Magnavox - Odyssey2 / Phillips Videopac+ (O2EM)¶
O2EM is an open source multi-platform Odyssey2 / Videopac+ emulator. The Odyssey2 (Videopac/Jopac in Europe) was a video game console created in the late 70s.
The O2EM core has been authored by
- Daniel Boris
- Andre de la Rocha
- Arlindo M. de Oliveira
The O2EM core is licensed under
A summary of the licenses behind RetroArch and its cores can be found here.
Required or optional firmware files go in the frontend's system directory.
|o2rom.bin||Odyssey2 BIOS - G7000 model - Required||562d5ebf9e030a40d6fabfc2f33139fd|
|c52.bin||Videopac+ French BIOS - G7000 model - Required||f1071cdb0b6b10dde94d3bc8a6146387|
|g7400.bin||Videopac+ European BIOS - G7400 model - Required||c500ff71236068e0dc0d0603d265ae76|
|jopac.bin||Videopac+ French BIOS - G7400 model - Required||279008e4a0db2dc5f1c048853b033828|
Currently the libretro core only works with the o2rom.bin. As a workaround for playing Videopac+ games, you can rename the g7400.bin firmware file into o2rom.bin, and the core plays it correctly as a Videopac+ game.
Content that can be loaded by the O2EM core have the following file extensions:
RetroArch database(s) that are associated with the O2EM core:
Frontend-level settings or features that the O2EM core respects.
The O2EM core's library name is 'O2EM'
The O2EM core saves/loads to/from these directories.
Frontend's State directory
Geometry and timing¶
- The O2EM core's core provided FPS is 60 for NTSC games and 50 for PAL games
- The O2EM core's core provided sample rate is 44100 Hz
- The O2EM core's base width is 340
- The O2EM core's base height is 250
- The O2EM core's max width is 340
- The O2EM core's max height is 250
- The O2EM core's core provided aspect ratio is 4/3
The O2EM core has the following option(s) that can be tweaked from the core options menu. The default setting is bolded.
- Virtual keyboard transparency [o2em_vkb_transparency] (0%|10%|20%|30%|40%|50%|60%|70%|80%|90%)
|RetroPad Inputs||User 1 input descriptors|
|Action / Press Key (Virtual Keyboard)|
|Move Virtual Keyboard Up/Down|
|Show/Hide Virtual Keyboard|
|RetroPad Inputs||User 2 input descriptors|
In some games, for example UFO/Satellite Attack, the original had the joypads swapped so that Player 1 was on Joypad 2. If you only use one Joypad, a workaround is to provide identical assignments of both Retropads to one joystick and save it as Game Remap or Core Remap.
|RetroKeyboard Inputs||O2EM Inputs|
|Keyboard Minus -||-|
|Keyboard Period .||.|
|Keyboard Slash /||/|
|Keyboard Equals =||=|
|Keyboard Question ?||?|