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In 1997, NEC introduced the PC98-NX series as a main personal computer line that conformed to the PC System Design Guide and was Windows-based IBM PC compatible but not DOS/V compatible. [44] The PC-9801's last successor was the Celeron -based PC-9821Ra43 (with a clock frequency of 433 MHz, using a 440FX chipset-based motherboard design from ...
The Japanese NEC Corporation produced several personal computers, including the NEC PC-6001, NEC PC-8801 and NEC PC-9801. Subcategories This category has the following 7 subcategories, out of 7 total.
DDR3 memory chips are being made commercially, [11] and computer systems using them were available from the second half of 2007, [12] with significant usage from 2008 onwards. [13] Initial clock rates were 400 and 533 MHz, which are described as DDR3-800 and DDR3-1066 (PC3-6400 and PC3-8500 modules), but 667 and 800 MHz, described as DDR3-1333 ...
Storage as distinct from memory in the early days of computing was always external to the computer as for example in the punched card devices and media. Today storage devices may be internal or external to a computer system. In the 1950s, introduction of magnetic tapes and hard disk drives allowed for mass external storage of information, which ...
Some other computer architectures use different modules with a different bus width. In a single-channel configuration, only one module at a time can transfer information to the CPU. In multi-channel configurations, multiple modules can transfer information to the CPU at the same time, in parallel.
PC-88 VA3 NEC μPD9002 8 MHz 512 KB 256 KB No Yes Yes Yes FM (YM2608) Stereo + ADPCM Mono: Yes 2× 5.25" 2HD / 1× 3.5" 2TD No add 2TD FDD PC-8801 FE NEC μPD70008 8 MHz 64 KB 48 KB No Yes Yes No FM (YM2203) Mono: Yes 2× 5.25" 2D No TV(NTSC) output (composite video), del external I/O PC-8801 MA2 NEC μPD70008 8 MHz 192 KB 48 KB No Yes Yes No
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The memory cell is the fundamental building block of computer memory. The memory cell is an electronic circuit that stores one bit of binary information and it must be set to store a logic 1 (high voltage level) and reset to store a logic 0 (low voltage level). Its value is maintained/stored until it is changed by the set/reset process.