systems:gong [Batocera.linux

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====== Pong (Gong) ======
Gong is a standalone [[wp>Pong|Pong]] clone written as a libretro core by Brad Parker. It recreates the classic 1972 arcade game — two paddles, one ball, and simple score tracking. The angle of the ball's return depends on where it strikes the paddle.

This is **not** an emulator of any real hardware. It is a self-contained game that runs inside RetroArch without needing any ROM files. A dummy ''.game'' file is used as an entry point in EmulationStation.

[[wp>Pong|Pong]] was one of the earliest arcade video games and the first commercially successful one. Created by [[wp>Allan_Alcorn|Allan Alcorn]] at [[wp>Atari,_Inc.|Atari]] in 1972, the first cabinet was installed at Andy Capp's Tavern in Sunnyvale, California, and reportedly broke down within days because the coin mechanism was overflowing with quarters.

This system scrapes metadata for the "gong" group(s) and loads the ''gong'' set from the currently selected theme, if available.
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==== Quick reference ====
  * **Emulator:** [[#retroarch|RetroArch]]
  * **Core:** [[#libretro:_gong|libretro: gong]]
  * **Folder:** ''/userdata/roms/gong''
  * **Accepted ROM formats:** ''.game''

===== BIOS =====
No BIOS files are required. Gong is a standalone libretro game.

===== ROMs =====
Place a dummy ''.game'' file in ''/userdata/roms/gong'' (e.g. ''gong.game''). This file is only needed as a launch entry point for EmulationStation — no actual ROM data is required.

===== Emulators =====
==== RetroArch ====
[[https://docs.libretro.com/|RetroArch]] (formerly SSNES), is a ubiquitous frontend that can run multiple "cores", which are essentially the emulators themselves. The most common cores use the [[https://www.libretro.com/|libretro]] API, so that's why cores run in RetroArch in Batocera are referred to as "libretro: (core name)". RetroArch aims to unify the feature set of all libretro cores and offer a universal, familiar interface independent of platform.

=== RetroArch configuration ===
RetroArch offers a **Quick Menu** accessed by pressing ''[HOTKEY]'' + {{:wiki:south.png?nolink&20|South button (B SNES)}} which can be used to alter various things like [[:advanced_retroarch_settings|RetroArch and core options]], and [[:remapping_controls_per_emulator|controller mapping]]. Most RetroArch related settings can be altered from Batocera's EmulationStation.

=== libretro: gong ===
The [[https://github.com/libretro/gong|gong]] core is a standalone Pong game clone written directly as a libretro core. It has no configuration options.
  * **License:** GPL v3
  * **Savestates:** supported
  * **No core options, no cheats, no disk control**

===== Controls =====
Gong uses simple two-player paddle controls:

^ Player ^ Action ^ Control ^
| Player 1 | Move paddle up/down | D-pad Up/Down or Left Analog Stick |
| Player 2 | Move paddle up/down | Controlled by second player or AI |

===== Troubleshooting =====
==== Game doesn't appear in EmulationStation ====
Make sure you have a ''.game'' file (e.g. ''gong.game'') in ''/userdata/roms/gong/''. The file can be empty — it just needs to exist for EmulationStation to detect it.

==== Further troubleshooting ====
For further troubleshooting, refer to the [[:support|generic support pages]].