Other Useful Installation Information; Re-Enabling A Disconnected Ps/2 Mouse - ADDER GEMAV2GEM Installation And Use Manual

2.9 Other useful installation information

PC boot up sequence - When your PCs are powered on they communicate with
any attached keyboards and mice and setup parameters required by the particular
operating system. It is necessary for the AdderView GEM to be attached and
powered on during this sequence so that it can give the required responses and
keep track of all the modes and settings requested by each of the connected PCs.
Mouse characteristics - do not unplug a PS/2 mouse connection from a PC whilst
the PC is on. Due to the design of PS/2 mice communications the mouse function on
the PC will be lost and you will have to re-boot the PC to regain normal operation.
Unplugging the mouse from the AdderView GEM will also cause it to stop operating
when it is plugged back in. RS232 mice can usually be unplugged and plugged back
in provided that a mouse was connected when the operating system initially booted.
The AdderView GEM is fitted with a PS/2 mouse recovery system which allows you
to disconnect and re-connect the shared mouse without powering down the system
(although this is generally not advisable) - see section 2.10 for details.
Keyboard and mouse mode switching - The AdderView GEM keeps a log of the
keyboard and mouse mode and resolution settings requested by each of the
connected PCs. These settings are automatically restored to the shared keyboard
and mouse when the AdderView GEM channel is switched thus ensuring maximum
software compatibility. The keyboard num, caps and scroll lock states are an
obvious example of this process.

2.10 Re-enabling a disconnected PS/2 mouse

If you disconnect the shared PS/2 mouse from the AdderView GEM by accident
during operation then the mouse operation will be lost when the mouse is plugged
back in. To avoid having to reboot the entire system in this situation the AdderView
GEM is fitted with an automatic mouse recovery system.
With the PS/2 mouse disconnected, change the channel using the keypad or
keyboard hotkeys. The AdderView GEM detects that the mouse has been
disconnected and triggers the automatic recovery system. Plug in the PS/2 mouse
and the AdderView GEM will re-initialise it.
AdderView GEM Installation and Use Page 15