I decided to buy a Dualshock 4 and see for myself what works and what doesn't.
First off: As promised, the Dualshock 4 works on Windows without the need to install additional drivers.1 Connection is established via a Micro-B USB cable, or via Bluetooth on computers with a Bluetooth receiver. (Hold down the Home and Share buttons together for several seconds to enable Bluetooth pairing mode. The light bar will continuously flash when pairing mode is activated.)
Game support is extremely lacking. The Dualshock 4 is a DirectInput device while the Xbox 360 controller uses XInput, which is the only API that most - if not all - modern games use. In order to use the Dualshock 4 in games that only support the Xbox 360 controller, a wrapper is needed2. Here's to hoping Sony will release drivers to add XInput support to the Dualshock 4.
As for the default key-mapping; even if games accept input from the Dualshock 4, you might want to calibrate the controller to match the Xbox 360 controller's key mapping.
Matching inputs are:
- Left analog stick: main X/Y Axis
- D-Pad: Point of View Hat
- Y/
: button 4
- LB/L1: button 5
- RB/R1: button 6
The Xbox 360 controller uses 3 Axis and 2 Rotations as input for its two analog sticks and 2 triggers; the triggers both share the Z-Axis.
The Dualshock 4 on the other hand uses 3 Axis and 3 Rotations for the same.
According to Windows' very own Game controller settings:
The Xbox 360 offers a total of 10 buttons3.
The Dualshock 4 offers a total of 14 buttons4.
1: Tested on Windows 7 and 8.1
2: I found one such wrapper here
3: Excluding the home button, which does not seem to map to a controller input
4: 2 buttons are mapped to the L2/R2 triggers, which are also mapped to the X and Y Rotations
You first need to change the settings on your PS4 so that you can connect to the Internet while in Standby mode. Then, when you're done playing with the PS4, always put it on stand-by. When you buy something from the store, you will also need to "Queue" the download to your console. You can do this from the "Download List" on the Store.
Best Answer
For majority (if not all) PS1/PS2 titles, the Touchpad has been mapped for use as the Select/Start buttons.
For Mega Man Legacy 2 Collection in particular, the manual suggests the entire touch pad is the Start button.