SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
A control descriptor is the mechanism that is used in a list to give commands to the List Manager. These descriptors are not considered consumed until the List Manager has done the instruction required by the descriptor. All control descriptors have a common Header located at Word 3 but the remaining words are based on the specific control descriptor.