Author: Robert W. Phelps

University of Rochester Medical Center, Rochester, N.Y.

Operating System: OS/8

Source Language: RALF

Memory used: 1200₈ words

Abstract: Called from FORTRAN by the statement:

CALL USR (UNIT, NAME, FUNCI, ERROR)

Allows execution-time opening and closing of standard OS/8 files from

FORTRAN IV. The calling sequence specifies the logical unit number,

device-filename, and whether the file is to be read, written or closed. File

or device errors are returned by a fourth parameter.

Up to five files may be independently opened, read/written, or closed.

Large programs may use buffer space of unused logical unit numbers--

USR only allows files to be opened for logical unit numbers for which

there is enough core available.

A patch to FRTS is necessary (and described in the write-up) for USR

to work properly.

Note: (from the DECUS Librarian: The Library has received

numerous favorable comments on this package; however, compatibil-

ity with the current release of OS/8 is uncertain.)

Media Price Code: A2, H32, K54

Format: OS/8

Catalog: August 1978