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retroKOffline
Post subject: jgnes 0.4.0  PostPosted: May 25, 2023 - 02:46 PM
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Joined: Jul 04, 2004
Posts: 11312

Location: Frankfurt a.M.
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Eine neue Version des NES Emulators jgnes wurde für Linux und Windows veröffentlicht. 


The NES emulator jgnes for Linux and Windows has been updated. 

Quote:
  • Additional mappers implemented:
    • BNROM (iNES mapper 34)
    • NINA-001 (also iNES mapper 34)
    • GxROM (iNES mapper 66)
    • Jaleco JF-11 / JF-14 (iNES mapper 140)
    • Bandai FCG-1 / FCG-2 (iNES mapper 16, submapper 4)
    • Bandai LZ93D50 w/ X24C01 EEPROM chip (iNES mapper 159)
    • Bandai LZ93D50 w/ X24C02 EEPROM chip or no writable memory (iNES mapper 16, submapper 5)
    • Bandai LZ93D50 w/ 8KB SRAM (iNES mapper 153)
  • Additional mapper features implemented:
    • Konami VRC6 expansion audio is now slightly amplified linearly; before this change, audio output from this mapper was very quiet compared to the builtin APU audio and other boards with expansion audio
  • Web frontend made much more featureful:
    • Allow loading different ROM files without needing to refresh the page
    • Add a reset button
    • Add aspect ratio (NTSC / Square pixels) and image filtering options (Nearest neighbor / Linear 1x/2x/3x); the linear 2x/3x options are implemented using CPU scaling because WebGL does not support GPU compute shaders
    • Implement audio using the AudioWorklet API
    • Implement audio sync to prevent the emulator from running too fast on high refresh rate displays
    • Implement persistent save files using local storage, and add a button to download the save file for the currently running game
    • Fix window scaling so that the window size accounts for DPI scale factor
    • Disallow opposing directional inputs to be pressed simultaneously (left+right or up+down); allowing these can cause severe glitches in some games (e.g. Zelda 2 and Battletoads). If opposing inputs are pressed simultaneously, left/up will be sent to the emulated NES rather than right or down
    • Add a .nes file filter to the file picker dialog (previously there was no filter at all)
    • When the page is loaded, hide the UI and display "Loading..." until the WASM is loaded and all event listeners are added
  • Add an option to all frontends to allow silencing the triangle wave audio channel when it is outputting waves at ultrasonic frequencies, which can reduce audio popping in some games (e.g. Mega Man 2)
  • Enable link-time optimizations for published release builds to significantly reduce executable binary sizes
  • Implement a hack to fix the GUI scaling factor from defaulting to 4.5 on the Steam Deck, which made the GUI completely unusable
  • A few minor performance improvements:
    • Refactor audio downsampling code to avoid needing to do floating point multiplications and divisions on every emulated CPU cycle
    • In the PPU code, add a bit set storing which pixels contain any sprites to avoid needing to loop over all sprites on the scanline on pixels that don't contain any sprites
    • Change the square wave channel sweep units to only recompute the target period when one of their inputs changes, either the sweep config or the phase timer period


Related links:
[ NES Emulatoren ][ NES Infos ]

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