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:
Jul. 20, 2004
Filed:
Jun. 08, 2000
Michael J. Rieschl, St. Paul, MN (US);
Kurt N. Johnson, Edina, MN (US);
Dave Q. Anderson, Coon Rapids, MN (US);
Unisys Corporation, Blue Bell, PA (US);
Abstract
Emulation of a hardware peripheral is accomplished through use of object oriented software and runs in an object oriented environment. Particular adaptation of an emulation to enable specific data storage magnetic tape drive peripheral is described. Use of emulators in general enables continued reliance on legacy hardware and software without maintaining an entire suite of legacy hardware. Simplified emulation structure enabled by object oriented programming described herein makes migration from legacy systems feasible in stages at relatively low cost. In set-up and in use, users can have control over instances of emulator objects, including association with data files that operate as virtual storage media whether initially associated with the emulator or not, using a simple window-based interface for choosing particular data files, opening them, opening new instances of emulator objects and so forth. Variations are also described. Legacy programming is handled by use of legacy instructions communicated to the emulated object instances, which the object instances respond to appropriately.