LSI LSI20860 User Manual page 24

Host Adapter
Internal SCSI
Device
IRQ
Local Bus
Mainboard
Main Memory
Motherboard
Operating
System (OS)
PCI
Peripheral
Devices
Pin-1
Orientation
Port Address
A-2
A circuit board or integrated circuit that provides a SCSI bus connection
to the computer system.
A SCSI device installed inside the computer cabinet. These devices are
connected in a continuous chain using an unshielded ribbon cable.
Interrupt Request Channel. A path through which a device can get the
immediate attention of the computer's CPU. The PCI bus assigns an IRQ
path for each SCSI host adapter.
A way to connect peripherals directly to computer memory. It bypasses
the slower ISA and EISA buses. PCI is a local bus standard.
A large circuit board that holds RAM, ROM, the microprocessor, custom
integrated circuits, and other components that make a computer work. It
also has expansion slots for host adapters and other expansion boards.
The part of a computer's memory which is directly accessible by the CPU
(usually synonymous with RAM).
See Mainboard. In some countries, the term Motherboard is not
appropriate.
A program that organizes the internal activities of the computer and its
peripheral devices. An operating system performs basic tasks such as
moving data to and from devices, and managing information in memory.
It also provides the user interface.
Peripheral Component Interconnect. A local bus specification that allows
connection of peripherals directly to computer memory. It bypasses the
slower ISA and EISA buses.
A piece of hardware (such as a video monitor, disk drive, printer, or
CD-ROM) used with a computer and under the computer's control. SCSI
peripherals are controlled through a SCSI host adapter.
The alignment of pin 1 on a SCSI cable connector and the pin-1 position
on the SCSI connector into which it is inserted. External SCSI cables are
always keyed to ensure proper alignment. Internal SCSI ribbon cables
are sometimes not keyed, although they may have a colored strip
indicating pin 1.
Also Port Number. The address through which commands are sent to a
host adapter board. This address is assigned by the PCI bus.
Glossary of Terms and Abbreviations