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Unlike page table entries in most MMUs, page table entries in the VAX MMU lack an accessed bit. [18]: 203–205 OSes which implement paging must find some way to emulate the accessed bit if they are to operate efficiently. Typically, the OS will periodically unmap pages so that page-not-present faults can be used to let the OS set an accessed bit.
The MEMC, providing the MMU capabilities in the system architecture, was designed to be simpler to implement than contemporary MMUs, [15]: 155 providing a 128-entry lookup table that effectively partitioned physical RAM into 128 equally sized pages, with a 4 MB address space divided into 128 pages resulting in the 32 KB page size employed in ...
In computing, an input–output memory management unit (IOMMU) is a memory management unit (MMU) connecting a direct-memory-access–capable (DMA-capable) I/O bus to the main memory. Like a traditional MMU, which translates CPU -visible virtual addresses to physical addresses , the IOMMU maps device-visible virtual addresses (also called device ...
Proprietary, with a free-to-use edition (Polyhedra Lite) Relational (SQL, ODBC, JDBC) in-memory database system originally developed for use in SCADA and embedded systems, but used in a variety of other applications including financial systems. Supports data durability via snapshots and journal logging, and high availability via a hot-standby.
It's because the happy-hued adult toys are sold in Walmart, are easy to use *and* on average cost around $30. Yet the quality is still there—medical-grade silicone, water-resistant chassis and ...
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Historical lowest retail price of computer memory and storage Electromechanical memory used in the IBM 602, an early punch multiplying calculator Detail of the back of a section of ENIAC, showing vacuum tubes Williams tube used as memory in the IAS computer c. 1951 8 GB microSDHC card on top of 8 bytes of magnetic-core memory (1 core is 1 bit.)
For data requests that fall between the table's samples, an interpolation algorithm can generate reasonable approximations by averaging nearby samples." [8] In data analysis applications, such as image processing, a lookup table (LUT) can be used to transform the input data into a more desirable output format. For example, a grayscale picture ...