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What is JCB (job control block )

 
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sathish1760

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Joined: 02 May 2008
Posts: 42
Location: chennai

PostPosted: Thu Aug 21, 2008 8:27 pm    Post subject: What is JCB (job control block )
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Hi,
can any one tell me what is JCB (job control block )? and how we can access it by using assembler or cobol ?

sathish
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superk

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Joined: 26 Apr 2004
Posts: 4650
Location: Raleigh, NC, USA

PostPosted: Thu Aug 21, 2008 8:29 pm    Post subject: Reply to: JOB CONTROL BLOCK
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See this previous topic.
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enrico-sorichetti

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Joined: 14 Mar 2007
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Location: italy

PostPosted: Fri Aug 22, 2008 12:06 am    Post subject: Reply to: What is JCB (job control block )
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just being picky...
If You do not know what a JCB is, why do You want to access it icon_biggrin.gif

if You really want some help, explain what You are trying to achieve
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Pedro

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Joined: 01 Sep 2006
Posts: 2081
Location: Silicon Valley

PostPosted: Fri Aug 22, 2008 2:04 am    Post subject: Reply to: What is JCB (job control block )
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Novices... stop reading.

Start here: http://www-03.ibm.com/systems/z/os/zos/bkserv/r10pdf/
and select MVS, then look at the 'Data Areas' books. They have mappings of various system control blocks.

For example, vol 3 has JSCB. The book will tell you the 'macro id' name which is the member of SYS1.MACLIB. In assembler, you add a COPY statement for the member name. Also in the book, there is a 'pointed to by' field so you can get addressability to it.
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sathish1760

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PostPosted: Fri Aug 22, 2008 10:50 am    Post subject: Reply to: What is JCB (job control block )
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Thanks pedro..
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