Rambus <RDRAM>

Alias:
Ram bus
Field:
Semiconductor > memory > RAM > Rambus

DRAM which adopts the high-speed interface technology “Rambus” which the Rambus corporation developed. As for bus width 8 bits. 600 - To 700MHz and the emergency to operate at high clock frequency, as for transfer rate 600 - 700MB/s. VRAM and the Nintendo Co. game machine “NINTENDO 64” of the video card, in the SONY game machine “PlayStation 2” it is used. From high speed as for Direct RDRAM which adopts Direct Rambus technology, being adopted for the main memory of the personal computer which is substituted to SDRAM was planned, but in the market DDR SDRAM is becoming main current. Direct RDRAM operates with 800MHz, maximum transfer rate is 1.6GB/s.

RAMDAC

Reading: Ram duck
Full spelling: Random Access Memory Digital/Analog Converter
Field:
Semiconductor > memory > RAM > RAMDAC
Personal computer > extended card > RAMDAC

As been able to indicate the digital data which is accumulated on the video card of the personal computer, in display, it is the device which is converted to the analog signal. There are times when the reference listing which the color data and signal level correspondence is attached is used the case of conversion, they are called RAMDAC from the fact that this chart is retained in RAM.

RapidIO <Rapid IO>

Reading: Rapid eye o
Field:
Personal computer > I/O > RapidIO

Communication interface inside computer (bus) one. The Motorola corporation and the Mercury Computer Systems corporation being joint, being something which was developed, it was announced in 2002 February. RapidIO Trade of the economic organization Association (RTA) has managed standard.

To connect between various tips/chips such as inside the baseplate of the computer at high speed above 10Gbps it is possible RapidIO. High speed we are adopted with communication equipment, such as rooter and the switch which correspond to network communication high speed the dedicated device of the specific use where interface is needed (we install to in addition to and the equipment) with are used.

Also compatibility of the PCI bus which is utilized widely with the personal computer and the like is considered, also coexistence with the old PCI equipment has become possible by the fact that the PCI interchangeable controller is built in.

RAR

Reading: Ra
Field:
Expression of information > data compression > RAR

One of general-purpose reversible file compressed type. Eugene Roshal developed with the type which was used with the application “of RAR” “WinRAR” and so on, presently is supported with the various software.

Integrating the file where bulk compressibility is higher than LZH type and Zip type, divides the data compressed file into the plural files of optional size, is divided, from the fact that it can thaw, it reached the point where it is widely used in bulk file exchange on the net. There is also a function which adds electronic signature to the data compressed file.

RARP

Reading: [rapu]
Full spelling: Reverse Address Resolution Protocol
Field:
Network technology > TCP/IP > RARP

In TCP/IP network, although IP address is calculated from the physical address (MAC address) of Ethernet, the protocol which is used. As for calculating physical address on the basis of IP address ARP.