486


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486

486

The fourth generation of the Intel x86 family of CPU chips. The term may refer to the chip or to a PC that used it. Introduced in 1989, it was the successor to the 386 and the first chip in the line to include a built-in math coprocessor. Providing acceptable performance for DOS, it was bare minimum for Windows. Later versions of the chip doubled and tripled internal speeds (see DX2 and DX4). See OverDrive CPU, PC and x86.

Technical Specs
Type: 32-bit multitasking microprocessor
Transistors: 1,100,000 to 1,200,000 (1.0 micron)
Package: 168 or 169-pin PGA
Registers: 32 32-bit
Real Mode: Performs as a 16-bit 8086 CPU; addresses 1MB memory.
Protected Mode: Addresses 4GB physical and 64TB virtual memory; provides access to memory protection and 32-bit instructions.
Virtual 8086 Mode: Protected Mode subset that runs a Real Mode application in a virtual machine.


References in periodicals archive ?
Despite the repeated assertion by Potts and several other presenters that RU 486 is safe, there was actually evidence presented that some participants were concerned about some of the pill's side effects.
355(b) (1988), for RU 486 (mifepristone) for use as a pharmaceutical abortifacient.
AMD said it began shipping 486 chips for PCs that run about 20 percent faster than its existing 486 models.
RU 486 should be viewed as a beginning, not an end.
Bold strategies are needed to fight for the testing and availability of RU 486, but I doubt that Lader's two proposals--developing an exact copy of RU 486 and developing a pill that works similarly to RU 486--are feasible.
The cola wars continue with advanced micro devices (AMD) and Cyrix currently challenging Intel for the 486 market while Cyrix has also targeted the 80386 market with its Cx486D[Rx.
A 486 needs a minimum of 4, but 8 Mb are recommended for a computer to run Windows at a reasonable speed.
Officials at the council say they will begin conducting clinical trials of RU 486, a step necessary to gaining Food and Drug Administration approval.
RU 486 is also used in cases of difficult and prolonged labor, often reducing the need for a caesarean section.
Cuadra, STAR's new ability to run on 386 and 486 systems, along with the new, low entry-level prices, will lead to many more STAR sales into work environments with only a few users, as well as into larger PC-, and UNIX-oriented environments, such as federal agencies and universities.
I think this article is going to irrevocably change the political landscape of RU 486 in the United States," says David A.
For women in developed countries, RU 486 does away with the physical and emotional pain of surgical abortion; if she takes the drug soon after a missed period, a woman will never know whether she was pregnant.