Tsev > Exhibition > Ntsiab lus

Tshuab tshuab luam ntawv Intel

Mar 14, 2019

Thawj IBM PC nrog lub qhov (socket) rau Intel 8087 floating-point coprocessor (aka FPU) uas yog ib qho kev xaiv rau cov neeg siv PC rau computer-aided tsim los yog kev ua lej. Nyob rau hauv lub architecture ntawd, lub tshuab ua haujlwm txuas mus rau cov floating-point arithmetic ntawm qhov kev txiav txim ntawm fiftyfold. Cov neeg siv uas tsuas yog siv PC rau kev sau ua lus, piv txwv li, tau txais tus nqi siab ntawm tus xibfwb, uas yuav tsis muaj kev ua haujlwm ntawm cov ntawv sau ua haujlwm.


Lub 8087 tau nruj heev nrog 8086/8088 thiab teb rau floating-point tshuab chaws lag luam tso rau hauv 8088 kev qhia ntawv. Tus 8088 processor tsis muaj 8087 yuav tsis txhais cov lus qhia no, yuav tsum tau cais cov kev pabcuam rau cov haujlwm FPU thiab cov tsis-FPU, lossis tsawg kawg ntawm kev xeem rau lub sijhawm los txheeb FPU thiab xaiv cov library mathematical haum.



Intel 80386DX CPU nrog 80387DX lej coprocessor

Lwm tus neeg ua haujlwm rau 8086/8088 chav ua haujlwm nruab nrab yog 8089 tawm tswv yim / tso tawm rau tus tub luam. Nws siv tib lub txheej txheem programming li 8087 rau kev tawm tswv yim / tso tawm, xws li hloov cov ntaub ntawv los ntawm kev nco rau ib lub tshuab ntaus peripheral, thiab txo cov khoom ntawm CPU. Tab sis IBM tsis siv nws hauv IBM PC tsim thiab Intel nres kev loj hlob ntawm hom kev ua hauj lwm no.


Intel 80386 microprocessor siv lub yeem "ua lej" tus cwj pwm (hauv 80387) los ua cov haujlwm taw ntiav ncaj qha rau hauv kev kho vajtse. Intel 80486DX processor muaj ntiv nplhaib rau lub nplhaib. Intel tso tawm ib processor-reduced cost, tus 80486SX, uas tsis muaj cov khoom ntiv nplhaib floating, thiab tseem muag ib qho 80487SX tus xibfwb uas tseem ceeb tsis taus lub ntsiab processor thaum ntsia, txij li 80487SX yog ib qho tiav 80486DX nrog ntau txheej kev sib txuas ntawm tus pin.


Intel processors tshaj li 80486 integrated floating-point kho vajtse ntawm lub ntsiab processor nti; cov kev kho tshiab hauv kev koom ua ke tshem tawm cov nqi kom zoo dua ntawm kev muag cov floating point processor ua lwm lub npe. Nws yuav nyuaj rau kev hloov kho vaj huam sib luag ntawm cov tswv yim tsim nyog ntawm 75 MHz processor ceev kom ua tau raws li lub sij hawm qeeb, kev siv hluav taws xob, thiab xov tooj cua zaus cuam tshuam ntawm gigahertz-ntau moos speeds. Cov teeb meem nyob rau hauv-nti floating point processors tseem raug xa mus rau kev ua haujlwm vim tias lawv ua haujlwm hauv qhov tseem ceeb nrog CPU lub ntsiab.


Thaum lub caij nyoog ntawm 8-thiab 16-ntsis duab computers computers lwm qhov ntawm floating-point coprocessors yog Weitek. Cov coprocessors muaj ib cov kev qhia ntau los ntawm Intel cov tshuab luam yeeb, thiab siv ib lub hnab siv sib txawv, uas tsis yog tag nrho niam tsev txhawb. Cov kev sib tham hauv Weitek tsis muab cov kev ua lej hauv kev ua lej (piv txwv li, trigonometric functions) zoo li Intel x87 tsev neeg, thiab yuav tsum muaj cov software qiv rau kev txhawb nqa lawv cov haujlwm.