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what above line n below line in jcl

 
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chaudhary1984

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Joined: 03 Oct 2006
Posts: 5

PostPosted: Thu Oct 12, 2006 4:18 pm    Post subject: what above line n below line in jcl
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what above line n below line in jcl plz help me in these question i m confusing when v use it ?
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guptae

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Joined: 14 Oct 2005
Posts: 1187
Location: Bangalore,India

PostPosted: Thu Oct 12, 2006 4:54 pm    Post subject:
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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
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