x1000;
-
-		switch (cartridge_.get_name_table_arrangement())
-		{
-			case name_table_arrangement::horizontal:
-				// $2000 = $2400, $2800 = $2c00
-				if (rel <= 0x3FF) { return 0x000 + (rel % 0x400); }
-				if (rel <= 0x7FF) { return 0x000 + (rel % 0x400); }
-				if (rel <= 0xBFF) { return 0x400 + (rel % 0x400); }
-				if (rel <= 0xFFF) { return 0x400 + (rel % 0x400); }
-				break;
-			case name_table_arrangement::vertical:
-				// $2000 = $2800, $2400 = $2c00
-				if (rel <= 0x3FF) { return 0x000 + (rel % 0x400); }
-				if (rel <= 0x7FF) { return 0x400 + (rel % 0x400); }
-				if (rel <= 0xBFF) { return 0x000 + (rel % 0x400); }
-				if (rel <= 0xFFF) { return 0x400 + (rel % 0x400); }
-				break;
-		}
-
-		return 0;
-	}
-} // namespace nes::ref
\ No newline at end of file