Copying Data to and from Alternate Address Spaces

You can use the ARFROM and ALETFROM keywords on the COPY subcommand to copy data from alternate address/data spaces to other locations. Similarly, you can use the ARTO and ALETTO keywords to copy data to storage in alternate address/data spaces. The ARTO and ARFROM keywords allow you to specify the number of the access register to be used to reference data in an alternate address/data space. Use the ALETTO and ALETFROM keywords to specify from one to eight hexadecimal characters that indicate which address/data space is to be referenced.

The following examples show the use of the COPY subcommand to copy data to and from alternate address/data spaces.

Subcommand: Function
COPY 13R? 1000. ARTO(5) LENGTH(72): Copies 72 bytes starting at the location pointed to by register 13 to location 1000 in the address/data space indicated by access register 5.
COPY 1R? A080. ARFROM(1) ALETTO(40C3A): Copies 4 bytes of storage at the location pointed to by register 1 in the address/data space indicated by access register 1 to location A080 in the address/data space indicated by the ALET value 40C3A.