what above line n below line in jcl

chaudhary1984 · New User Joined: 03 Oct 2006 Posts: 5

what above line n below line in jcl plz help me in these question i m confusing when v use it ?

guptae · Posted: Thu Oct 12, 2006 4:54 pm

Hi there,

Before IBM introduced MVS/XA architecture in the 1980's a program's virtual storage was limited to 16 megs. Programs compiled with a 24 bit mode can only address 16 Mb of space, as though they were kept under an imaginary storage line. With COBOL II a program compiled with a 31 bit mode can be 'above the 16 Mb line. (This 'below the line', 'above the line' imagery confuses most mainframe programmers, who tend to be a literal minded group.)

Please correct me if i wrong