Virtual Joystick

When sdlBasic don't detect a real joystick attached to your pc a virtual joystick is emulated by using the keyboard.
Keys

Virtual joystick ergonomy is based upon the GP2X handheld device.
Here a picture of the device.
GP2X handheld device
direction are emulated by arrow keys or, in alternative, the keys on numeric pad.
left and right shift keys emulates the two front buttons
Keys A S D F emulate buttons A B X Y
Page Up and Down are used to emulate volume buttons
Select and Start are emulated using Keys ? ?