Introduction to Computer Science

1, the computer's five major units:

2.CPU points: Simplified instruction set RISC, complex instruction set CISC x86 architecture.

Capacity units: K, M, G, T, P

speed unit : CPU Operation unit Mhz,ghz,hz is actually one of the seconds. In the network transmission aspect, because the network uses bit as the unit, therefore the network commonly uses the unit to be Mbps is Mbits per second, namely is how many Mbit per second. For example, we often hear the 8m/1m ADSL transmission speed, if converted into a file capacity of byte, in fact, the theoretical maximum transfer value is: 1mbyte/per second 125Kbyte upload/download capacity Oh!

< Span style= "font-family: New fine Ming body, ' Times New Roman ', serif; font-size:15px; Background-color:rgb (255, 255, 255); " >3, The chipset is usually divided into two bridges to control the communication of the components, namely: (1) North Bridge: Responsible for connecting the fast CPU, main memory and display cards and other components, (2) South Bridge: Responsible for the slow connection of the peripheral interface, including hard disk, USB, network card and so on.

4, the CPU efficiency has micro instruction set and frequency decision.

CPU developers in the CPU plus an acceleration function, so the CPU has so-called FSB and octave!

The so-called FSB refers to the CPU and external components of the speed of data transmission, octave is the CPU used to speed up the performance of a multiple, the two are multiplied is the CPU frequency speed . We have just Intel Core 2 Duo E8400 CPU, his frequency is 3.0GHz, and FSB is 333MHz, so the octave is 9 times times rom! (3.0G=333MX9, of which 1g=1000m)

< Span style= "font-family: New fine Ming body, ' Times New Roman ', serif; font-size:15px; Background-color:rgb (255, 255, 255); " >5, The bandwidth of the system bus is: "FSBX system bus width" that is, the maximum amount of data that can be transmitted per second. The current common system bus width is 32/64 bits (bits).

< Span style= "font-family: New fine Ming body, ' Times New Roman ', serif; font-size:15px; Background-color:rgb (255, 255, 255); " >cpu The amount of data that can be processed each time is called the word size, which is 32 bits and 64 bits based on the CPU's design. What we now call the computer is 32 or 64 bits mainly based on this CPU parsing the word grew small and come from the In the early 32-bit CPUs, the amount of data coming from the main memory was limited because the CPU was able to parse the amount of data each time.

< Span style= "font-family: New fine Ming body, ' Times New Roman ', serif; font-size:15px; Background-color:rgb (255, 255, 255); " >6, The second-tier cache (L2 cache) is integrated into the CPU. The computer will read the read-only memory cmos in Bios, load the parameters in the CMOS and try to call the boot program in the storage device.

7. HDD:

Introduction to Computer Science