▁processor ▁( o ften ▁Harris ▁C M OS ) ▁because ▁of ▁the ▁energy ▁dem ands ▁of ▁the ▁more ▁powerful ▁ 8 0 3 8 6 ▁on ▁the ▁original ▁CH M OS ▁III ▁process , ▁the ▁introduction ▁of ▁the ▁Intel ▁ 3 8 6 SL ▁processor , ▁designed ▁for ▁the ▁specific ▁power ▁needs ▁of ▁la pt ops , ▁marked ▁the ▁point ▁at ▁which ▁laptop ▁needs ▁were ▁included ▁in ▁CPU ▁design . ▁ ▁The ▁ 3 8 6 SL ▁integrated ▁a ▁ 3 8 6 S X ▁core ▁with ▁a ▁memory ▁controller ▁and ▁this ▁was ▁pa ired ▁with ▁an ▁I / O ▁chip ▁to ▁create ▁the ▁SL ▁ch ips et . ▁ ▁It ▁was ▁more ▁integrated ▁than ▁any ▁previous ▁solution ▁although ▁its ▁cost ▁was ▁higher . ▁ ▁It ▁was ▁heavily ▁adopted ▁by ▁the ▁major ▁not ebook ▁br ands ▁of ▁the ▁time . ▁ ▁Intel ▁followed ▁this ▁with ▁the ▁ 4 8 6 SL ▁ch ips et ▁which ▁used ▁the ▁same ▁architecture . ▁ ▁However , ▁Intel ▁had ▁to ▁abandon ▁this ▁design ▁approach ▁as ▁it ▁introduced ▁its ▁Pent ium ▁series . ▁▁ ▁Early ▁versions ▁of ▁the ▁mobile ▁Pent ium ▁required ▁T AB ▁mount ing ▁( also ▁used ▁in ▁L CD ▁manufact uring ) ▁and ▁this ▁initially ▁limited ▁the ▁number ▁of ▁companies ▁capable ▁of ▁supp lying ▁not ebook s . ▁ ▁However , ▁Intel ▁did ▁eventually ▁migr ate ▁to ▁more ▁standard ▁chip ▁pack aging . ▁ ▁One ▁limitation ▁of ▁not ebook s ▁has ▁always ▁been ▁the ▁difficulty ▁in ▁upgrad ing ▁the ▁processor ▁which ▁is ▁a ▁common ▁attribute