I assume you have a Raspberry Pi with a wireless network interface. So you want to have a static IP in the spare wired port of the rpi.
First of all 193.168 is not the best network for trying this, because it doesn't belong to a private range. I will use 10.1.1 in the example, it is the one I use in my own setup.
Edit the file /etc/network/interfaces of the rpi and change the eth0 section like this:
# rpi /etc/network/interfaces
auto eth0
iface eth0 inet static
address 10.1.1.1
netmask 255.255.255.0
I assume the other PC is a linux too, add a similar section with another IP. Notice this one ends in .2
# PC /etc/network/interfaces
auto eth0
iface eth0 inet static
address 10.1.1.2
netmask 255.255.255.0
Hope this helps.