ie ▁rock ▁groups ▁Category : Is ra eli ▁musical ▁tri os <0x0A> </s> ▁D SP / BI OS ▁Link ▁or ▁D SP LIN K ▁is ▁an ▁IP C ▁( inter processor ▁communic ations ) ▁scheme ▁for ▁passing ▁messages ▁and ▁data ▁in ▁multip ro cess or ▁systems . ▁In ▁the ▁case ▁of ▁the ▁Da V inci ▁D SP ▁family ▁from ▁Texas ▁Inst ru ments , ▁this ▁scheme ▁would ▁allow ▁passing ▁of ▁messages ▁and ▁data ▁between ▁an ▁AR M ▁ ▁client ▁and ▁a ▁D SP ▁server . ▁ ▁D SP LIN K ▁can ▁be ▁used ▁to ▁implement ▁a ▁layer ▁of ▁software ▁abstra ction ▁called ▁a ▁R PC ▁that ▁allows ▁a ▁remote ▁function ▁on ▁the ▁D SP ▁to ▁appear ▁as ▁local ▁function ▁calls ▁in ▁the ▁AR M ▁application ▁code . ▁ ▁The ▁Code c ▁Engine ▁IP C ▁communication ▁layer ▁is ▁implemented ▁using ▁a ▁R PC ▁call ▁scheme ▁built ▁on ▁top ▁of ▁D SP / BI OS ▁LIN K . ▁ ▁Over view ▁D SP / BI OS ▁LIN K ▁is ▁implemented ▁using ▁shared ▁memory ▁and ▁internal ▁interrupt s ▁from ▁the ▁AR M ▁to ▁the ▁D SP ▁and ▁vice ▁vers a . ▁▁ ▁The ▁shared ▁memory ▁protocol ▁for ▁IP C ▁is ▁implemented ▁as ▁follows : ▁ ▁The ▁AR M ▁and ▁D SP ▁are ▁program med ▁to ▁a ▁pre - det erm ined ▁memory ▁address ▁where ▁a ▁message ▁will ▁be ▁sent ▁from ▁the ▁AR M ▁to ▁the ▁D SP ; ▁and ▁another ▁for ▁messages ▁sent ▁from ▁the ▁D SP ▁to ▁the ▁AR M . ▁ ▁One ▁processor ▁sends