Cascade Query Code; Resolving Slow Mouse Problems - ADDER View DVI AV4DVI Installation & Use Manual

4.8 Cascade query code

The AdderView DVIs use a special 'query code' to detect whether or not they are
connected to another AdderView DVI. By default your AdderView DVI uses query
code AD. SmartView (another range of keyboard / mouse / video switches from
Adder Technology) units with firmware versions less than 1.09 used query code EF.
This was found to conflict with a small number of other (rare) devices that used the
same query code so an alternative query code was provided to ensure compatibility.
Either query code may be used but you should make sure that all cascaded
AdderView DVI and SmartView units are set to use the same query code. If any of
the cascaded SmartViews have firmware versions less than 1.09 then the cascade
query code for all the AdderView DVIs and SmartViews should be set to EF.
L7 – Cascade query code = AD (default)
L8 – Cascade query code = EF

4.9 Resolving slow mouse problems

Due to certain technical reasons some systems running particular combinations of
operating system and mouse drivers are sensitive to small timing changes relating to
mouse communications. The introduction of a switch like the AdderView inevitably
causes some timing changes and in rare cases interactions have been observed
that causes the mouse to run very slowly. Certain HP Vectra computers running
later versions of Windows NT with Logitech mouse drivers and Logitech mice have
been observed to exhibit such interactions with older switches. One solution to this
problem is to change the mouse driver.
The AdderView DVI is a high performance device that is carefully engineered to
minimise such interactions and should not exhibit this characteristic. Nevertheless
such interactions are unpredictable and so the AdderView is fitted with a feature that
ensures that the mouse can never operate at a very slow rate regardless of such
interactions. This feature is activated using the following options:
L5 – Allow the mouse to run at any speed (default)
L6 – Don't allow the mouse to run at very slow speeds
AdderView DVI Installation and Use Page 34