Keyboard (DIN Connector)

Simplified drawing, view upon:

      Socket                    Plug
      
     3       1                1       3
      5     4                  4     5
         2                        2

PS/2 Keyboard

Simplified drawing, view upon:

  Socket           Plug
  6 o 5            5 o 6
 4     3          3     4
   2 1              1 2

Please note, that the counting of these connector pins may be different in some cases!

Mouse

The theme "mouse at the PC" is very complicated. First you have to observe that there are many different types of mice available. There is the serial mouse (with 9pin or 25pin D-Sub connector, which by now is hard to find anymore), there is the PS/2 mouse and combined mice, which can be differentiated by the expression "PS/2 - Serial Mouse" and the fact that an adapter is supplied (Mini-DIN to 9pin D-Sub). Finally there are USB mice and combined USB/PS2 mice which again have a supplied adapter USB to PS2. The transmission protocols of the serial, PS/2 and USB mice and the electrical features of there interfaces are very different! For combined mice the interface and protocol is internally switched to the appropriate version after detecting the interface. Older mice may have a little switch for this! But pay attention, there are mice which have a switch to select between the "Microsoft" and "Mouse Systems" serial protocol. It is important to use the supplied mouse driver of the manufacturer to achieve the correct functionality. If you are lucky the operating system will automatically detect the mouse correctly and use a suitable standard driver.

Make sure that you know what kind of mouse you have or need. Mismatches can even damage your mouse or PC. Any any case use the adapter and driver which was supplied by the manufacturer.

In spite of the complexity of the issue some pin assignments of important mouse types will be given here. Here is also a good description of how mice work.

 plug (male connector at PC)        socket (female connector at mouse cable)
 +-------------+                    +-------------+
  \ 1 2 3 4 5 /                      \ 5 4 3 2 1 /
   \ 6 7 8 9 /                        \ 9 8 7 6 /   
    +-------+                          +-------+

    Socket          Plug
    6 o 5           5 o 6
   4     3         3     4
     2 1             1 2

USB Plug

Network Cables 10MBit/100MBit

Crossover cable for the direct connection from network card to network card without hub, e.g. for a peer to peer network of 2 PCs.

You have to observe, that the wires of the wire pairs TD+ / TD- and RD+ / RD- are twisted with each other. jeweils verdrillt sind. It is recommended to use a proper CAT. 5 cable.

For a 100MBit full duplex connection without hub you can use the following cable. Here also the wires of the wire pairs have to be twisted, or a CAT 5 cable has to be used.