We seen the RetroArch (Vita) updated recently which also has its own FBA (Final Burn Alpha) Arcade emulator (core), but a new fork has emerged recently from rsn8887 who has added some addional changes to PFBA (Vita) Emulator a release originally by Cpasjuste, This fork has a variety of changes for enjoying those classic Arcade hits, all additions and difference in this version of Portable Final Burn Alpha (pFBA) are outlined in the release notes:
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PFBA Vita_mod: Modded version of Portable Final Burn Alpha for the VitaChangelog of this modded version
Quick release with my additions/changes to Cpasjuste's awesome PFBA emulator for Vita.
Big thanks to Cpasjuste for a great codebase. This release page might be ahead or behind Cpasjuste's repository depending when pull requests are merged etc.

1.13
- PFBA: fix analog stick angular zone sizes (22.5 degrees per half zone now, e.g. eight 45 degree zones)
- PFBA: fix analog controls (broke in last release)
- PFBA: fix joystick controls with radial deadzone & symmetric diagonals
- PFBA: fix flickering borders if FIT is disabled
- PFBA: UniBIOS disables asm core only for Neogeo games
- PFBA: add option to change neo-geo bios (hyln9)
Note: For Unibios support, the file uni-bios_3_2.rom must be present in neogeo.zip
1.07
- pulled in latest changes by Cpasjuste as follows:
- PFBA: add option to configure menu(s) button(s)
- PFBA: add analog support (after burner 2, outrun...)
- PFBA: add NO_KEYBOARD flag to disable keyboard configuration
- FBA: fix wrong colors on konami games
- FBA: fix eeprom (nvram) loading/saving
- ARM: fix nec cpu (irem, raiden...)
- PFBA: fix readme.md suppression
- FBA: update to 0.2.97.40
- GUI: change menu code (use submenus, should improve smaller resolution systems)
- COMMON: add skin font size configuration
- added rotation options OFF+FLIP (flipped vertical for handheld portrait mode with pad at the bottom) and OFF+CAB.MODE (non-rotated controls for arcade cabs and vertical monitors)
- fixed FIT 4:3 option so it works even with rotation, and removed the now-unneeded FIT 3:4 option
- pulled in more changes by Cpasjuste, such as some speedup in SDL library and the re-instatement of smaller audio buffer to completely eliminate all audio lag.
- pulled all audio changes by Cpasjuste, sound seems to be perfect now on PS Vita.
- remove unneeded audio buffer hack
- reduce audio delay thanks to Cpasjuste, and I made a small change to it to hopefully eliminate the distortion/stutter
- support for multiplayer/multiple controllers on Vita TV. Controllers have to be paired before PFBA is started
- added "FIT 4:3" and "FIT 3:4" options to force the typical Arcade TV aspect ratio. Many Capcom games have strange resolutions but were designed to fill a 4:3 TV aspect ratio image. Strider and Final Fight are two examples. Without forcing 4:3 aspect these games will look stretched with too much widescreen.
Original Read-Me and additional details about PFBA can be found via this link
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