queries the number of axes (number of continuous ranges which the joystick allows to choose
from) and buttons. The old version 0.* joystick protocol reports 2 axes (x and y) and 4 buttons
although the actual joystick will usually have less (often two) buttons.
svgalib supports up to 127 axes and buttons, provided the underlying device driver does it.
This function is only available in ELF versions of svgalib. Due to backwards
compatibility issues it cannot be used with shared a.out libs.
The svgalib joystick handler was mostly done by Daniel Engstr\"om <email@example.com>.
Multiple joystick, VC switching support and code to glue it into svgalib by Michael Weller
<firstname.lastname@example.org>. Part of the code is based on code from C. Smith and