systems:odyssey2 [Batocera.linux

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====== Magnavox Odyssey² ======
The Magnavox Odyssey² is a second-generation home videogame console developed by Magnavox - Philips, as a follow-up to the first home videogame console ever, the [[wp>Magnavox_Odyssey|Magnavox Odyssey]]. The Magnavox Odyssey² was released in 1978 for $179.99 USD ($475 in 2021).

This system scrapes metadata for the "odyssey2" group and loads the ''odyssey2'' set from the currently selected theme, if available.
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==== Quick reference ====
  * **Emulator:** [[#retroarch|RetroArch]]
  * **Core:** [[#libretro:_o2em|libretro: O2EM]]
  * **Folder:** ''/userdata/roms/odyssey2''
  * **Accepted ROM formats:** ''.bin'', ''.zip'', ''.7z''

===== BIOS =====
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There is conflicting information about whether BIOS is required or not!
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^ MD5 checksum ^ Share file path ^ Description ^
| ''562d5ebf9e030a40d6fabfc2f33139fd'' | ''o2rom.bin'' | Odyssey2 BIOS - G7000 model |
| ''f1071cdb0b6b10dde94d3bc8a6146387'' | ''c52.bin'' | Videopac+ French BIOS - G7000 model |
| ''c500ff71236068e0dc0d0603d265ae76'' | ''g7400.bin'' | Videopac+ European BIOS - G7400 model |
| ''279008e4a0db2dc5f1c048853b033828'' | ''jopac.bin'' | Videopac+ French BIOS - G7400 model |

===== ROMs =====
Place your Magnavox Odyssey² ROMs in ''/userdata/roms/odyssey2''.

===== 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.

Standardized features available to all libretro cores: ''odyssey2.videomode'', ''odyssey2.ratio'', ''odyssey2.smooth'', ''odyssey2.shaders'', ''odyssey2.pixel_perfect'', ''odyssey2.decoration'', ''odyssey2.game_translation''

^ ES setting name ''batocera.conf_key'' ^ Description => ES option ''key_value'' ^
^ Settings that apply to all cores of this emulator ||
| **GRAPHICS BACKEND ''odyssey2.gfxbackend''** | Choose your graphics rendering\\ => OpenGL ''opengl'', Vulkan ''vulkan''. |
| **AUDIO LATENCY ''odyssey2.audio_latency''** | Audio latency in milliseconds, turn it up if you hear crackles\\ => 256 ''256'', 192 ''192'', 128 ''128'', 64 ''64'', 32 ''32'', 16 ''16'', 8 ''8''. |
| **THREADED VIDEO ''odyssey2.video_threaded''** | Improves performance at the cost of latency and more video stuttering. Use only if full speed cannot be obtained otherwise.\\ => On ''true'', Off ''false''. |

=== libretro: O2EM ===
[[http://o2em.sourceforge.net/|O2EM]] is an open-source Magnavox Odyssey² emulator. This is the [[https://github.com/libretro/libretro-o2em|libretro port]] of that.

== libretro: O2EM configuration ==
^ ES setting name ''batocera.conf_key'' ^ Description => ES option ''key_value'' ^
^ Settings that apply to all systems this core supports ||
| **EMULATED HARDWARE ''global.o2em_bios''** | Choose what Odyssey/Videopac system to emulate\\ => Odyssey 2 (NTSC) ''o2rom.bin'', Videopac G7000 (European) ''c52.bin'', Videopac+ G7400 (European) ''g7400.bin'', Videopac+ G7400 (France) ''jopac.bin''. |
| **CONSOLE REGION ''global.o2em_region''** | To force 60hz or 50hz if the auto detection fail\\ => Autodetect ''autodetect'', NTSC ''NTSC'', PAL ''PAL''. |
| **SWAP GAMEPADS ''global.o2em_swap_gamepads''** | Some games accept player 1 input from controller 2\\ => Off ''disabled'', On ''enabled''. |
| **CROP OVERSCAN ''global.o2em_crop_overscan''** | Remove the border around the edges of the screen\\ => Off ''disabled'', On ''enabled''. |
| **GHOSTING EFFECT ''global.o2em_mix_frames''** | Simulate CRT phosphor ghosting effects\\ => Off ''disabled'', Simple ''mix'', Ghosting (65%) ''ghost_65'', Ghosting (75%) ''ghost_75'', Ghosting (85%) ''ghost_85'', Ghosting (95%) ''ghost_95''. |
| **AUDIO FILTER ''global.o2em_low_pass_range''** | Soften the hash sound effect from some games\\ => Off ''0'', 10% ''10'', 20% ''20'', 30% ''30'', 40% ''40'', 50% ''50'', 60% ''60'', 70% ''70'', 80% ''80'', 90% ''90''. |

===== Voice samples =====
New to Batocera **v32**, a recent update to [[#libretro:_o2em|libretro: O2EM]] added sample support for emulating the voice synthesis module. Download the samples from [[http://o2em.sourceforge.net/|O2EM's homepage]] (hover over "Misc" near the top of the page) and extract them into ''/userdata/bios/voice''. Sid the Spellbinder requires its own pack, but if you're not intending on playing that game they're not required.

To confirm they are loaded correctly, K.C.'s Krazy Chase! plays a voice sample almost immediately after starting a game.

===== Controls =====
The Magnavox Odyssey² used both a standard joystick controller with a single button and the built-in keyboard. The keyboard is already mapped to your default keyboard but most games utilized just the joystick.

In some games, for example UFO/Satellite Attack, the player order is swapped. This can be solved by switching the player order for the affected games, or by saving a [[:remapping_controls_per_emulator|manual remap]] with the controller IDs swapped.

Here are the default Magnavox Odyssey²'s controls shown on a [[:configure_a_controller|Batocera Retropad]]:

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