System Startup, Configuration, and Shutdown Reference Manual (32650-90892)

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channel A path within a data communications line through which data flows.
channel I/O (CIO) Input/output instructions for a channel.
channel I/O adapter A device that provides the interface between the central bus (CTB)
and the channel I/O buses. Each channel I/O adapter serves as a high performance channel
multiplexer providing a full direct memory access (DMA) for all HP-IB and LAN I/O
channels and synchronizing the differing speeds and bandwidths of the CTB and channel
I/O buses.
channel I/O bus (CIB) A device that provides a synchronous bi-directional data path
between the central bus (CTB) and I/O devices.
channel number The number assigned to the device controller board in the I/O card
cage. It is used to calculate the logical address of the device, or device reference table
(DRT) number.
CIO adapter (CA) The interface slot number containing the adapter for the CIO Bus and
central bus (CTB).
CIO expander The channel input and output expander that provides eight additional
peripheral card slots to the SPU.
class A user-defined collection of objects.
class name 1) A label that is either unique to, or associated with, one or more devices in
the system's I/O configuration, used to reference a particular device or class of devices.
Device class names may be up to eight alphanumeric characters long, beginning with a
letter. A single logical device can have multiple device classnames. The HP 2680 laser
printer, for example, is referred to as EPOC (electrophotographic output for computers), PP
(page printer), or SLP (system line printer). Directing output to any of these class names
sends the output to a laser printer. 2) An abstract entity that can own objects in an HP
SQL DBEnvironment. 3) A set of one or more SQL or ISQL commands in a file that can be
executed with the ISQL START command.
command interpreter (CI) A program that reads command lines entered at the
standard input device, interprets them, determines if they are valid, and if so, executes
them.
communication link The software and hardware that moves data from the driver and
card of one computer to the driver of an adjacent computer.
compatibility The ability of software developed for one computer to work on another
computer. See compatibility mode.
compatibility mode (CM) A method of providing object code compatibility between MPE
V/E-based systems and the 900 Series HP 3000 system. Compatibility mode allows current
Hewlett-Packard customers to move applications and data to the 900 Series HP 3000
system without changes or recompilation.