Assembly language won’t make much sense until you get a grip on the USING directive and the associated terms: Domain and Range. You can hear a lesson about this here. When things go wrong with USING directives, the result is an addressability error – usually lots of them! This video lesson, recorded in a real mainframe session, can make Addressability errors a snap.
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David for some reason the video is not loading . I want to clear my concepts of Using in Assembler .
I’ll check it out immediately.
Some of the links in the posts are old, now. Most of the material on my academic site has been moved to this site. You can find the USING video under the link to The Video Course on the main page. You can also see a link there for Named USINGs which you should check out.