E1
This is the basic telecommunications carrier in Europe. It
operates at 2.048 Mbps, compared to the U.S.A.'s T-1 1.544
Mbps.
ECC-RAM
Error-correction RAM can detect and correct single-bit errors.
ECD
The Enhanced CD disks mastered prior to 11/95 are incompatible with Windows 95's EDC device driver versions after 11/95 because the multimedia data is located on track "0" rather than located after the audio tracks.
ECHOPLEX - remote ECHO
Keyboard characters that you type are sent to the remote system which then "echoes" them back to your display screen. Because this process is slower than most people can type, expect delays between your keyboard typing and when you see what you typed (hopefully) on your display screen. You can type faster than the remote system can process your keystrokes. You can see transmission errors on your display screen (but you don't know if they were in the sending or receiving). This protocol is best for limited interactive communications.
ECHOPLEX - LOCAL ECHO
During communications with a remote system, keyboard characters are "echoed" on the display screen as you type them, and then sent to the remote system.
EDRAM
Enhanced DRAM (Dynamic RAM) chips from Ramtron.
EDO-DRAM
Extended-data-out "hyper-page" DRAM can perform page-mode accesses every memory clock cycle. Standard DRAMs permit accesses after several clock cycles have occurred; fast-page (page mode) DRAMs can be accessed at every other cycle. EDO includes a different kind of control logic connected to the chip's sense amps, which enables speeds as high as 40 MHz. These Memory chips are 10 times faster than DRAM , but only requires roughly 2 watts of power. (Used in the Apple's PowerBook G3.)
Burst EDO-DRAMs (BEDO-DRAMs) incorporate a burst mode for even faster data reads and writes. Note, EDO DRAM is incompatible with the PCIset chipset in Pentium Pro systems.
Note: PC What's The Problem? includes identification, installation and testing suggestions.
EIA/TIA Category Standards
There are two sources of specifications for cabling: IBM and the Telecommunications Industry Association (TIA), a branch of the Electronic Industries Association (EIA), which is often referred to as either the EIA/TIA or just EIA. IBM has its "Type" cable standards, and the EIA has its "Category" (or "Level") standards for unshielded twisted-pair (UTP) cables.
Other references: Cables and connectors, Instrument and Communications Cable, Computer Cable and Plenum Cable.
EIDE
This enhanced IDE (integrated Drive Electronics) standard is an intelligent controller that can support both hard and floppy drives, tape and CD drives. It uses an EIDE 40-pin cable interface (for PCI- or VL-bus systems).
EISA
This standard was developed as an alternative to IBM's PS/2 bus. Products with this label are compatible with computers that use the Extended Industry Standard Archecture expansion bus.
A systemboard's EISA bus slots are backward-compatible with boards designed for ISA slots. To the basic ISA connectors, EISA adds connectors to provide faster data transfers and greater control. Note: PC What's The Problem? includes signal assignments and functional troubleshooting suggestions.
EOTR
Extended Operating Temperature Range is -40°C to +85°C. (This is a feature not available with some oscillators.)
Standard temperature range is -10°C to +70°C, except in the "E" series (F1100E, F5C-2E, H5C-2E) where the standard temperature range is 0 to +70°C.
EPI
Enhanced Parallel Interface. Note: PC What's The Problem? includes signal assignments and functional troubleshooting suggestions.
EPP
Enhanced Parallel Port supports 600KB per second transmissions.
EPRML
Extended partial response maximum likelihood data encoding technique.
ESDI
Drives with this interface require its controller to be in sync with the speed of the hard drive; a second drive requires a second controllerboard. Drives do not require device-drivers. The ESDI interface's BIOS handles compatibility.
Theoretically the data transfer rate can be up to 24Mps. Specification supports a maximum drive capacity of 1GB. Although controllers with ST506 and ESDI interfaces place data on the systemboard's data bus in parallel, between the controller and drive (through the 20-pin data cable), data is transferred in serial, one bit at a time. The SCSI is a 50-pin parallel interface that transfers 8, 16, or 32 bits at a time. ESDI drives access DOS-based systems through interrupt 13 (INT 13). When formatting, use drive type-1.
Note: PC What's The Problem? includes identification, installation, testing and repair suggestions.
References are samples only. Each one is presented in greater detail in the
Technical Research Assistant for 2001
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Did you find any Inaccuracies?
Your EMAIL comments are invited
on CD in Adobe Acrobat PDF format
Book
Visit our
Enter the library through its Opening page
All rights reserved.
to top