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Row Table Addressing Method for Smooth Scroll

IP.com Disclosure Number: IPCOM000034293D
Original Publication Date: 1989-Jan-01
Included in the Prior Art Database: 2005-Jan-27

Publishing Venue

IBM

Related People

Authors:
Iida, H Matsumoto, Y Sohda, M [+details]

Abstract

This article describes a method for an easy smooth scroll (S/S) control which uses a row table control method for the character display. In the case of a normal row table control method there is only one row table for the display but, in this method, there is an additional row table (sub-row table) for the S/S which is controlled by hardware in order to improve the performance from a programming point of view. (Image Omitted) Figs. 1, 2 and 3 show the S/S performance of this method. There are two row tables: one is a main row table used for the normal display screen, and the other is a sub-row table which has only one element and is used for a row disappearing from the screen during S/S. Fig. 1 shows the condition of two row tables during normal display and just before S/S.