Redundant memory for point of sale system
    1.
    发明授权
    Redundant memory for point of sale system 失效
    销售系统冗余内存

    公开(公告)号:US4169288A

    公开(公告)日:1979-09-25

    申请号:US791139

    申请日:1977-04-26

    摘要: A point of sale system having an active and a spare data processing system, each including separate read/write memories, with only one of the systems being active at a given time, but with the active system being able to selectively acquire data from the read/write memory of the spare system upon start-up and including means for verifying which read/write memory of the active or the spare system contains valid, most current data which is then transferred to whichever system is the active system, the read/write memories of each of the two systems having a built-in generation number counter which is incremented by one whenever either the data of the inactive read/write memory is caused to be transferred to the active read/write memory or whenever the counts in the generation number counters of both read/write memories are equal, this change in the generation number counters taking place only at the start-up of the system.

    摘要翻译: 销售系统具有活动和备用数据处理系统,每个系统包括单独的读/写存储器,在给定时间只有一个系统处于活动状态,但是主动系统能够从读取中选择性地获取数据 /在启动时写入备用系统的存储器,并且包括用于验证活动或备用系统的哪个读/写存储器包含有效的最新数据,然后将其传送到活动系统的哪个系统,读/写 每个系统的每个的存储器具有内置的生成数计数器,每当无效读/写存储器的数据被传送到活动读/写存储器时,或者每当产生的计数 两个读/写存储器的数字计数器相等,所以在系统启动时仅发生代数计数器的变化。

    Computer address modification system using writable mapping and page
stores
    5.
    发明授权
    Computer address modification system using writable mapping and page stores 失效
    使用可写映射和页面存储的计算机地址修改系统

    公开(公告)号:US5101339A

    公开(公告)日:1992-03-31

    申请号:US300560

    申请日:1989-01-23

    IPC分类号: G06F12/06 G06F12/10

    CPC分类号: G06F12/0623 G06F12/1081

    摘要: A computer system includes a computer address modification system that is advantageously coupled in a bus network to selectively translate memory address data in 16K blocks and provide DMA addresses which may match the 16 K memory address blocks. The modification system includes a mapping RAM selectively providing translated addresses to enable addresses in a 16 megabyte extended address space. The modification system also includes a page register storing for each addressable 16K block of data for each DMA channel a page address within the extended address space.

    摘要翻译: 计算机系统包括计算机地址修改系统,其有利地耦合在总线网络中以选择性地转换16K个块中的存储器地址数据,并提供可匹配16K个存储器地址块的DMA地址。 修改系统包括映射RAM,其选择性地提供翻译的地址以使得能够在16兆字节扩展地址空间中的地址。 该修改系统还包括一页面寄存器,用于存储针对每个DMA通道的每个可寻址的16K数据块,扩展地址空间内的页地址。

    Computer address modification system with optional DMA paging
    6.
    发明授权
    Computer address modification system with optional DMA paging 失效
    具有可选DMA寻呼功能的计算机地址修改系统

    公开(公告)号:US4849875A

    公开(公告)日:1989-07-18

    申请号:US84318

    申请日:1987-08-10

    摘要: A computer system includes a computer address modification system that is advantageously coupled in a bus network to selectively translate memory address data in 16K blocks and provide DMA page addresses in 16K blocks which may match the 16K memory address blocks. The modification system includes a mapping RAM selectively providing translated addresses to enable addresses in a 16 megabyte extended address space. The modification system also includes a page register storing for each addressable 16K block of data for each DMA channel a page address within the extended address space.

