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Browse Prior Art Database

OVERCOMING HP 3065 MOUNTED VOLUME CAPACITY LIMITATIONS

IP.com Disclosure Number: IPCOM000006047D
Original Publication Date: 1991-Apr-01
Included in the Prior Art Database: 2001-Nov-28
Document File: 2 page(s) / 94K

Publishing Venue

Motorola

Related People

Edward J. Smeltz: AUTHOR

Abstract

The Hewlett-Packard 3065 Board Test System limits to two hundred the number of volumes1 it can have mounted' at one time. With an alternate approach to volume mounting, the board test engineer can overcome this limit to enable the system to handle many more than two hundred volumes.

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MOTOROLA INC. Technical Developments Volume 12 April 1991

OVERCOMING HP 3065 MOUNTED VOLUME CAPACITY LIMITATIONS

by Edward J. Smeltz

   The Hewlett-Packard 3065 Board Test System limits to two hundred the number of volumes1 it can have mounted' at one time. With an alternate approach to volume mounting, the board test engineer can overcome this limit to enable the system to handle many more than two hundred volumes.

  In the standard configuration, the HP 3065 uses what is known as an "autofile". The autofile is a text file which contains the path name of the board test program to be run. When the testhead START button is pressed, the system finds the autofile which corresponds to the fixture identification strapping and uses it to load and run the appropriate board test program. This method of starting programs assumes the board volume is already mounted by the system.

  The above method works if and only if the total number of mounted volumes on the system is less than hvo hundred. A problem results if mcne test capacity is required. In the past, a common solution has been to invest over $150,000 in an additional board test controller. Another solution has been to manually mount and unmount volumes as necessary. Besides consuming a considerable amount of the board test engineer's time, it is prone to considerable error and inconvenience. Neither of these solutions makes good use of available resources.

  A better way to overcome the mount capacity problem is to keep the board volumes unmounted until just before they are required for use by the system. At that time, the system automatically mounts the volume it needs. In this way, production does not require the board test engineer's help to mount the volumes they need. Simply pressing the START button is sufficient to mount the board test volume and run the necessary program. How to accomplish this is the challenge.

  The first part of this technique is to make the autofile call up a BTBASIC program other than the board test program. This other program mounts the

volume and then loads and runs the board test program. The first task for this intermediate program is trivial, but the second is not. After mounting the board volume, the intermediate program must cha...