公开(公告)号：EP0543271A2

公开(公告)日：1993-05-26

申请号：EP92119286.0

申请日：1992-11-11

Applicant: NELLCOR INCORPORATED

Inventor： Godfrey, Tim G.

IPC: G09G5/34

CPC classification number: G09G5/346

Abstract: A graphics coprocessor adapter with hardware support for horizontal scrolling is disclosed. A graphics processor provides both a row address with a RAS signal and a column address with a CAS signal to two banks of video RAMs. Both banks are provided with the same scrolling column address signal. Translating logic intercepts the column address signal for the static plane RAM bank and translates it into a fixed value. Thus, a single column address signal can control both the scrolling and static planes.

Abstract translation: 公开了一种具有用于水平滚动的硬件支持的图形协处理器适配器。 图形处理器将具有RAS信号的行地址和具有CAS信号的列地址同时提供给两组视频RAM。 两个存储体都具有相同的滚动列地址信号。 翻译逻辑截取静态平面RAM库的列地址信号，并将其转换为固定值。 因此，单列地址信号可以控制滚动和静态平面。

公开(公告)号：EP0543271A3

公开(公告)日：1995-04-05

申请号：EP92119286.0

申请日：1992-11-11

Applicant: NELLCOR INCORPORATED

Inventor： Godfrey, Tim G.

IPC: G09G5/34

CPC classification number: G09G5/346

Abstract: A graphics coprocessor adapter with hardware support for horizontal scrolling is disclosed. A graphics processor provides both a row address with a RAS signal and a column address with a CAS signal to two banks of video RAMs. Both banks are provided with the same scrolling column address signal. Translating logic intercepts the column address signal for the static plane RAM bank and translates it into a fixed value. Thus, a single column address signal can control both the scrolling and static planes.