USING instruction

The USING instruction specifies a base address and range and assigns one or more base registers. If you also load the base register with the base address, you have established addressability in a control section. If a control section has not been established, USING initiates an unnamed (private) control section.

To use the USING instruction correctly, you should know:

Which locations in a control section are made addressable by the USING instruction
Where in a source module you can use implicit addresses in instruction operands to refer to these addressable locations