From b1d1573702f21e3104606d6ade5f5d39ec86a33a Mon Sep 17 00:00:00 2001 From: Hannes Schulze Date: Thu, 23 Jan 2025 22:02:11 +0100 Subject: restructure project --- lib/nes/mapper.hh | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 lib/nes/mapper.hh (limited to 'lib/nes/mapper.hh') diff --git a/lib/nes/mapper.hh b/lib/nes/mapper.hh new file mode 100644 index 0000000..f2873a6 --- /dev/null +++ b/lib/nes/mapper.hh @@ -0,0 +1,64 @@ +#pragma once + +#include "nes/util/address.hh" + +namespace nes +{ + class cartridge; + + class mapper + { + using read_cpu_func = std::uint8_t(mapper::*)(address); + using write_cpu_func = void(mapper::*)(address, std::uint8_t); + using read_ppu_func = std::uint8_t(mapper::*)(address, std::uint8_t const* vram); + using write_ppu_func = void(mapper::*)(address, std::uint8_t* vram, std::uint8_t); + + cartridge& cartridge_; + read_cpu_func read_cpu_; + write_cpu_func write_cpu_; + read_ppu_func read_ppu_; + write_ppu_func write_ppu_; + + public: + static auto select(cartridge&) -> mapper; + + mapper(mapper const&) = delete; + mapper(mapper&&) = delete; + auto operator=(mapper const&) -> mapper& = delete; + auto operator=(mapper&&) -> mapper& = delete; + + auto read_cpu(address const addr) -> std::uint8_t + { + return (this->*read_cpu_)(addr); + } + + auto write_cpu(address const addr, std::uint8_t const value) -> void + { + (this->*write_cpu_)(addr, value); + } + + auto read_ppu(address const addr, std::uint8_t const* vram) -> std::uint8_t + { + return (this->*read_ppu_)(addr, vram); + } + + auto write_ppu(address const addr, std::uint8_t* vram, std::uint8_t const value) -> void + { + (this->*write_ppu_)(addr, vram, value); + } + + private: + explicit mapper( + cartridge& cartridge, + read_cpu_func read_cpu, write_cpu_func write_cpu, + read_ppu_func read_ppu, write_ppu_func write_ppu); + + // Implementations + + auto nrom_read_cpu(address) -> std::uint8_t; + auto nrom_write_cpu(address, std::uint8_t) -> void; + auto nrom_read_ppu(address, std::uint8_t const* vram) -> std::uint8_t; + auto nrom_write_ppu(address, std::uint8_t* vram, std::uint8_t) -> void; + auto nrom_mirrored_vram_address(address) const -> unsigned; + }; +} // namespace nes \ No newline at end of file -- cgit v1.3.1