Browse Prior Art Database

Using a Personal Computer As a Datascope Without a Special Card

IP.com Disclosure Number: IPCOM000100463D
Original Publication Date: 1990-Apr-01
Included in the Prior Art Database: 2005-Mar-15
Document File: 3 page(s) / 89K

Publishing Venue

IBM

Related People

Mueck, RM: AUTHOR

Abstract

Disclosed is a method for using a personal computer as an RS232C dataline monitor without the need for any specialized card. Two asynchronous ports and a specialized cable are required. The cable, described in Fig. 1, makes it possible to use ordinary asynchronous ports as opposed to a special datascope card.

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This is the abbreviated version, containing approximately 52% of the total text.

Using a Personal Computer As a Datascope Without a Special Card

       Disclosed is a method for using a personal computer as an
RS232C dataline monitor without the need for any specialized card.
Two asynchronous ports and a specialized cable are required.  The
cable, described in Fig. 1, makes it possible to use ordinary
asynchronous ports as opposed to a special datascope card.

      The inherent advantages of using a PC as a datascope are:
 1.   The cost of a PC is usually less than the cost of a datascope.
 2.   The PC can be used for this function when needed and for normal
use  otherwise.  A conventional datascope can only be used as a
datascope.
3.   It is much more likely that a PC will be available when the
demand for a datascope arises.  This is because of the ratio of PCs
to datascopes in the development environment.
4.   The PC datascope, unlike a conventional datascope, can collect
data on a PC file which can then be formatted using a PC program or
uploaded to a host for processing.  This processing can include
formatting the data to display a particular protocol.
5.   The PC offers more processing power than a datascope. This can
be used to provide functions, such as data formatting, paging through
data, searching for certain character sequences and selective
collection of data.

      This datascope uses two asynchronous ports but is connected in
parallel, not serially to the monitored line. This is very important
because it results in a passive monitor device which does not affect
the speed or any other characteristic of the monitored line.

      This also enables it to handle high-speed data transmission
since the monitor does not have to repeat the characters.

      The reason two ports are used is so that one port can monitor
received characters and the other port can monitor transmitted
characters.

      The elements required to implement this function are:
1.   Any...