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Standard RAM was 1 MB and the video card was the same as in the PC 10 and 20. It had one 1.2 MB HD 5.25-inch drive and a 20 MB hard drive. The cabinet had a key lock switch added Notes: The "PC AT" is a "PC 40" with a "AT" added to the name. Commodore PC AT. The "PC AT" is a "PC 40" with a "AT" added to the name. Commodore PC 40-40
The idea behind tmpfs is similar in concept to a RAM disk, in that both provide a file system stored in volatile memory; however, the implementations are different. While tmpfs is implemented at the logical file system layer, a RAM disk is implemented at the physical file system layer. In other words, a RAM disk is a virtual block device with a ...
Similarly, extra long 45 ft (13.72 m) containers are commonly counted as just two TEU, no different from standard 40 feet (12.19 m) long units. Two TEU are equivalent to one forty-foot equivalent unit (FEU). [55] [56] In 2014 the global container fleet grew to a volume of 36.6 million TEU, based on Drewry Shipping Consultants' Container Census.
Firstly, the page table walker, which uses physical addresses to access the page table and directory, can now access physical addresses greater than the 32-bit physical addresses supported in systems without PAE. From CR3, the page table walker can access page directories and tables that are beyond the 32-bit range. Secondly, the physical ...
The IBM 305 RAMAC was the first commercial computer that used a moving-head hard disk drive (magnetic disk storage) for secondary storage. [1] The system was publicly announced on September 14, 1956, [2] [3] with test units already installed at the U.S. Navy and at private corporations. [2]
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Virtual memory systems abstract between physical RAM and virtual addresses, assigning virtual memory addresses both to physical RAM and to disk-based storage, expanding addressable memory, but at the cost of speed. NUMA and SMP architectures optimize memory allocation within multi-processor systems. While these technologies dynamically manage ...
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