ICL 1900 Series George 3 Operating System Commands

DISPLAY (DP)

Function

Causes a message to be sent to the monitoring file system, the current display and, in some cases, the operator's console.

Format

DISPLAY routing parameter,text

The first parameter is a number. The text may be up to 40 characters long. Excess characters will be lost.

Forbidden contexts

NO USER

Execution

The text is written to the monitoring file system (the DISPLAY category) and set up as the current display.

The routing parameter is used to control output to the operator's console and may take any value in the range 0 to 3 (inclusive) with the following meaning:

• 0 - send this text to my monitoring file
• 1 - send this text to my monitoring file and my cluster console
• 2 - send this text to my monitoring file and to the CENTRAL console
• 3 - send this text to my monitoring file, my cluster console and to the CENTRAL console

Notes

In a job initiated centrally, a routing parameter of 1 causes output to be sent to the central operator's console, since all local peripherals form an implicit central cluster.

Output to the monitoring file system has the form

    DISPLAY text

In cases in which output is ent to the operator's console it has the form

    user name,job name DISPLAY: text

Examples

DISPLAY 1,*CR0 HAS FAILED
DISPLAY 0,(SWITCHES 2,5,7 ON)

Error Messages

INVALID ROUTING PARAMETER
TRACING AND REPORTING ARE SUCH THAT YOU WILL GET NO OUTPUT FROM THIS COMMAND