Patent References 3721961 3930232 Emulation of target system interrupts through the use of counters Microprogrammable computer utilizing concurrently operating processors Plural microcode control memory Methods for partitioning mainframe instruction sets to implement microprocessor based emulation thereof Peripheral systems accommodation of guest operating systems Command language system for interactive computer Device driver and adapter binding technique Multiprocessor system including firmware InventorApplicationNo. 515772 filed on 04/23/1990US Classes:717/122, Source code version703/22, Software program (i.e., performance prediction)703/26, Of instruction703/27, Compatibility emulation717/162LinkingExaminersPrimary: Lee, Thomas C.Assistant: Treat, William M. Attorney, Agent or FirmForeign Patent References
International ClassG06F 015/38AbstractMultiple versions of a given system command are run on a single operating system by using one command processing program per command irrespective of its version. Each version of the command has a command definition which has the same format for all counterparts of the command. A command analyzer program transforms the parameters of a command character string into the correct data form for its command processing program based on the command definition for that version of the command. Multiple sets of command definitions are place in separate storage directories called libraries. The libraries are searched based on a version identifier to find the command definition for a command. The version identifier may be specified as a program attribute, entered interactively or entered by the system. Multiple programs written with different versions of commands may be run in conjunction with each other and the system will dynamically adapt to the version of each program as it is running. Also more than one command definition library may be searched to process a command. Therefore, commands written in various versions may be embedded in the same program and the system will dynamically adapt to multiple versions of commands in a program.Other References
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