公开(公告)号：DE3373233D1

公开(公告)日：1987-10-01

申请号：DE3373233

申请日：1983-09-28

Applicant: IBM

Inventor： CANTON DAVID ALFRED ,  HOLLOWAY BRIAN LEONARD ,  SARGEANT NICHOLAS BRIAN ,  LLEWELYN ROGER JAMES

IPC: G09G5/32 ,  G09G1/00 ,  G09G5/24 ,  G09G5/34 ,  G09G5/397 ,  G09G5/399 ,  G09G1/16

Abstract: A data display apparatus employs a raster scan cathode ray tube (1), a character refresh buffer (2) and three character row buffers (5,6,15) to address a character generator (3) in conjunction with a slice counter (4) or offset slice counter (18) under control of an events control module (20). This enables data within a partition on the CRT to be scrolled smoothly (scan-line-by-scan-line) and characters of different height (requiring different numbers of scans) to be displayed on the same row of the CRT.