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Interactive Simulator File and Data Structure Format

IP.com Disclosure Number: IPCOM000064568D
Original Publication Date: 1985-Aug-01
Included in the Prior Art Database: 2005-Feb-19

Publishing Venue

IBM

Related People

Authors:
Bull, M [+details]

Abstract

A technique is described for recording sequentially occurring events associated with a set of items (nets) when the data for the different items is intermixed in a random fashion. The data structure provides the capability to directly access the data for an item, or a group of items, without having to scan large volumes of data. This achieves a large processing performance improvement over conventional sequential techniques. This technique is advantageously employed in logic simulation where the results of simulating the activity between two or more interconnected circuits in a circuit net are written to an "all events trace file" (AET) in sequential order and the post-processing function requires the data in a different order. A key-sequenced Virtual Storage Access Method (VSAM) dataset is used to contain the data.