PC Bus

àÁ×èÍ IBM ä´é·Ó¡ÒÃà»Ô´µÑÇ IBM PC ( XT ) µÑÇáá «Öè§ãªé CPU 8088 à»ç¹ CPU ¢¹Ò´ 8 Bit ´Ñ§¹Ñé¹ à¤Ã×èͧ Computer à¤Ã×èͧ¹Õé ¨Ö§ÁÕàÊé¹·Ò§¢éÍÁÙÅà¾Õ§ 8 àÊé¹·Ò§ ( 8 data line ) áÅÐ àÊé¹·Ò§·ÕèÍÂÙè 20 àÊé¹·Ò§ ( 20 address line ) à¾×èÍãªé㹡ÒÃÍéÒ§µÓá˹觢ͧ˹èǤÇÒÁ¨Ó

Card ·Õè¹ÓÁÒµè͡Ѻ PC Bus ¹Ñé¹ ¨Ðà»ç¹ Card Ẻ 62 pin «Öè§ 8 pin ãªéÊÓËÃѺÊ觢éÍÁÙÅ ÍÕ¡ 20 pin äÇéÊÓËÃѺÍéÒ§µÓá˹觢ͧ˹èǤÇÒÁ¨Ó «Öè§ CPU 8088 ¹Ñé¹ ÊÒÁÒöÍéÒ§Íԧ˹èǤÇÒÁ¨Óä´éà¾Õ§ 1 Megabyte «Öè§ ã¹áµèÅÐ pin ¹Ñé¹ ÊÒÁÒöÊ觢éÍÁÙÅä´éà¾Õ§ 2 ¤èÒ ¤×Í 0 ¡Ñº 1 ( ËÃ×Í Low ¡Ñº High ) ´Ñ§¹Ñé¹ àÁ×èÍãªé 20 pin ¡ç¨ÐÍéÒ§ÍÔ§µÓá˹è§ä´é·Õè 2 ¤Ù³¡Ñ¹ 20 ¤ÃÑé§ ( ËÃ×Í 2 ¡¡ÓÅѧ 20 ) «Ö觡ç¨Ðä´éà·èҡѺ 1 Meg. ¾Í´Õ Êèǹ pin ·ÕèàËÅ×Í ¡çãªéà»ç¹µÑÇ¡Ó˹´¡ÒÃÍèÒ¹¤èÒ ÇèÒÍèÒ¹¨Ò¡µÓá˹觢ͧ˹èǤÇÒÁ¨Ó ËÃ×Í µÓá˹觢ͧ Input/Output ËÃ×Í ºÒ§ pin ¡çãªéÊÓËÃѺ¨èÒÂä¿ +5, -5, +12 áÅÐ ÊÒ Ground ( ÊÒ´Թ ) à¾×èͨèÒÂä¿ãËé¡Ñº Card ·Õèµè;èǧº¹ Slot ¢Í§ PC Bus ¹Ñè¹àͧ áÅÐ ÂѧÁÕ pin ºÒ§µÑÇ·Õè·Ó˹éÒ·Õèà»ç¹µÑÇ reset ËÃ×Í à»ç¹µÑÇ refresh ËÃ×ÍáÁé¡ÃзÑè§ clock ËÃ×Í ÊÑ­­Ò³¹ÒÌԡҢͧÃкº¹Ñè¹àͧ

Ãкº Bus Ẻ PC Bus ¹Õé ÁÕ¤ÇÒÁ¡ÇéÒ§¢Í§ Bus à»ç¹ 4.77 MHz áÅÐ ÊÒÁÒöÊ觶èÒ¢éÍÁÙÅ´éǤÇÒÁàÃçÇÊÙ§ÊØ´·Õè 2.38 MB µèÍ ÇÔ¹Ò·Õ
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