Trackball Control - Hagstrom KE-USB108 User Manual

Buffer overflow:
This option controls the buffering of pulses for the rotary input. In
cases where the rotary encoder switch produces inputs faster than
the keystrokes are sent out, the new input changes will be buffered
or ignored based on this setting. When this option is disabled
(default state), incoming switch pulses will not be buffered. Once
a change on the rotary input is detected, any new changes from
that rotary input are ignored until the unit has output the previous
keystroke to the PC. When the buffer option is enabled, the
incoming pulses will be buffered such that each input change will
result in a corresponding output pulse. Rotary inputs are buffered
up to 64 keystrokes per rotary encoder switch. The buffer overflow
option is selected by using the dropdown menu. Valid selections
are either disabled or enabled.

Trackball Control

The section labeled "Trackball
Control" is used for adjusting
trackball movement. Based on
the type of trackball being used,
one or both of the "Reverse Axis"
check boxes may need to be selected in order to obtain the proper
left-right or up-down movement from your trackball. Should the
trackball move the cursor up when it should go down, check the
Reverse Y Axis box. Should the trackball move left when it should
move right, check the Reverse X Axis box.
USB Connector Trackball Jumper
18
Trackball Jumper:
The KE-USB108 provides
a three position header in
the lower left hand corner
of the board (see picture to
the left).