Patent ID: 7809547
Filing Date: 2010-10-05
Classification: G06F

Abstract:
1. Apparatus for emulating hardware and operations of a first, target, computer system having legacy system and legacy application program software source code compiled to produce executable legacy binary code which includes legacy code instructions in a word size of a first length, the apparatus comprising: A) a host computer system having a word size of a second length which is larger than the word size of the first length, said host computer system including: B) a compiler receiving the legacy application program software source code and generating an enhanced executable program file which is stored on the peripheral equipment for loading into the memory of the host computer system, the enhanced executable program file including instructions having the word size of the second length and optionally including instructions having the word size of the first length; and C) a switch mechanism, included within the special purpose software emulator, selectively based upon the word length directing processing of instructions at run time from the enhanced executable program file loaded in memory to either: