<> <> <> <> <<>> General System Timing: Normal Instruction Flow - Fetch & Dec| Execute Fetch & Dec| Execute <<>> Memory Read/Write - Fetch & Dec| Execute Fetch & Dec| Map | RAS/CAS | Wt. Back | Dead Fetch & Dec| Execute Block Read/Write (2 words) - Fetch & Dec| Map | RAS/CAS | Wt. Back | Wt. Back | Dead Fetch & Dec| Execute