公开(公告)号：US5841446A

公开(公告)日：1998-11-24

申请号：US742881

申请日：1996-11-01

Applicant: Dayang Dai

Inventor： Dayang Dai

IPC: G09G5/39 ,  G09G5/00

CPC classification number: G09G5/39 ,  G09G2360/122

Abstract: The present invention is a graphics subsystem with a plurality of storage elements addressed by multiple bit physical addresses and a video display with a plurality of pixels addressed by multiple bit logical addresses. The graphics subsystem includes an address conversion circuitry for converting the logical addresses of the pixels to physical addresses in the video memory. When the number of bytes needed to address the plurality of pixels across the screen is not equal to an integral power of two and the logical addresses of the plurality of pixels are arranged in tiles, the address conversion circuitry converts the logical addresses of the pixels to physical addresses in the video memory by converting only portions of the total address space into tiles at any one time.

Abstract translation: 本发明是具有由多个位物理地址寻址的多个存储元件和具有由多位逻辑地址寻址的多个像素的视频显示的图形子系统。 图形子系统包括用于将像素的逻辑地址转换为视频存储器中的物理地址的地址转换电路。 当在屏幕上寻址多个像素所需的字节数不等于2的整数倍并且多个像素的逻辑地址被排列成瓦片时，地址转换电路将像素的逻辑地址转换为 物理地址通过仅将地址空间的一部分转换成瓦片在任何一个时间。

公开(公告)号：US5898861A

公开(公告)日：1999-04-27

申请号：US733521

申请日：1996-10-18

Applicant: Theodore F. Emerson ,  Jeoff M. Krontz ,  Dayang Dai

Inventor： Theodore F. Emerson ,  Jeoff M. Krontz ,  Dayang Dai

IPC: G06F13/14 ,  G06F3/00 ,  G06F3/02 ,  G06F3/023 ,  G06F3/038

CPC classification number: G06F3/038 ,  G06F3/023

Abstract: A computer system that provides for transparent plugging and unplugging of a keyboard independent of system operation. A virtual keyboard device communicates with the system keyboard controller when no keyboard is plugged. The virtual keyboard device provides appropriate responses to inquiries from the operating system during startup, allowing the system to boot without an actual keyboard being present. When a keyboard is plugged, its presence is detected and it is configured by a virtual keyboard controller. The newly configured keyboard is then coupled to the system keyboard controller. On unplug, the lack of a keyboard is detected by monitoring the power supply to the keyboard, whereupon the virtual keyboard is again coupled to the system keyboard controller.

Abstract translation: 提供独立于系统操作的透明插拔和键盘拔出的计算机系统。 当没有键盘插入时，虚拟键盘设备与系统键盘控制器进行通信。 虚拟键盘设备在启动期间为操作系统的查询提供适当的响应，允许系统在没有实际键盘存在的情况下启动。 当键盘插入时，检测到它的存在，并且由虚拟键盘控制器配置。 新配置的键盘然后耦合到系统键盘控制器。 在拔下插头时，通过监视键盘的电源来检测到键盘的缺失，因此虚拟键盘再次耦合到系统键盘控制器。