In Process
When the system is processing input, generally the display screen is blank and the
IN PROCESS light is on. After the input is processed, the light goes off, the out-
put and flashing cursor are displayed, and the system waits for input.
Notes:
1. For some expressions or user-defined functions (see Chapter 51, output is
generated before the expression or function has completed execution. In such
cases, even though the system is still processing data, the IN PROCESS light
goes off and the output is displayed. The flashing cursor is again displayed
wheD the system has finished processing the input (the expression or function
has completed execution).
brightness control before calling your service representative.
2. If the display screen is blank and the IN PROCESS light is off, check the
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I I

Chapter 2. System Commands
SYSTEM OVERVIEW
(I, i
The 5100 contains an active workspace, which is the part of internal storage where
the user’s data and user-defined functions (programs) are stored. When the power
is turned off or the RESTART switch is pressed on the 5100, all the data in the
active workspace is lost. However, the contents of the active workspace can be
saved on tape (stored workspace) and then read back into the active workspace
for use at a later time (see System Command Descriptions in this chapter). The
contents of the active workspace then exist in both the active workspace and on
tape.
The tape is your library; that is, it is a place where you can store data for later
use. Before a tape can be used, it must be formatted. A formatted tape contains
one or more files where data can be stored. Each file has a file header, which con-
tains information about the file. See the )LIB system command in this chapter
for a description of the file header.
The system commands, which are used to control and provide information about
the system, are discussed next.
SYSTEM COMMAND DESCRIPTIONS
The following list shows how system commands are used to control and provide
information about the various parts of the system. Each system command is
described in detail later in this chapter.
Commands that Control the Active Workspace
Corn mand Meaning
)CLEAR Clear the active workspace.
)COPY Copy stored objects (see note 1) into the active workspace.
)ERASE Erase global objects (see note 1) from the active workspace.
)LOAD Replace the active workspace with a stored workspace.
) PCOPY Copy stored objects (see note 1) into the active workspace and pro-
tect objects in the active workspace from being destroyed.
)SYMBOLS Change the number of symbols allowed in the active workspace.
)WSID Change the active workspace ID.
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