公开(公告)号：DE3067373D1

公开(公告)日：1984-05-10

申请号：DE3067373

申请日：1980-10-24

Applicant: IBM

Inventor： BEETESON JOHN STUART ,  HOLLOWAY BRIAN LEONARD ,  JARZEBOWSKI KRZYSTOF TADEUSZ

IPC: G09G1/00 ,  G09G1/28 ,  H01J29/70 ,  H04N9/28

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.

公开(公告)号：DE3370090D1

公开(公告)日：1987-04-09

申请号：DE3370090

申请日：1983-06-30

Applicant: IBM

Inventor： HOLLOWAY BRIAN LEONARD ,  LLEWELYN ROGER JAMES

IPC: G09G5/08 ,  G09G1/16 ,  G09G5/18 ,  G09G5/22 ,  G09G5/34

Abstract: A programmable timing circuit for a cathode ray tube includes a register stack (48) in which events to be timed are stored so that they are presented to comparators (45, 46 or 47) in the sequence in which they will occur. Each event is coded in terms of the position (character, line or row) on the screen at which it is to occur and flags stored with the values are decoded to identify the event being timed when a match is found between the presented value and the count in a character, line or row counter (40, 41 or 42) which is indicative of the current beam position on the screen. Values in the register stack can also control internal operations of the timing circuit, for example re-setting counters or re-addressing the stack.