extracode造句

The final three were denoted as " extracode instructions " because they were accessed by performing a special type of TC instruction ( called EXTEND ) immediately before the instruction.
If the uppermost bit was set to one, this was an Extracode and was implemented as a special kind of subroutine jump to a location in the fixed store ( address being determined by the other nine bits.
It's difficult to find extracode in a sentence. 用extracode造句挺难的