Abstract: An emulation system, computer program product, and method for emulating the execution of a target program comprising instructions of an instruction set of a target computer on a host computer having a different instruction set operate by performing a static translation of the instructions of the target program into a series of instructions of an intermediate instruction set, the intermediate instruction set being optimized for interpretation on the host computer, and then executing the series of instructions of the intermediate instruction set by interpretation on the host computer.

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.

Abstract: A first dynamic link library (DLL) of a first computing environment, which exports one or more procedures that an application program executing in the first computing environment can call, is replaced with a second DLL that executes in a second computing environment, in a manner that is transparent to the calling application. A source code skeleton of the second DLL is automatically generated based on information contained in a directory of the compiled object code of the first DLL. The exported procedures of the second DLL have interfaces that are identical (from the perspective of the calling application) to the interfaces of the corresponding exported procedures of the first DLL, but the exported procedures of the second DLL comprise native code of the second computing environment.