| Terminology means Technical Definition, here are some terminologies used for computers, they are categorized alphabetically, either you scroll down the page until you reach the terminology you wants, or it would be easier to click the terminology you want from the list. I hope you like this page and make a good use of it, also there will be an updates in the future, you may visit it regularly. | |
|
|
| Letter E : | EDO Ram - EDRam - EISA - EPP / ECP - EPROM |
| EDO Ram |
|
| Extended
data output (EDO) RAM is a type of random access memory (RAM) chip that improves the time
to read from memory on faster microprocessors such as the Intel Pentium. EDO RAM was
initially optimized for the 66 MHz Pentium. For faster computers, different types of
synchronous dynamic RAM (SDRAM) are recommended.
|
|
| Selected Links | |
| Tom's Hardware Guide includes The RAM Guide. | |
| Kingston
Technology's The Ultimate Memory Guide is another source of information.
|
|
| EDRam |  |
| EDRAM
(enhanced dynamic random access memory) is DRAM (dynamic or power-refreshed RAM) that
includes a small amount of static RAM (SRAM) inside a larger amount of DRAM so that many
memory accesses will be to the faster SRAM. EDRAM is sometimes used as level- 2 cache
memory. Data that has been loaded into the SRAM part of the EDRAM can be accessed by the microprocessor in 15 ns (nanoseconds). If data is not in the SRAM, it can be accessed in 35 ns from the DRAM part of the EDRAM.
|
|
| Selected Links | |
| Also see Memory for a general
discussion of memory technologies.
|
|
| EISA | |
| EISA is a
standard bus (computer interconnection) architecture that extends the ISA standard to a
32-bit interface. It was developed in part as an open alternative to the proprietary Micro
Channel Architecture (MCA) that IBM introduced in its PS/2 computers. EISA data transfer can reach a peak of 33 megabytes per second.
|
|
| EPP / ECP | |
| EPP/ECP
(Enhanced Parallel Port/Enhanced Capability Port) is a standard signaling method for
bi-directional parallel communication between a computer and peripheral devices that
offers the potential for much higher rates of data transfer than the original parallel
signaling methods. EPP is for non-printer peripherals. ECP is for printers and scanners.
EPP/ECP are part of IEEE Standard 1284, which also specifies support for current signaling
methods (including Centronics, the de facto standard for printer communication) so that
both old and new peripherals can be accommodated. The new standard specifies five modes of data transfer. Three of them support the older mono-directional modes (a forward direction method from PC to Centronics printer and two reverse direction methods from peripheral to the PC). The fourth and fifth modes, EPP and ECP, are bi-directional (half-duplex) signaling methods, meaning that they are designed for back-and-forth communication. Partly because these are being implemented in hardware, EPP and ECP will provide much faster data transfer. The first three methods offer an effective data transfer rate of 50 to 100 kilobytes per second. EPP and ECP offer the possibility of rates "in excess of 1 megabytes per second," according to Warp Nine, a chip manufacturer. In order to get the maximum advantage of EPP/ECP, both operating system (or an I/O port controller, or both) and peripheral device must support the standard. Initially, you may get the best effect from EPP and a Zip drive. Even printers that support ECP are limited by the mechanical aspects of printing. Nevertheless, even users of the compatibility modes of Standard 1284 are also expected to see some benefit in data transfer to and from peripherals. Currently, Windows 95 has built-in support for IEEE 1284 in its parallel plug-and-play feature. It also supports ECP in forward direction, assuming you have a printer and a parallel port with ECP. IBM is planning to add 1284 support to its OS/2 operating system. It is likely that other vendors will provide ECP or EPP software for other operating systems.
|
|
| Selected Links | |
| Warp Nine offers an IEEE 1284/EPP/ECP Frequently Asked Questions. | |
| IEEE
standards can be ordered from the Store at IEEE.
|
|
| EPROM | |
| EPROM
(erasable programmable read-only memory) is programmable read-only memory (PROM) that can
be erased and re-used. Erasure is caused by shining an intense ultraviolet light through a
window that is designed into the memory chip. (Although ordinary room lighting does not
contain enough ultraviolet light to cause erasure, bright sunlight can cause erasure. For
this reason, the window is usually covered with a label when not installed in the
computer.)
|
|
______________________________________________________________ |
|
| Designed
By Wessam Sherif, All Rights Reserved.
|
|