MPE/iX Glossary of Terms and Acronyms (32650-90887)

36 Chapter1
Glossary of Terms
input priority A number in the range of 1 (lowest priority) to 14 (highest priority)
assigned to input jobs. The input priority can be assigned by the system
(default is 14) or by the user. Jobs with an input priority less than or equal
to the system jobfence (default 8) are deferred.
INSTALL The MPE/iX Initial System Loader (ISL) INSTALL utility performs a
system load from tape and builds essential operating system files and data
structures on disk. Equivalent to the MPE V/E RELOAD operation.
instruction cache A high-speed cache implemented on the 900 Series HP 3000. It
operates in parallel with the data cache to enhance processing efficiency.
For example, data can be loaded from the data cache while the next
instruction is fetched from the instruction cache. See data cache.
instruction set The set of all possible machine instructions understood by the computer.
instruction unit A part of the MPE/iX CPU to control instruction sequencing. It
executes branch instructions, maintains processor status, and handles
traps and interrupts.
integer A data type that is either a positive or negative whole number, or zero.
integer value A sequence of digits preceded by a plus sign (+), minus sign (-), dollar sign
($), or percent sign (%). When neither a plus sign nor minus sign is
provided, a positive number is assumed. A dollar sign indicates a
hexadecimal integer and a percent sign indicates an octal integer.
integrated circuit (IC) A silicon chip on which electrical connections are etched to form
electrical components. An IC may contain as many as 100,000 gates
depending on the technology used. Chips are mounted on boards and
connected to form processing and memory functions for a computer.
intelligent network processor (INP) A communications input/output board used with
Hewlett-Packard data communications products.
intelligent terminal A terminal that can edit, perform error checking, and respond to
programmatic instructions. An intelligent terminal may be as simple as a
CRT terminal capable of block transmissions and minor editing, or as
complex as a terminal that is fully user-programmable.
interactive An interactive session allows users to enter commands and data at the
terminal and receive an immediate response. Sessions are useful for data
entry and retrieval, text editing, or program development where direct
dialog with the computer is preferred.
interactive access capability (IA capability) A capability assigned to accounts and
users allowing users to initiate sessions with the HELLO command.
interactive mainframe facility (IMF) An MPE communications subsystem allowing
users to access a mainframe computer in interactive mode using a
Hewlett-Packard distributed system network (DSN).
interactive user A user who enters commands at a terminal.
interface 1. The connecting circuitry linking the central processor of a computer
system to its peripheral devices.