The eight diagrams of beginner's learning machine jumper settings

Do you know the DOS command parameters? For example, the dos dir command parameters, using dir/p will display a screen of directory information after the pause. These parameters are also called switches. Parameters or switches to users with a lot of flexibility, can adapt to a variety of different needs! Like software, hardware has parameters and switches can be set, hardware settings switch is called "jumper" (Jumper). Proficient in mastering jumper is one of the necessary technology of the machine.

First, understand the type of jumper

Up to now, the jumper has developed to three generations, namely the key cap type jumper, dip type jumper, soft jumper.

1. Key Cap Type jumper
The CAP jumper is made up of two parts: the base part and the key Cap section (shown in Figure 1). The former is two or three disconnected needles up upright, and the adjacent two pins determine a switch function. The operation of the jumper only has short and disconnected two types. When using a jumper, that is, a short jumper, will be able to allow two of the needle to connect the key cap to the two of them, so that two needles are connected to the function of the jumper should have. Otherwise, you can put the key cap on only one needle, and the other tube of the key cap is empty. Thus, because the two needles are not connected, the corresponding function is forbidden, and the key cap will not be lost. Because the key cap only means the connection, so there is no problem of inserting the counter. The key cap type jumper is divided into two stitches and three needles, two stitches are more convenient to use, the application is more extensive, short connection means to have a function, disconnect means to prohibit a function; The three needles are more complex, such as Needles 1, 2, 3, then short pin 1, 2 represents a function, and short 2, 3 represents another function.

2. Dip type jumper
Dip type jumper is also called dip combination switch, dip switch can not only use a button switch to express a function, but also can combine several dip switches to express more states, more functions. As shown in Figure 2, a dip switch can flip on both sides of the button to determine the two switch states, one side of the open (on), the other side of the off. And for the combination of the use of state, how many dip switches can represent the number of power of 2 of the state, there are how many values can be selected, so enter the DIP switch must be compared to the table in the manual set the value, otherwise you do not know so much state.

3. Soft jumper
The soft jumper does not have a real jumper, that is, the CPU-related settings are no longer using hardware jumpers, but are set through the CMOS Setup program (as shown in Figure 3), it is very convenient to not need to open the chassis at all.