Overview

This section lists the requirements for incorporating extended joystick support in titles development, and compares the features of various versions of the extended joystick. Topics include:

Requirements

Requirements for incorporating extended joystick support in titles development include:

Features of the Extended Joystick

The three-axis, extended joystick manufactured by CH Products offers the following features:

The table below provides a description of the features available on various versions of the extended joystick:

Table 1:   Joystick versions and features.
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Feature          |Description                              
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4 single buttons |Includes one fire button in the index 
                 |finger position,and three additional 
                 |buttons (A, B, and C) on the extended 
                 |joystick handle.                         
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4Ðway switch     |Located in thumb position. The consumer 
                 |extended joystick comes with a single   
                 |4-way switch, or 4 single buttons 
                 |placed in a diamond pattern.  
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x and y axis     |Consumer versions of the extended    
movement         |joystick are permitted a maximum of   
                 |10-bit precision in each direction.
                 |8-bit precision is the minimum allowed.                 
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Auxiliary axis   |Consumer versions of the extended    
control          |joystick are permitted a maximum of
                 |10-bit precision in each direction.
                 |8-bit precision is the minimum allowed.     
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Left-shift,      |These features are implemented with  
right-shift,     |single buttons mounted on the base of 
stop, play/pause |the extended joystick.
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Figure 1 shows the placement of controls on the extended joystick.

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Figure 1: Extended joystick controls.

Bit Order

When 8-bit precision is used, the two least-significant bits are padded with zeros to fill all 10 bits available, as shown in Figure 2.

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Figure 2: Bit layout for 8-bit precision.