    摘要翻译: 计算机系统包括有利地耦合在总线网络中的计算机地址修改系统,以选择性地转换16K个块中的存储器地址数据,并在16K个块中提供与16K个存储器地址块匹配的DMA页地址。 修改系统包括映射RAM,其选择性地提供翻译的地址以使得能够在16兆字节扩展地址空间中的地址。 该修改系统还包括一页面寄存器,用于存储针对每个DMA通道的每个可寻址的16K数据块,扩展地址空间内的页地址。

    Method of and apparatus for dispatching a processing element to a
program location based on channel number of received data
    8.
    发明授权
    Method of and apparatus for dispatching a processing element to a program location based on channel number of received data 有权
    基于接收到的数据的频道号将处理元件发送到节目位置的方法和装置

    公开(公告)号:US6167471A

    公开(公告)日:2000-12-26

    申请号:US172994

    申请日:1998-10-14

    CPC分类号: H04L49/90

    摘要: An apparatus for dispatching a processing element to a program location based on a channel number of received data includes a channel pointer register having a number of storage locations each with a channel number field, a valid bit field and a corresponding instruction pointer field. When an isochronous channel is allocated for use for reception, the host device programs the channel number and a corresponding instruction pointer value into a storage location. When a storage location is programmed, a valid bit within that storage location is also preferably set. The corresponding instruction pointer value points to a series of instructions which are to be used to process data received on that isochronous channel. When isochronous data is then received, the channel number on which the data is received is compared to the channel numbers within the valid storage locations in the channel pointer register. If one of the channel numbers within a valid storage location matches the channel number of the received data, then the corresponding instruction pointer value is output and the data is processed according to a series of instructions beginning at the location specified by the corresponding instruction pointer value. Otherwise, if the channel number of the received data does not match any of the channel numbers within valid storage locations then a default instruction pointer value is output and the received data is processed according to a series of instructions beginning at the location specified by the default instruction pointer value.

    摘要翻译: 一种用于基于接收数据的频道号将处理元件分配到节目位置的装置包括具有多个存储位置的频道指针寄存器,每个存储位置具有频道号字段,有效位字段和相应的指令指针字段。 当同步信道被分配用于接收时,主机设备将信道号和相应的指令指针值编程到存储位置。 当存储位置被编程时,也优选地设置该存储位置内的有效位。 相应的指令指针值指向要用于处理在同步信道上接收的数据的一系列指令。 当接收到等时数据时,将接收数据的通道号与通道指针寄存器中的有效存储位置内的通道号进行比较。 如果有效存储位置中的一个通道号与接收到的数据的通道号匹配,则输出相应的指令指针值,并根据从相应指令指针值指定的位置开始的一系列指令来处理数据 。 否则,如果接收到的数据的通道号与有效存储位置内的任何通道号不匹配,则输出默认指令指针值,并根据从默认值指定的位置开始的一系列指令来处理接收到的数据 指令指针值。

    Method for implementing scheduling mechanisms with selectable resource modes
    10.
    发明授权
    Method for implementing scheduling mechanisms with selectable resource modes 有权
    用可选资源模式实现调度机制的方法

    公开(公告)号:US06453376B1

    公开(公告)日:2002-09-17

    申请号:US09521334

    申请日:2000-03-09

    IPC分类号: G06F1200

    摘要: A method for implementing scheduling mechanisms with selectable resource modes comprises at least one resource characterization set that includes a plurality of resource characterizations that each have resource requirements for executing a requested process. The plurality of resource characterizations may include a most mode, a best mode, and a worst mode. An allocation manager may then select a resource mode, and compare the corresponding resource requirements for the requested process to the currently-available device resources. The allocation manager may then authorize or deny the requested process depending upon whether the currently-available resources are sufficient to adequately service the resource requirements of the requested process.

    摘要翻译: 用于用可选资源模式实现调度机制的方法包括至少一个资源表征集合,其包括多个资源表征,每个资源表征都具有用于执行所请求的进程的资源需求。 多个资源表征可以包括大多数模式,最佳模式和最差模式。 然后,分配管理器可以选择资源模式,并将所请求进程的相应资源需求与当前可用的设备资源进行比较。 然后,分配管理器可以根据当前可用的资源是否足以充分地满足所请求进程的资源需求来授权或拒绝所请求的进程。