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:
May. 04, 1976
Filed:
Jan. 02, 1974
Allen C Hirtle, Needham, MA (US);
Honeywell Information Systems Inc., Waltham, MA (US);
Abstract
A host microprogrammed data processing system includes a plurality of tables to store information coded to define a plurality of a variety of different input-output system configurations of resources required to execute input-output instructions in a corresponding number of target systems being emulated by the host system. The host system further includes emulation apparatus which includes a control store which stores microprograms for directing the system in processing input-output instructions of target programs and for verifying whether each such instruction can be executed by the host system. The emulation apparatus generates coded information indicating which one of a given number of channel program routines the host system is required to use to execute the input-output instruction using the host input-output resources. Using the information of the tables, the emulation apparatus is able to execute completely certain types of target system input-output instructions used to perform control operations.