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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
RAM drive software allows part of a computer's RAM (memory) to be seen as if it were a disk drive, with volume name and, if supported by the operating system, drive letter. A RAM drive has much faster read and write access than a hard drive with rotating platters, and is volatile, being destroyed with its contents when a computer is shut down ...
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]
FIFO RAM controller 40 74F411: 74x412 1 multi-mode buffered 8-bit latches (equivalent to Intel 3212/8212) three-state 24 SN74S412: 74x413 1 256-bit FIFO memory (64x4) 16 74F413: 74x414 1 interrupt priority controller for Intel 8080 (equivalent to Intel 8214) 24 UCY74S414: 74416 1 modulo 10 counter, preload and clear inputs 16 MC74416 [8]: 50 ...
This is a list of interface bit rates, is a measure of information transfer rates, or digital bandwidth capacity, at which digital interfaces in a computer or network can communicate over various kinds of buses and channels.
A RAM drive (also called a RAM disk) is a block of random-access memory (primary storage or volatile memory) that a computer's software is treating as if the memory were a disk drive (secondary storage). RAM drives provide high-performance temporary storage for demanding tasks and protect non-volatile storage devices from wearing down, since ...
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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 ...