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    • 1. 发明授权
    • Data processing system a method for performing register renaming having
back-up capability
    • 数据处理系统用于执行具有备份能力的寄存器重命名的方法
    • US5694564A
    • 1997-12-02
    • US338
    • 1993-01-04
    • Mitchell AlsupMichael C. Becker
    • Mitchell AlsupMichael C. Becker
    • G06F9/34G06F9/38G06F11/14G06F12/00G06F12/02G06F12/08
    • G06F9/3863G06F9/3836G06F9/384G06F9/3857
    • In a data processing system, a method for performing register renaming with back-up capability. A register renaming apparatus (18) comprises a logical-physical (LP) register map (30), a free list (32), and an internal swap bus (90) for exchanging information between the two. The register renaming hardware (18) is connected to an instruction sequencer (12) and instruction decode/issue logic (16). Each time the decode/issue logic (16) decodes an instruction(s), the logical registers to be read index the LP map (30) to find the physical register "name" where their values can be found. The free list 32 is indexed by instruction slot numbers. Each free list cell (60-75) contains two physical register names a "last" and a "current", as well as pointer (80-83) designating which name is "current". As each write is done the "current" name is transferred to the LP map 30, and the previous physical register name in the LP map (30) is installed in the free list (32) in the place of the "last" name. The pointer (80) is then toggled so that the "last" becomes "current".
    • 在数据处理系统中,用于通过备份能力执行寄存器重命名的方法。 寄存器重命名装置(18)包括用于在两者之间交换信息的逻辑 - 物理(LP)寄存器映射(30),空闲列表(32)和内部交换总线(90)。 寄存器重命名硬件(18)连接到指令定序器(12)和指令解码/发行逻辑(16)。 每当解码/发布逻辑(16)解码指令时,要读取的逻辑寄存器将索引LP映射(30),以找到可以找到其值的物理寄存器“名称”。 空闲列表32由指令槽号索引。 每个空闲列表单元格(60-75)包含两个物理寄存器名称“最后”和“当前”,以及指定“(当前)”的指针(80-83)。 当每次写入完成时,将“当前”名称传送到LP映射30,并且将LP映射(30)中的先前的物理寄存器名称安装在空闲列表(32)中,代替“最后”名称。 然后,指针(80)被切换,使得“最后”变为“当前”。
    • 5. 发明授权
    • Method and apparatus for controlling a memory device in a page mode
    • 用于在页面模式下控制存储器件的方法和装置
    • US5848025A
    • 1998-12-08
    • US885434
    • 1997-06-30
    • Bryan D. MariettaLaura WeberMichael C. Becker
    • Bryan D. MariettaLaura WeberMichael C. Becker
    • G11C11/401G06F12/02G11C7/00G11C7/10G11C11/407G11C8/00
    • G11C7/1072
    • A method (600, 700) and apparatus (402) for controlling a memory device, such as a synchronous dynamic random access memory (404), includes a user-programmable register containing a new parameter, PRECHARGE DELAY TIME. A memory controller (402) uses the parameter to set a minimum limit through which each page is kept open after an initial access. Subsequent access to the same page cause the controller to reset the limit, thereby extending the open page. Accesses to different pages, refresh operations, and maximum row address strobe parameters can force the page closed. A user can tune the PRECHARGE DELAY TIME to keep pages open through the time period in which it is likely that additional accesses will be to the same page. Conversely, open pages can be closed after that time period is exceeded. In both cases, the memory device will be ready for a subsequent access with minimum latency.
    • 用于控制诸如同步动态随机存取存储器(404)的存储器件的方法(600,700)和装置(402)包括一个包含新参数PRECHARGE DELAY TIME的用户可编程寄存器。 存储器控制器(402)使用参数来设置在初始访问之后每个页面保持打开的最小限制。 随后访问同一页面将导致控制器重置限制,从而扩展打开的页面。 访问不同的页面,刷新操作和最大行地址选通参数可以强制页面关闭。 用户可以调整PRECHARGE DELAY TIME(PRECHARGE DELAY TIME),以便在可能在同一页面上进行附加访问的时间段内保持页面打开。 相反,超过该时间段后,打开的页面可以关闭。 在这两种情况下,存储器设备将准备好以最小延迟进行后续访问。