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Browse Prior Art Database

PS/2 Option Card Testing

IP.com Disclosure Number: IPCOM000111464D
Original Publication Date: 1994-Feb-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 4 page(s) / 121K

Publishing Venue

IBM

Related People

Alderton, J: AUTHOR [+3]

Abstract

Disclosed is an equipment that allows Personal Computer (PC) option cards to be tested without powering down yet protecting both card under test and tester. It is lower cost and more effective than commercially available alternatives.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

PS/2 Option Card Testing

      Disclosed is an equipment that allows Personal Computer (PC)
option cards to be tested without powering down yet protecting both
card under test and tester.   It is lower cost and more effective
than commercially available alternatives.

      Known as "Locate III" (Low Cost Automatic Test Equipment), this
Plant design employs new methods and has the following features.

1.  A test card can be plugged in and unplugged without powering down
    the test system.

2.  The card current can be monitored to protect the card under test
    and equipment.

3.  Automatic control of the test fixture and power supplies is from
    the control card.

4.  Test fixture (A) attaches the card to the micro-channel by means
    of a gold zebra strip.

5.  Test fixture (B) attaches the card to the ISA Bus by means of a
    gold zebra strip without the need for interface buffers.

6.  Equipment utilization is very high due to design concept (i.e.,
    points 2 & 4).

7.  High capital savings compared to previous test method.

      The LOCATE provides interface circuitry and fixturing to test
all functions of PS/2* option cards at system speed.   With this
approach it makes use of one system to control the LOCATE and run the
test code on the Card Under Test (CUT).   Previous equipment used one
system to control the test equipment and one to run the card
diagnostics.

      Since the start of the manufacture of PS/2 option cards, the
arrangement for attaching the card to the channel for test purposes
has been of a manual spring probe-type operation which proved to be a
maintenance intensive fixture to keep in operation.   In
consideration of the above problem, an air fixture was designed which
uses a zebra strip to make connection to the Micro Channel* and
provide a connector for the CUT.   To assist in maintenance and wear
of the test connector, sockets and shroud have been attached to the
interface printed circuit board (Fig. 1).  The operation of the
fixture (Fig. 4) makes use of the fact that at initial power-on all
PS/2 option cards are in a disabled state before the card is
configured within the system.  Thus, the first operation of the
LOCATE fixture is to power-on the card and issue a CHRESET via the
control card which degates all outputs (interrupts, CD SFDBK, etc.).
With the...