What does UNIT stand for? | Setup, I/O, and Basic questions | CHARMM forums

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#472 - 10/30/03 05:04 AM What does UNIT stand for?
tjaart Forum Member Registered: 10/16/03 Posts: 40 Loc: Pretoria, South Africa	Hi all In all the scripts you open a UNIT with a number afterwards. What does this UNIT stand for? What does it do? Is certain numbers reserved and what do the numebrs stand for? Thanks!!!!! _________________________ Tjaart de Beer
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#473 - 10/30/03 11:02 AM Re: What does UNIT stand for? [Re: tjaart]
cao Forum Member Registered: 10/17/03 Posts: 23	The document, io.doc will be helpful!
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#474 - 10/31/03 01:29 AM Re: What does UNIT stand for? [Re: cao]
tjaart Forum Member Registered: 10/16/03 Posts: 40 Loc: Pretoria, South Africa	I don't seem to find anything on UNIT in either io.doc or usage.doc? Any other files where I may look? _________________________ Tjaart de Beer
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#475 - 10/31/03 11:46 AM Re: What does UNIT stand for? [Re: tjaart]
cao Forum Member Registered: 10/17/03 Posts: 23	Sorry for incorrect information. From usage.doc Fortran I/O Units Usage by CHARMM In order to keep CHARMM as machine independent as possible, all specification of files is done through Fortran unit numbers. Two unit numbers have special signifigance, 5 and 6. Unit 5 is the command file interpreted by CHARMM. Unit 6 is the output file for all printed messages. As commands are read from unit 5, they are echoed on unit 6. All other unit numbers have no predefined meaning. The CHARMM OPEN command may be used to assign files to units. It just follows fortran's I/O rules.
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