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    • 4. 发明授权
    • Data cache management system with test mode using index registers and
CAS disable and posted write disable
    • 数据缓存管理系统具有测试模式使用索引寄存器和CAS禁用和发布写禁用
    • US5276833A
    • 1994-01-04
    • US544821
    • 1990-07-02
    • Stuart T. AuvinenWilliam H. Nale
    • Stuart T. AuvinenWilliam H. Nale
    • G06F11/22G06F12/08G11C29/52
    • G11C29/52G06F11/22G06F12/0802
    • A memory controller which can be used with an external tag RAM is disclosed. Existing index registers in the controller serve double duty as buffers for storing tag RAM data during a test mode. Input/output lines for the external tag RAM are coupled to the index registers in addition to being coupled to a comparator for comparison with an external address during normal operation. A buffer is provided so that data from the external address from the CPU can be written through these same tag RAM input/output lines in order to update the tag RAM after a miss. In order to prevent DRAMS from putting data on the memory bus during a cache RAM test, a CAS inhibit signal is provided to the DRAM state machine. Posted writes are also disabled to avoid interference with the address provided to the tag RAM.
    • 公开了可以与外部标签RAM一起使用的存储器控​​制器。 控制器中的现有索引寄存器在测试模式期间用作存储标签RAM数据的缓冲器。 外部标签RAM的输入/输出线除了在正常操作之前与外部地址相比较之外还与比较器耦合到索引寄存器。 提供了一个缓冲区,使得来自CPU的外部地址的数据可以通过这些相同的标签RAM输入/输出线写入,以便在错过后更新标签RAM。 为了防止DRAMS在高速缓存RAM测试期间将数据置于存储器总线上,CAS禁止信号被提供给DRAM状态机。 发布的写入也被禁用,以避免干扰提供给标签RAM的地址。
    • 5. 发明授权
    • Address translator for a shared memory computing system
    • 共享内存计算系统的地址转换器
    • US5793385A
    • 1998-08-11
    • US662057
    • 1996-06-12
    • William H. Nale
    • William H. Nale
    • G06F12/02G06F12/06
    • G06F12/0292
    • An address translator for use in a system having a central processing unit, a graphics controller for generating graphics addresses which index a graphics memory address map and for feeding data to a visual display, and a system memory converts a graphics address to a system address within the system memory. The invention initially partitions the system memory into a dedicated system memory for use by the graphics controller and a non-dedicated system memory for use by the central processing unit. The dedicated system memory corresponds to a base assigned memory within the graphics memory address map, and the non-dedicated system memory corresponds to a portion of the graphics memory address map excluding the base assigned memory. If the graphics address is within the base assigned memory, the graphics address is translated to a corresponding system address within the dedicated system memory. If the graphics address is within the portion of the graphics memory address map excluding the base assigned memory, the address translator converts the graphics address to a system address within the non-dedicated system memory, which designates a starting address of an available system memory block. Upon completion of the translation of the graphics address to the non-dedicated system memory, the boundary selector then selects a specific address within this allocated memory block corresponding to the graphics address.
    • 一种用于具有中央处理单元的系统中的地址转换器,用于产生图形地址的图形控制器的图形控制器,用于将图形存储器地址映射索引并将数据馈送到可视显示器,并且系统存储器将图形地址转换为系统地址 系统内存。 本发明最初将系统存储器划分为专用系统存储器,供图形控制器和非专用系统存储器供中央处理单元使用。 专用系统存储器对应于图形存储器地址图中的基本分配的存储器,并且非专用系统存储器对应于除基本分配的存储器之外的图形存储器地址映射的一部分。 如果图形地址在基本分配的存储器内,则图形地址被转换为专用系统存储器内的相应系统地址。 如果图形地址在除了基本分配的存储器之外的图形存储器地址映射的部分内,则地址转换器将图形地址转换为非专用系统存储器中的系统地址,其指定可用系统存储器块的起始地址 。 当完成将图形地址转换到非专用系统存储器时,边界选择器然后选择与该图形地址相对应的该分配的存储块内的特定地址。