> Have one array grow normally from location#0, and the second array grow backwards from location#End. Fun fact: Itanium had two stacks, one for manual push/po

> Have one array grow normally from location#0, and the second array grow backwards from location#End. Fun fact: Itanium had two stacks, one for manual push/pop and another for cycling through the register file. One stack grew upward, another grew downward. A fascinating architecture, though it never delivered the promised performance.