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Thursday, September 29

VGA (Video Graphics Array)အေၾကာင္း(၂)


HDMI
HDMI ကေတာ့ High Definition Multimedia Interface ကိုညႊန္းဆိုတာပဲျဖစ္ပါတယ္။ HDMI ကိုသာမန္ graphic card ေတြမ်ာမေတြ့ရပဲ၊ Entertainment ဦးစားေပး ကဒ္ေတြနဲ့ High end card ေတြမွာပဲေတြ့ရပါတယ္။ HDMI မွာ High definition Video နဲ့ Audio ေတြကို ေပးပို ့ႏိုင္စြမ္းရိွပါတယ္။
ဒါေပမယ့္ သူ့နဲ့ခ်ိတ္ဆက္မယ့္ cable ေတြကေတာ့ ေစ်းၾကီးေနပါေသးတယ္။

Graphic Card Interfaces
ပံုမွာျပထားတာကေတာ့ Graphic Card Interface ျဖစ္ပါတယ္။ Graphic Card Interface ဟာ graphci card နဲ့ computer ၾကား ခ်ိတ္ဆက္ေပးတဲ့ အရာပဲျဖစ္ပါတယ္။
Graphic card ေတြကိုဝယ္ယူရာမွာ Interface ကအရမ္းကိုအေရးၾကီးပါတယ္။ ကိုယ့္ MB ရဲ့ Graphic card slot ဟာ ကိုယ္ဝယ္လာတဲ့ Graphic Card ရဲ့ Interface ခ်င္းကိုက္ညီမွဳမရိွဘူးဆိုရင္ တပ္ဆင္လို ့မရပါဘူး။ ဥပမာ အားျဖင့္ PCI Express graphic card ဟာ AGP slot မွာတပ္ဆင္လို့မရသလို AGP Graphic Card ကလည္း PCI Express slot မွာတပ္ဆင္လို့မရပါဘူး။ MB နဲ့ Graphic Card အျပန္အလွန္ data ေပးပို့ႏိုင္မွဳကို Bandwidth နဲ့တိုင္းတာပါတယ္။ Bandwidth ျမင့္ေလ graphic card က ျမန္ျမန္ဆန္ဆန္ အလုပ္လုပ္ႏိုင္ေလျဖစ္ပါတယ္။ ဒါေပမယ့္လဲ Graphic Card Industry ေတြေျပာသေလာက္ Interface တစ္ခုနဲ့တစ္ခု သိပ္ျပီးကြာျခားမွဳမရိွပါဘူး။
Interface ေတြဟာ အရင္တုန္းက အမ်ားၾကီးရိွေပမယ့္ လို ့အခုအခါမွာေတာ့ AGP နဲ့ PCI Express ပဲက်န္ပါေတာ့တယ္။ ဒါေပမယ့္ ဗဟုသုတ အေနနဲ့ေဖာ္ျပေပးလိုက္ပါတယ္။

ISA
ISA ဆိုတာက Industry Standard Architechure ကိုဆိုလိုပါတယ္။ သူကို ဟိုးအရင္တုန္းက ကြန္ပ်ဳတာေတြမွာပဲ ေတြ့ႏိုင္ပါတယ္။ အခုခ်ိန္မွာေတာ့ ေပ်ာက္ကြယ္သြားပါျပီ။ သူမွာ 8 bit wide interface နဲ့ 16 bit wide interface ဆိုၿပီး graphic card ႏွစ္မ်ိဳးထြက္ရိွပါတယ္။ EISA (Extended ISA) ဆိုၿပီးထြက္ေပၚလာပါေသးတယ္။ သူကေတာ့ 32 bit wide ရိွပါတယ္။ ဒါေပမယ့္ ေစ်းၾကီးတဲ့အတြက္ ေနာက္ထပ္ Interface အသစ္ထြက္ေပၚလာတဲ့အခါ ေမွးမိွန္သြားခဲ့တယ္။

PCI 
PCI က Peripheral Components Interconnect ကိုဆိုလိုပါတယ္။ သူက 32 bit wide interface ျဖစ္ၿပီး 33MHz speed နဲ့ run ပါတယ္။ 133 MB/s Bandwidth ကိုရရိွပါတယ္။ PCI ကို ISA ေတြေနရာမွာ အစားထိုးအသံုးျပဳပါတယ္။ PCI ေတြကို add in card ေတြအတြက္ ယခုထိစံထားသံုးစြဲေနေသးပါတယ္။ ဒါေပမယ့္ Graphic Card ေတြအတြက္ကေတာ့ မသံုးေတာ့ပါဘူး။

PCI X 
PCI -X ကေတာ့ PCI Extended ကိုဆိုလိုတာျဖစ္ပါတယ္။ သူ့မွာ 64 bit wide interface ရိွျပီး 4266 MB/s bandwidth ရိွပါတယ္။ ဒီကဒ္ေတြကို server ေတြမွာပဲအသံုးျပဳခဲ့ျပီး ေတြ႕ရခဲပါတယ္။ PCI X ကဒ္ေတြကို ကၽြန္ေတာ္တို ့ရဲ့ PCI ver 2.2 slot ေတြမွာတပ္ဆင္ႏိုင္ပါတယ္။ ဒါေပမယ့္ PCI Express slot ေတြမွာတပ္လို ့မရပါဘူး။

ဆက္လက္ေဖာ္ျပပါမည္.....

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