[GPLv2] (http://www.gnu.org/licenses/gpl-2.0.html)
A NES emulator using SDL2 originally written by 'ulfalizer' ported to the Steam Link. More of a Diet-Nesalizer, as alot of cool features suchh as rewind & recording were removed to allow it to run on the limited hardware of the Steamlink.
The input system has been replaced, Gamepad support has been added. Save-States are now saved to disk, with 10 slots to change between for each ROM. SRAM support has been added for ROMs that support it - Only tested with Legend of Zelda so far. NES Test ROM support has been added back, improved it a little.. now it can load a list of testroms to run through. Program arguments have been rewritten, No Arguments will launch the ROM Select Dialog. Other options are below
./nesalizer -f "/roms/romname.nes" - Will Load the ROM specified.
./nesalizer -t "/testlist.txt" - Will run through the ROMs specified in the text-file.
./nesalizer -n - Override ROM detection to always choose NTSC.
./nesalizer -p - Override ROM detection to always choose PAL.
Having finally added a method to load ROMs at runtime, I am now looking into expanding that with configurable inputs and re-add Ulf's original rewind-code now that the emulator is running at proper speed.
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ulfalizer for the original sdl version
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https://github.com/Kevoot/NESalizer - Kevroot ported my striped down nesalizer to the nintendo switch, which I think is awsome work! infact seeing as he has added a GUI to his port motivated me to come back to mine and see if I can learn something new cooking up a basic GUI for the steamlink version.
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https://github.com/usrshare/nesalizerX - Another interesting port of the original nesalizer, this guy seems to know what he is doing.
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Shay Green (blargg) for the blip_buf waveform synthesis library.
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Quietust for the Visual 2A03 and Visual 2C02 simulators.
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beannaich, cpow, Disch, kevtris, Movax21, Lidnariq, loopy, thefox, Tepples and lots of other people on the NesDev forums and wiki and in #nesdev for help, docs, tests, and discussion.
Requires the Steamlink-SDK available on github
git clone https://github.com/ValveSoftware/steamlink-sdk
cd steamlink-sdk/examples
git clone --recurse-submodules git@github.com:thecosmicslug/NESalizer-steamlink.git
cd NESalizer-steamlink
./build_nesalizer_steamlink.sh
ImGUI Support has been added, allowing for a File Open Dialog for selecting ROMs. Simply press the leftthumbstick in and the Dialog will show. A ROM filename can still be provided as program argument to load on startup.
Movement:
- SDL_CONTROLLER_BUTTON_DPAD_UP
- SDL_CONTROLLER_BUTTON_DPAD_DOWN
- SDL_CONTROLLER_BUTTON_DPAD_LEFT
- SDL_CONTROLLER_BUTTON_DPAD_RIGHT
Buttons:
- SDL_CONTROLLER_BUTTON_BACK = Select
- SDL_CONTROLLER_BUTTON_START = Start
- SDL_CONTROLLER_BUTTON_A = A
- SDL_CONTROLLER_BUTTON_B = B
Emulation:
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SDL_CONTROLLER_BUTTON_LEFTSHOULDER = Load State
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SDL_CONTROLLER_BUTTON_RIGHTSHOULDER = Save State
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SDL_CONTROLLER_BUTTON_X = Slot -
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SDL_CONTROLLER_BUTTON_Y = Slot +
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SDL_CONTROLLER_BUTTON_LEFTSTICK = Load ROM
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SDL_CONTROLLER_BUTTON_RIGHTSTICK = Quit NESalizer
iNES mappers (support circuitry inside cartridges) supported so far: 0, 1, 2, 3, 4, 5 (including ExGrafix, split screen, and PRG RAM swapping), 7, 9, 10, 11, 13, 28, 71, 232. This covers the majority of ROMs.
Supports tricky-to-emulate games like Mig-29 Soviet Fighter, Bee 52, Uchuu Keibitai SDF, Just Breed, and Battletoads.
Uses a low-level renderer that simulates the rendering pipeline in the real PPU (NES graphics processor), following the model in this timing diagram that ulfalizer put together with help from the NesDev community.
(It won't make much sense without some prior knowledge of how graphics work on the NES.
Most prediction and catch-up (two popular emulator optimization techniques) is omitted in favor of straightforward and robust code. This makes many effects that require special handling in some other emulators work automatically