Use4All2 Mod is an Amiga emulator for Vita and Switch.
Installation
* Download and unzip uae4all2_switch.zip
* Copy the resulting folder uae4all2 to /switch/ onto your SDCard, ensure none of the "archive" flags is set.
* You should now have the executable /switch/uae4all2/uae4all2.nro and a folder /switch/uae4all2/data/ with the keyboard icons and other data files on your SDCard.
* Obtain and copy BIOS files kick13.rom (Amiga 500), and kick31.rom (Amiga 1200) to your SDCard into /switch/uae4all2/kickstarts/.
* Optional: copy over additional BIOS files kick12.rom, kick20.rom, kickcustom.rom (for e.g. version 3.1.4 or any other user-supplied BIOS) to the same folder.
* Use nsp injection to start uae4all2, otherwise the config save as and savestate export options will not work. On SX OS, you can do this by holding down R while launching any installed game to make hbmenu appear.
* Full speed emulation of most Amiga games with zero frameskip
* Large, complete virtual keyboard with adjustable position and adjustable transparency
* Six fully mappable custom control sets: map Vita/Switch buttons to any Amiga joystick or key input
* Multiple hard-file support: up to 4 hdf files (size <2GB each on Vita, size <4GB each on Switch) can be mounted simultaneously
* Multiple controller support on Vita TV/Switch: up to four (eight on Switch) paired controllers can be fully mapped
* Analog mouse control: control the mouse using the analog stick with adjustable sensitivity
* Shader support: default "sharp_bilinear_simple" uses integer pre-scale for sharp, undistorted pixels with minimum blur, even if game is zoomed to fill the full screen
* Custom autofire: any mapped Vita/Switch button can have autofire with adjustable rate
* Savestate with hard-file support: state can be saved even when hard-files are used
* Additional emulator settings: sprite-sprite collisions can be enabled, blitter settings can be changed
* Adjustable stereo separation
* A button can be mapped to "slow mouse" in custom controls. When custom controls are on and that button is held down, the mouse pointer speed is greatly reduced. This is useful for precisely positioning the cursor.
* Sticky virtual keyboard modifiers: allows keyboard combos like CTRL-C to be entered easily
* Touchpad style pointer controls using the touchscreen
* Parallel port joystick adapter support for multiplayer games with up to 4 joysticks.
* Additional savestate slot called auto, for automatic savestate loading
* Physical keyboard and mouse support (Bluetooth on Vita, USB on Switch)
* Supports loading files from ux0: or uma0: partition (Vita only)
* Rear touch panel can be enabled for mouse pointer control (Vita only)
* Split Joy-Con support (Switch only)
* A "fast mouse" custom button can be mapped to speed up the mouse
* Automatic full 1080p support in docked mode (Switch only)
* Savestate import/export to backup savestates
* Config file management (load, save as, etc.)
* Thumbnail previews for savestates
* Four different on-screen keyboard styles: original, warm, cool, and dark
* On-screen keyboard keys can be pressed via touch input in addition to dpad navigation
On the Switch, since v1.84, please use Application mode, not Applet mode, to start uae4all2, otherwise the config save as and savestate export options will not work. You can do this by holding down R while launching any game to make hbmenu appear in Application mode. In other words: launch uae4all2 via game, NOT via Album.