公开(公告)号：DE3885926T2

公开(公告)日：1994-05-19

申请号：DE3885926

申请日：1988-03-17

Applicant: IBM

Inventor： HARRISON ROY BERNARD ,  BUTLER NICHOLAS DAVID ,  BOWATER RONALD JOHN ,  NORRIS PAUL WILLIAM

IPC: G06T1/60 ,  G09G5/393 ,  G09G1/16 ,  G09G5/38

公开(公告)号：DE3876887T2

公开(公告)日：1993-07-08

申请号：DE3876887

申请日：1988-06-28

Applicant: IBM

Inventor： BUTLER NICHOLAS DAVID ,  GAY ADRIAN CHARLES ,  BRESENHAM JACK E

IPC: G06F3/153 ,  G06T11/20 ,  G09G1/10 ,  G09G5/20 ,  G09G5/36 ,  G06K15/22 ,  G09G1/14

公开(公告)号：GB2228597A

公开(公告)日：1990-08-29

申请号：GB8904413

申请日：1989-02-27

Applicant: IBM

Inventor： BUTTIMER MALCOLM DOUGLAS ,  GAY ADRIAN CHARLES ,  BUTLER NICHOLAS DAVID ,  BATES MATTHEW DAMIEN ,  KIM JONG HAN

IPC: G06T11/20 ,  G06F9/302 ,  G06F9/318 ,  G09G5/20

Abstract: A data processor 18 comprises storage (eg registers R1, R2, R3) for each of first, second and third values, a processor condition register 34 for processor condition codes and logic 26 for decoding instructions including a specific instruction defining an operation between the first value and either the second value or the third value, the selection of the second or the third value being made by the processor in dependence on the state of said processor condition code. The invention is of particular, but not exclusive application for the plotting of lines in a display system 10. In an example of a display system 10 incorporating such a data processor, a pixel can be plotted on each processor instruction cycle.

公开(公告)号：GB2207839A

公开(公告)日：1989-02-08

申请号：GB8718074

申请日：1987-07-30

Applicant: IBM

Inventor： BUTLER NICHOLAS DAVID ,  GAY ADRIAN CHARLES ,  BRESENHAM JACK E

IPC: G06F3/153 ,  G06T11/20 ,  G09G1/10 ,  G09G5/20 ,  G09G5/36 ,  G09G1/16