VAX

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VAX
instruction set architecture (en) , central processing unit (en) , computer system (en) , computing platform (en) da computer model series (en)
Bayanai
Ƙaramin ɓangare na	na'ura
Ranar wallafa	25 Oktoba 1977
Manufacturer (en)	Digital Equipment Corporation (en)
Designed by (en)	William D. Strecker (en)
Operating system (en)	OpenVMS, Ultrix (en) , Berkeley Software Distribution (en) , Linux (en) da NetBSD (en)

VAX shine tsarin koyar da CISC da aka kafa gine-gine (ISA) da layin manyan injiniyoyi da wuraren aiki wanda Kamfanin Kayan Kayan Dijital (DEC) ya haɓaka a tsakiyar 1970s. VAX-11/780, wanda aka gabatar a ranar 25 ga watan Oktoba, a shekara ta 1977, shi ne na farko na kewayon mashahurai da manyan kwamfutoci masu aiwatar da VAX ISA. Fiye da samfura 100 aka gabatar a tsawon rayuwar ƙirar,^{[ana buƙatar hujja]} tare da membobin ƙarshe da suka isa farkon shekarar 1990s. DEC Alpha ya ci nasarar VAX, wanda ya haɗa da fasali da yawa daga injin VAX don sauƙaƙe ɗaukar hoto daga VAX.

An tsara VAX a matsayin wanda zai maye gurbin 16-bit PDP-11, ɗaya daga cikin mafi ƙarancin minicomputers a cikin tarihi tare da misalai kusan 600,000 da aka sayar. An tsara tsarin don bayar da jituwa ta baya tare da PDP-11 yayin da ake fadada ƙwaƙwalwar zuwa cikakken aiwatar da 32-bit da ƙara buƙatun da aka tsara ƙwaƙwalwar ajiya . Sunan VAX yana nufin manufar "Virtual Address eXtension " wanda ya ba da damar shirye-shirye su yi amfani da wannan sabon ƙwaƙwalwar ajiyar yayin da har yanzu suna dacewa da lambar PDP-11 da ba a canza ba. An zaɓi sunan "VAX-11", wanda aka yi amfani da shi a farkon samfuran, don haskaka wannan damar.

Daga baya samfuran a cikin jerin sun yi watsi da alamar -11 kamar yadda jituwa ta PDP -11 ba ta zama babbar damuwa ba. Layin ya faɗaɗa zuwa manyan injina biyu kamar VAX 9000 har ma da tsarin aiki -scale kamar jerin VAXstation . Iyalin VAX a ƙarshe sun ƙunshi zane -zane iri daban -daban da sama da samfuran mutum 100 gaba ɗaya. Duk waɗannan sun dace da junansu kuma galibi suna gudanar da ingantaccen tsarin aikin VAX/VMS .

VAX an gane da matsayin quintessential CISC ISA, tare da manya-manyan yawan jama'ar-harshen-shirye-shiryen-friendly magance halaye da kuma inji umarnin, sosai orthogonal gine, da kuma umarnin for hadaddun ayyukan kamar jerin gwano sa ko shafewa, yawan tsarawa, da kuma polynomial kimantawa.