Bull ESCALA E250, Использование и обслуживание, Страница: 149 / 162

G-3
Glossary
K
KBB: It is a card that provides three RS-232 lines
and one parallel line. It is also connected to the
FSB card by means of a dedicated flat cable.
KDD: A card installed in the disk expansion unit
and interconnecting all the disk expansion unit
resources. It manages also the input and output
RS-485 connection between the base unit and the
disk expansion unit(s).
KDK Complex:
It is composed by the KDK card
and four flat cables connected to it. Its main
functionality is to define the hard disk drive SCSI-ID.
key mode switch: Key controlled switch which
controls the system operation mode.
KHS: An optional card to be installed in presence
of a RAID configuration. It interfaces the RAID
controller card.
KIO: I/O expansion. A connector on the system
planar, reserved for future use.
KOP: See operator panel.
KPS: See power supply.
L
LAN:
Local Area Network.
LCB:
Link Controller Board.
LCR:
Line Control Register.
LED: Light-Emitting Diode.
LMB: Local Memory Board.
LSB: Low Significant Bit.
LVD: Low Voltage Differential.
M
MCR: Modem Control Register.
MDP:
Memory Data Path.
media and disk device areas:
Areas which house
the media drives and the hard disk drives.
memory bank:
The minimum quantity of memory
used by the system. It physically consists of four
memory DIMM’s. See also DIMM and riser.
MFG: Manufacturing.
MLR: Multichannel Linear Recording.
MP: MultiProcessor.
MPIC: MultiProcessor Interrupt Controller.
MRS: See riser.
MSB: Most Significant Bit.
multimedia: Information presented through more
than one type of media. On computer systems, this
media includes sound, graphics, animation and
text.
multitasking: The ability to perform several tasks
simultaneously. Multitasking allows you to run
multiple applications at the same time and
exchange information among them.
N
NVRAM: Non Volatile Random Access Memory.
NVRAMRC: The area where Open Firmware
user-defined commands are stored.
O
OF:
See Open Firmware.
OP:
See operator panel.
Open Firmware: An architecture for the firmware
that controls a computer before the operating
system execution. It also provides a user-interface.
operator panel (KOP): The system panel where
the 3-digit hexadecimal display and key mode
switch are located.
operating system: The software which manages
the computer’s resources and provides the
operating environment for application programs.
OUT(n): Output signal number.
P
PCI: Peripheral Component Interconnect. A bus
architecture that supports high-performance
peripherals such as graphic boards, multimedia
video cards and high-speed network adapters.
PID: Product IDentification.
POST: Power On Self Test.
PowerPC: A standard RISC microprocessor
family.
power supply (KPS): The system base unit is
equipped with a power supply module, providing
power and power regulation to all the system
components. Optionally the redundancy features
can be provided. See redundant power supply.
PPI: Parallel Port Interface.