ICL 1900 Series George 3 Operating System Commands

PRINT (PT)

Function

Writes one or more regions of the current core image to the monitoring file system.

Format

PRINT region₁,region₂, ...region_n

Each region parameter can be written in one of three ways:

1. As two seperate parameters (n,m), where n and m are numbers specifying the first and last locations of a region
2. As one parameter, n(m), where n is as above and m is a number givingthe total number of words in the region
3. As one parameter n, where n is a number specifying a location to be printed

Forbidden contexts

NO CORE IMAGE

Execution

Printing is in the standard format, i.e.

    A C D O I

where

• A is the address of the location in decimal
• C is the contents in character form
• D is the contents as a signed decimal number
• O is the contents in octal
• I is the contents in instruction format (FXM/N)

The core image is preserved after the command has been obeyed.

If a series of zeroised locations are encountered by PRINT, only the first and last locations of the series will be written.

Examples

PRINT (20,22)
PRINT 20(3)
PRINT 20,21,22
PRINT FRED,ALL

Error Messages

z CONTAINS AN UNPAIRED DELIMITER
NUMBER OF PRINTWORDS MUST BE POSITIVE
PARAMETER CONTAINS AN INVALID NUMBER FORMAT
TRACING AND REPORTING ARE SUCH THAT YOU WILL GET NO OUTPUT FROM THIS COMMAND