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. 01, 2003
Filed:
Jun. 16, 2000
Andrew T. Jennings, West Chester, PA (US);
G. Lawrence Krablin, Downingtown, PA (US);
Timothy Neilson Fender, Berwyn, PA (US);
William Stratton, Malvern, PA (US);
Unisys Corporation, Blue Bell, PA (US);
Abstract
An emulation system functions to translate instructions comprising a target application of a target system into corresponding instructions native to a host system and executes the instructions on the host system. During execution, the emulation system encounters target disk read/write operations. As the memory architectures of the host and target computer systems differ, the data in host memory is conformed to a target memory format when data in keyboard memory buffer is processed. Also, the host and target disk controllers cause storage of data on diskettes in differing byte orders. However, the emulation system performs disk/read write operations without byte-reversal prior to disk-write or subsequent to disk read operations. Thus, the host does not produce storage media having data conforming to that of target storage media. However, despite this drawback, the emulation system strikes a favorable balance between the need for precise replication of target application functionality on the one hand, and the importance of overall emulation system performance on the other.