Browse Prior Art Database

Pixel-Map Graphics Address Transformation and Validation Mechanism for Areal, Segmented and Virtual Memory Address Spaces

IP.com Disclosure Number: IPCOM000057443D
Original Publication Date: 1988-May-01
Included in the Prior Art Database: 2005-Feb-15

Publishing Venue

IBM

Related People

Authors:
Dilliplane, SC [+details]

Abstract

A technique is described whereby a pixel-map address transformation and validation mechanism provides multiple protected, isolated, segmented, virtual areal address spaces supporting pixel-maps of format-independent pixel-data types. The concept eliminates address model limitations involving pixel-map graphics in virtual memory environments. Specifically addressed are the limitations in pixel-map format and nested pixel-map aliasing. Typically, a computer memory address model provides for a one- dimensional array of addressable units in a linear address space. Each entity within the linear address space spans one or more addressable units. Each pattern of spans is known as a data type, and a specific instance of a data type is called a data element.