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 ?
The trials are to involve a total of 1,000 pregnant women who will receive either RU 486 or methotrexate in one of four Canadian cities - - Vancouver, Toronto, Quebec City, and Sherbrooke, Quebec.
Before testing the unit we had our doubts about performance gains using a Pentium CPU in a system designed for the '486. We were pleasantly surprised by Intel's design, adding additional processor cache (32K versus the Pentium's 16K) which boosts performance and tends to compensate for the narrower '486 bus (32 bit versus the Pentium's 64 bit).
c) RU 486/PG: Increases Severity Of Adverse RU 486 Effects And Presents Separate Complications
Overstatements about RU 486 could fill volumes, but beneath all the rhetoric most women's health experts and advocates agree on one basic point: used together with prostaglandin for the early termination of pregnancy, RU 486 has an excellent record of effectiveness, safety and acceptability in France, where almost 200,000 women have used it since 1989.
Instead of privatizing abortion, the use of RU 486 requires at least four, and as many as seven, trips to the hospital or clinic.
At the high end of Zenith Data Systems' 486 desktop family sits the Z-486/33E workstation, a state-of-the-art system for the most demanding CAD, CAE, windowing and mathematical analysis applications.
Congress is scrutinizing Food and Drug Administration policy on RU 486. Following pressure from Senator Jesse Helms and Representative Robert Dornan in 1989, the F.D.A.
The flare that had the largest effect on Earth emanated from Sunspot 486, which was near the center of the sun's disk when it erupted on Oct.
Even though the FDA has twice deemed RU 486 "approvable," first in 1996 and then this past February, it has held up final approval pending the resolution of certain manufacturing, labeling, and other issues whose details have generally not been divulged to the public.
Therefore, we will also investigate two separate 486 upgrade paths.
Although chip giant Intel wants the retail industry to move to an all-Pentium lineup now, the 486 processor will remain a viable processing platform through the remainder of '95 and then will die, several industry experts contend.
As exhibit 1 shows, 486 laptops outnumbered the 386 models in all but a few categories.