Browse Prior Art Database

Technique for Storing Variable Length Data in a Circulating Buffer

IP.com Disclosure Number: IPCOM000046142D
Original Publication Date: 1983-Jun-01
Included in the Prior Art Database: 2005-Feb-07

Publishing Venue

IBM

Related People

Authors:
Eveland, RE Luo, CY Vakharia, DJ [+details]

Abstract

The present invention relates to utilization of a variable-length circular buffer to eliminate the need to break down long variable-length information into a plurality of small segments in order to store the data in the more traditional fixed-length buffer. In communicating text processing equipment using SNA (System Network Architecture) protocol, a Path Information Unit (PIU) trace facility is used by Customer Engineers in lieu of external line trace equipment to diagnose communication protocol and/or data compatibility related problems. In the conventional communications trace facility, every PIU received or transmitted is stored in a fixed-length circular PIU trace buffer. However, each PIU may be a variable length and therefore requires that header information be stored with the data to denote its length.