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:
Feb. 12, 1991
Filed:
Feb. 22, 1989
Gerhard Bachinger, Sauerlach, DE;
Thomas Barkmeyer, Munich, DE;
Ehrard Kroesa, Groebenzell, DE;
Wolfgang Siegmund, Munich, DE;
Bernhard Werres, Graefelfing, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
A modularly structured ISDN communication system has a system processor that is administered by a multi-tasking real-time operating system. Since this operating system can only assign system-internal function programs to the system processor (on-line system), a software application module having a time-sharing operating system is provided, so that the same processor can be administered by both operating systems. In order to effect this, one task of the real-time operating system is fashioned as a sluice sub-system SUB in which an allocation switch from the addressing tables of the real-time operating system onto those of the time-sharing operating system occurs. An interrupt transition routine that leads back into the sluice sub-system SUB in which the allocation switch is in turn cancelled is present in the time-sharing operating system for a processing of interrupt requests. Messages can be forwarded from one operating system to the other by use of an intercommunication data segment, so that data from the administration of the one operating system can be transferred into that of the other operating system in a simple manner.