| A | B |
|---|
| drive interface | Collection of electrical and logical connections between a hard drive and a PC. |
| ST-506 interface | legacy drive interface still in use today |
| ESDI | drive interface similiar to the ST-506 interface that provides increased performance over the ST-506 |
| termination | process of properly ending a chain of ESDI or SCSI disk drives by installing a terminating resistor |
| SCSI | drive controller that provides high-performance data transfer between the hard drive or other SCSI device and the other components of the computer |
| LUN | a unique identifier for sub-devices assigned to a single SCSI ID |
| single-ended device | SCSI device that uses a single wire for each bit of data |
| HVD | SCSI device that uses two wires, one for data, and one for inverse data. cant be used on a single-ended SCSI chain and use high voltage |
| LVD | SCSI devise that two wires, one for data, one for inverse data. can be used on a single-ended SCSI chain and use low voltage |
| IDE drive interface | drive interface that provides inexpensive, high-speed data transfere between the hard drive or other IDE device and the other components of the computer. |
| LBA | used to support increased capacity of IDE drives to over 504 MB, up to 8.4 GB. |
| CHS | used to manually configure hard drives smaller than 504 MB. |
| ECHS | enables use of hard drives up to 8.4 GB. |
| enhanced IDE (EIDE) | provides support for larger hard drives, additional device conections, CD-ROMS, and ATI drives. |
| PIO mode | indicates the speed of data transfere between two devices that use the computers processor as a part of the datapath |
| UDMA | provides transfere speeds of up to 100 Mbps |
| display adapter | PC expansion board that converts the images created in the comouter to the electronic signals required by the monitor |
| monitor | display screen use to present output from a comouter |
| MDA | first IBM PC monochrome video display standard for text only |
| TTL | monitor that uses transistor-transistor logic signals |
| Hercules graphics | monochrome display adapter capable of producing both high-resolution monochrome graphics and text |
| CGA | IBM video display standard that provided low-resolution text and graphics |
| EGA | early IBM video display standard that provided medium-resolution text and graphics |
| VGA | the minimum standard for PC video display |
| Sound card | internal card used to convert digital signals to sound waves |
| MIDI | interface that allows you to connect and control electronic musical devices. |
| modem | device that adapts a comp. to analog telephone line converting digital pulses to audio frequencies and vise versa |
| asynchronous | bit synchronization transmission technique that uses start and stop bits |
| synchronous | transmission of a bit stream of data where the transmitter and receiver are synchronized |
| MNP | five modem standards offering different levels of error correction and detection |
| at commands | modem command set developed by the Hayes company for use on its modems and now used on most modems |
| UART | component that controls asynchronous serial communications |
