Memory protection system for a multi-tasking system
    11.
    发明授权
    Memory protection system for a multi-tasking system 失效
    多任务系统的内存保护系统

    公开(公告)号:US5995750A

    公开(公告)日:1999-11-30

    申请号:US991422

    申请日:1997-12-16

    IPC分类号: G06F9/46 G06F12/14

    CPC分类号: G06F12/1441 G06F12/1491

    摘要: A memory protection system in a multi-tasking system for preventing a currently running application from writing data to a memory segment storing data for a second application. The memory protection system transmits m upper address defining a memory segment of the currently running application to the memory from a memory register. The memory protection system detects when a currently running application generates an invalid address and disables the data operation to prevent the corruption of data in a memory segment storing data for the currently running application. The system verifies that the m upper address bits in the memory register after the application is completed are equal to m upper address bits of the memory segment of the completed application.

    摘要翻译: 一种多任务系统中的存储器保护系统,用于防止当前正在运行的应用程序向存储第二应用数据的存储器段写入数据。 存储器保护系统从存储器寄存器向存储器发送定义当前正在运行的应用的存储器段的上层地址。 存储器保护系统检测当前正在运行的应用程序何时生成无效地址,并禁用数据操作,以防止存储当前正在运行的应用程序的数据的存储器段中的数据损坏。 该系统验证在应用完成后存储器寄存器中的m个高地址位等于已完成应用的存储器段的m个高地址位。

    Framing square
    12.
    发明授权

    公开(公告)号:US12111150B1

    公开(公告)日:2024-10-08

    申请号:US17880272

    申请日:2022-08-03

    申请人: Thomas C. Green

    发明人: Thomas C. Green

    IPC分类号: G01B3/56 B25H7/04

    CPC分类号: G01B3/566 B25H7/045

    摘要: The framing square may comprise a square, a carrier, and a laser distance meter. The framing square may be a tool for measuring a right angle. The square may be a metal armature comprising two arms that form the right angle. The carrier may slide in a carrier located on a first arm. The laser distance meter may be coupled to the carrier and may optically measure a separation distance between the first arm and a first object. A second arm may be placed adjacent to a second object. Two separation distance measurements from different positions on the first arm may determine if the first object is perpendicular to the second object, even when the first arm is not in contact with the first object.