The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 25, 1995
Filed:
Nov. 12, 1992
Paul G Lubold, Kingston, NY (US);
Ronald S Manka, Woodstock, NY (US);
Robert A Niemitalo, Cary, NC (US);
Karen S Porter, Saugerties, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Higher functions terminals and lower function terminals, as well as dual mode terminals that are selectively operated at either functional level, are simultaneously supported on a common control unit interface in an information handling system. Communications with single mode terminals are directed to a buffer portion having a predetermined base address. Each dual mode terminal contains a buffer that is partitioned into respective portions used for communications at different function levels. Communications at a lower functional level are conducted through the buffer portion containing the base address while communications at a higher functional level are redirected to a buffer portion containing shifted addresses. The control unit includes means for determining the suitable level of terminal function and adjusting the addressing of the terminal buffer accordingly.