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From: John Levine <johnl@taugh.com>
Newsgroups: comp.arch
Subject: Re: ancient OS history, ARM is sort of channeling the IBM 360
Date: Tue, 2 Jul 2024 01:02:07 -0000 (UTC)
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According to Lawrence D'Oliveiro  <ldo@nz.invalid>:
>> Again, it depends.  For COBOL, you didn't have to specify anything. The
>> compiler set up everything for you for you, and it "just worked".
>
>Maybe it didn’t. Given the way locate-mode I/O is set up, it should 
>automatically fall back to copy-mode if the conditions are not right. So 
>maybe you were in fact using copy-mode, not locate-mode, most of the time, 
>without realizing it.

You know, you could admit that just once you're wrong.

Or you could read the COBOL manuals, e.g. page 91 of the DOS COBOL
Programmer's guide:

 Files can be processed using multiple buffers. Logical records are
 referenced in the proper biock by adjusting registers (using them as
 pointers). 

 This technique eliminates the need for moving a record from the
 buffer area to a separate record work area, as well as the record work
 area itself. The record can be operated on directly in the buffer
 area. 

-- 
Regards,
John Levine, johnl@taugh.com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly