U.S. Geological Survey                   Fall 1985 DECUS Symposium
Menlo Park, California                   RSX SIG Tape Submissions

We are pleased to present two modest submissions to the Fall 1985
RSX SIG Tape:

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Name:              VVC -- Volume Valid Control task
Operating System:  RSX-11M-Plus V2.1E
Author:            Gary L. Maxwell
Version:           V01
How to build:      @VVC.CMD

This task will bring a system disk "back to life" after losing
hardware or software volume valid (whatever the reason). VVC stalls
I/O to the system disk, while it waits for the disk to return to
operating condition. What was formerly a fatal condition under
M-Plus is now recoverable.

Please refer to the source file VVC.MAC for implementation details.

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Name:              VINIT.PAT -- Patch file to Fortran-77 OTS
Operating System:  RSX-11M-Plus V2.1
Compiler Version:  Fortran-77 Version 5.0
Authors:           Gary L. Maxwell and Lawrence M. Baker
Version:           F7705Z
How to build:      See VINIT.DOC

This patch fixes a bug in the Fortran-77 OTS which causes Virtual
Arrays to fail in I/D Space tasks. 

Please read the accompanying Multi-Tasker article in VINIT.DOC for
test case and build instructions.

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Please report any problems or suggestions regarding this software
to:
       Gary Maxwell
       U.S.G.S. M/S 977
       345 Middlefield Road
       Menlo Park, California  94025
       (415) 323-8111 ext. 2318

Have fun!
