суббота, 14 февраля 2009 г.

REGISTR

Register CPU - ultra-fast memory inside the processor, designed primarily to store intermediate results of computation (general purpose register / data register) or containing the data necessary for the processor - deflection basic spreadsheets, access levels, etc. (special case). 

Access to the values stored in registers usually several times faster than access to the cells of memory (even if the cache memory contains the necessary data), but the amount of RAM is more than the total volume registers (the average amount of memory module is now 1 GB - 4 GB [1], the sum of «tank» general-purpose registers / data to the processor 16-bit Intel 80x86 * 4 = 64 bits (8 bytes)). Operations Registers 

Typical are the following: 
welcome speech to the register; 
channel word from the register; 
porazryadnye logical operations; 
shift words left or right a specified number of bits; 
conversion of serial code words in parallel, and vice versa; 
Installation of the register in the initial state (reset). Classification registers 

The registers are classified into the following types: 
storage (memory, storage); 
shear. 

In turn, shear registers are: 
by way of input-output data: 
• Parallel - recording and reading of information takes place simultaneously at all inputs and all outputs; 
• consistent - write and read information is on the first flip-flop, and the information that was in the trigger, is rewritten in the following - the same thing happens with the other triggers; 
• Combination; 
in the direction of information transfer: 
• single; 
• reverse. 
on the base number system 
binary 
ternary 
desyatichnyeyu

REGISTR

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