Ported by raz0red
JS7800 is an enhanced JavaScript port of the ProSystem Atari 7800 emulator that was originally developed by Greg Stanton.
https://raz0red.github.io/js7800/
In order to operate correctly and smoothly (no lags, etc.), JS7800 requires an updated version of a modern browser (Chrome, Firefox, Safari) on a capably configured system.
- Global high score tracking (for HSC compatible games)
- Customizable keyboard mappings
- Gamepad compatibility (with dual-analog support for Robotron-style games)
- Full screen support
- Multiple aspect ratios
- Ability to enable/disable video filters
- Drag and drop support for local files and remote file links
- Cartridge list support (see JS7800 Wiki)
- Light gun support (via mouse)
- Expansion Module (XM) support
- Enhanced bank switching and cartridge detection
- Mobile support (virtual buttons, proper screen sizing, etc.)
- (partially available in webЯcade)
- Paddle controller support (via mouse)
- Updating the emulation core to integrate accuracy and compatibility improvements that are part of the incredible A7800 emulator
- Save/load state support (available in webЯcade)
- Network-based multiplayer support
- Improved cartridge browser with detailed descriptions and screenshots (available in webЯcade)
JS7800 includes integrated documentation via the "Help/Information" button located in the commands bar directly below the emulator screen.
For information on the "cartridge list" format, request parameters, and more, refer to the JS7800 Wiki.
- Souper support
- Activision OM ROM layout support
- Pole Position II track selection fix (by RevEng @ AtariAge)
- Tower Toppler and Jinks composite smoothing (by RevEng @ AtariAge)
- Updated palettes (contributed by Trebor @ AtariAge)
- Updated Popeye (JS7800 Demo 2.41) (contributed by darryl1970 @ AtariAge)
- TIA fidelity issue fix (contributed by RevEng @ AtariAge)
- Pokey rewrite (contributed by RevEng @ AtariAge)
- RIOT interrupt mirror fix (contributed by RevEng @ AtariAge)
- Added Drelbs homebrew
- Added latest version of Arkanoid homebrew (now works due to RIOT fix)
- Added several Pokey-based demos
- Updated palettes (contributed by Trebor @ AtariAge)
- YM-2151 default volume level adjustment
- Cartridge header fix for television type
- Banksets support
- Maria background color fix (Keystone Koppers)
- Cartridge headers fix (Fixes several ROMs that required special versions)
- Improved cycle accuracy (resolves several game glitches)
- YM-2151 homebrew auto-detect support
- Pokey filter support (contributed by RevEng @ AtariAge)
- Support for 7800 Diagnostic cartridge
- Save state support (only accessible via webЯcade)
- Added to default game list: IE78 (Demo), Bad Apple (Demo), Bankset Tests,
Baby Pac-Man, 7800 Test, Keystone Koppers (Demo), Galaxian, PentaGo!
- Updated several games to latest versions
- Added high score support for: 1942, Galaxian, Keystone Koppers, PentaGo!,
latest versions of games that were already supported.
- Added global high score support for "Popeye"
- Added global high score support for the latest version of "Pac-Man Collection!"
- Updated to the latest versions of "Dragon's Cache", "Dragon's Descent", "Popeye",
"Spire of the Ancients", "E.X.O", and "Knight Guy: Castle Days"
- Added support for undocumented ASR and ANC opcodes (fixes graphical glitches with
"Popeye 7800: Mini-game")
- Added global high score support for the latest version of "Pac-Man XM"
- Added "Popeye 7800: Mini-game" and "Knight Guy: Castle Days" to the default list of
in-development games
- Updated to the latest versions of "Dragon's Cache", "Dragon's Descent", "GoSub", and
"Spire of the Ancients"
- Updating to the latest version of "Dragon's Descent" required the global high scores for
this game to be reset (the latest version modified the way high scores were stored)
- XM implementation has been updated to be consistent with the released hardware
- Initial support for the Yamaha (YM2151) sound chip
- Ability to disable vertical sync ("Advanced" tab of settings dialog)
- Zanac and Side-Crawler's Dance Yamaha music demos added to default cartridge list
- XM memory test added to default cartridge list
- By default, high scores for games that are not supported by the Global High Score server
will be stored locally
- Resolved defect where Global High Scores were not supported when local storage was disabled
- Ability to select a color palette ("Cool", "Warm", and "Hot") in "Dark" and "Light" variations
- "Fullscreen" scaling option (Integer vs. Fill)
- "Global Leaderboard" page
- Contextual launch of "Global Leaderboard" via controls bar
- Initial release