The Rockchip RK3566 is the chip that made serious PSP emulation practical on a budget handheld. Across the Anbernic RG353M, RG353V and RG DS, it has the headroom to run PPSSPP — the open-source PSP emulator — at full speed on a great many titles. This work began on the widescreen OLED Anbernic RG503, whose…