Re: ancient OS history, ARM is sort of channeling the IBM 360

On Sun, 30 Jun 2024 04:33:11 -0000 (UTC), Stephen Fuld wrote:

Lawrence D'Oliveiro wrote:
 

On Sat, 29 Jun 2024 18:22:04 -0000 (UTC), John Levine wrote:
 

... more often than not locate I/O is faster and easier.

 
Given all the caveats and restrictions, “easier” is not how I would
describe it.

 
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.