Set of tools to run PS Vita game dumps from SD card or from binary image, have been published by Motoharu on GITHub.
Of course Cobra BlackFin for Vita was the first product to do so, but it was never updated for newer firmwares and being commerical it was of course not open-sourced, but Motoharu a long time ago reserve-engineered most of BlackFin and designed a hardware adapter and code to dump the PS Vita games themselves directly from their Gamecard, and now recently XYZ demoed a working PoC of running an microSD as Vita gamecard with a rough adapter, and since then Motoharu has published all his dumping info and codes.
OFFICIAL SITE: --> https://github.com/motoharu-gosuto/psvgamesd
There is still just under 4 weeks to go before the big release of the permanent Henkaku called Ensō, hopefully by then all drivers and plugins needed to directly support microSD on Vita will be included as part of package, and I have recently hear rumors that XYZ has ordered a 'ton' of a finished 1mm build design that will work perfectly on all Vita's, so we may soon see everyone with hackable Vita having cheap memory space to run all their homebrew and game backups. -- Now all we need after this is support for newer v3.65!
NEWS SOURCE: Les avancées sur la microSD sont à créditer à Motoharu (via) Logic-SunRise