Dear Steve 

As I understand from your explanations, compiling COBOL in 64 bit mode is not 
useful.
But the question is that this much of addressable of memory (64 Bit ) is for 
what ?Because as I know most the applications in mainframe are developed by 
COBOL and C.(Mostly COBOL)Best regardsManshadi       

     On Thursday, January 15, 2015 11:37 PM, Steve Thompson <[email protected]> 
wrote:
   

 On 01/14/2015 07:51 PM, Tom Ross wrote:
<SNIPPAGE>
> I (like the other poster) would like to know what you would do with AMODE 64 
> COBOL?
> Also, does everyone realize that AMODE 64 code will run slower than AMODE 31 
> code?
<SNIPPAGE>

Well, if one is interfacing with another IBM product that has its 
data above the BAR, then I could see COBOL needing to be able to 
get to that storage.

CICS and Java apps come to mind.

As for running slower, isn't that a function of the multi-level 
DAT for support of chained segment tables to handle 64bit addressing?

IF 64bit is that much slower, that you would have to give a 
warning, shouldn't that warning have been given to the C/C++ and 
Java crowd? OK, the C/C++ crowd? And the HLASM and PLX (or PL/AS, 
or whatever name it has now) programmers?

It seems that being slower did not / does not seem to slow down 
CICS/TS 5.x or DB2. Just say'n.

Regards,
Steve Thompson

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