refactor: move emulation logic into sys

1 files changed, 32 insertions, 0 deletions

diff --git a/lib/nes/sys/mapper.hh b/lib/nes/sys/mapper.hh
new file mode 100644
index 0000000..e196b25
--- /dev/null
+++ b/lib/nes/sys/mapper.hh
@@ -0,0 +1,32 @@
+#pragma once
+
+#include "nes/sys/types/address.hh"
+#include "nes/sys/types/status.hh"
+
+namespace nes
+{
+	class cartridge;
+
+	class mapper
+	{
+	public:
+		static auto invalid() -> mapper&;
+		static auto get(std::uint8_t number) -> mapper&;
+
+		virtual ~mapper() = default;
+
+		mapper(mapper const&) = delete;
+		mapper(mapper&&) = delete;
+		auto operator=(mapper const&) -> mapper& = delete;
+		auto operator=(mapper&&) -> mapper& = delete;
+
+		virtual auto validate(cartridge&) -> status = 0;
+		virtual auto read_cpu(address, cartridge&) -> std::uint8_t = 0;
+		virtual auto write_cpu(address, std::uint8_t, cartridge&) -> void = 0;
+		virtual auto read_ppu(address, cartridge&, std::uint8_t const* vram) -> std::uint8_t = 0;
+		virtual auto write_ppu(address, std::uint8_t, cartridge&, std::uint8_t* vram) -> void = 0;
+
+	protected:
+		explicit mapper() = default;
+	};
+} // namespace nes
\ No newline at end of file