NonStop System Glossary

cached bindings
A copy in virtual memory of the data pages containing symbolic references that were rebound
when a loadfile was loaded. The cached bindings are associated with a library import
characterization that characterizes the set of loadfiles to which the symbols were bound. If the
same file is subsequently loaded in an equivalent environment in the same processor, the cached
bindings can be reused. See fastLoad.
CAE
See common applications environment (CAE).
canonical form
A standard way of representing TNS machine register values in assigned system registers, at certain
synchronization points within accelerated code. Each live 16-bit TNS register value resides in its
home system register, right-justified and sign-extended to fill the 32-bit or 64-bit register. Register
values that have no future uses are considered dead; their home system registers might contain
undefined values.
The TNS machine state must be in canonical form at all register-exact points where the program
might switch to or from interpreted execution mode. At all other program locations, Accelerator
or TNS Object Code Accelerator (OCA) optimizations might cause TNS register values to be
carried in various noncanonical forms such as combined TNS register pairs.
canonical input mode
For an Open System Services (OSS) process, a terminal input mode in which data is not made
available to the process until an entire logical line (delimited by a newline, EOF, or EOL character)
is entered. This mode is sometimes called line mode or nontransparent mode. Contrast with
noncanonical input mode.
CAP
See cartridge access port (CAP).
Carbon Copy
A remote operations software application that enables a workstation in one location to access,
through a modem, a workstation in another location. Carbon Copy is included with all system
consoles, and service providers use it to dial in to system consoles at customer sites. See also
remote access.
card cage
A structure made up of slots that hold components such as disk drives and ServerNet adapters.
carrier
An electrical signal that carries data.
cartridge access port (CAP)
The component on a tape library where you insert cartridges into and remove cartridges from the
library.
caught signal
A programmatic signal that is delivered to a process that has a signal-handling function for it.
When the signal is caught, the process is interrupted, and the signal-handling function executes.
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