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    • 71. 发明授权
    • Method and apparatus for writing to memory components
    • 用于写入存储器组件的方法和装置
    • US5940340A
    • 1999-08-17
    • US858068
    • 1997-05-16
    • Frederick A. WareJohn B. DillonRichard M. BarthBilly Wayne Garrett, Jr.John Girdner Atwood, Jr.Michael P. FarmwaldRichard DeWitt Crisp
    • Frederick A. WareJohn B. DillonRichard M. BarthBilly Wayne Garrett, Jr.John Girdner Atwood, Jr.Michael P. FarmwaldRichard DeWitt Crisp
    • G11C7/10G11C11/401
    • G11C7/109G11C7/1006G11C7/103G11C7/1045G11C7/1078G11C7/1087
    • Additional operating modes are provided to enhance the functionality and performance of a memory system. In one embodiment, a unique bit mask is supplied with the write data used in each column access. In an alternate embodiment, a bit mask register and byte mask register are provided to support bit level and byte level masking. The bit mask and write data registers are realized as a single register to provide the functionality while minimizing component space and cost. In another embodiment, a separate bit mask and byte mask are provided. The byte mask is loaded with mask data in one cycle and is used during the next "q" column write accesses. This structure provides for operating modes with no bit masking, with bit masks supplied for every row access, and with bit masks supplied with every column access. In order to enhance the functionality of a system, such as a two-dimensional graphics system, in an alternate embodiment, the memory system is provided with two registers and a select control line to select data from one of two registers. In a computer graphics system, this is used to select between foreground and background colors. The embodiment can be utilized in conjunction with the other embodiments described to provide enhanced functionality and performance.
    • 提供额外的操作模式以增强存储器系统的功能和性能。 在一个实施例中,向每个列访问中使用的写入数据提供唯一的位掩码。 在替代实施例中,提供位掩码寄存器和字节掩码寄存器以支持位电平和字节电平掩蔽。 位掩码和写数据寄存器被实现为单个寄存器,以提供功能,同时最小化组件空间和成本。 在另一个实施例中,提供单独的位掩码和字节掩码。 字节掩码在一个周期内加载掩码数据,并在下一个“q”列写入访问期间使用。 该结构提供无位掩蔽的操作模式,每行访问提供位掩码,并提供每列访问的位掩码。 为了增强诸如二维图形系统的系统的功能,在替代实施例中,存储器系统具有两个寄存器和选择控制线,以从两个寄存器之一中选择数据。 在计算机图形系统中,用于在前景和背景颜色之间进行选择。 该实施例可以与所描述的其他实施例一起使用以提供增强的功能和性能。