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As has been indicated, some of the more frequently used ECS actions spend half of their time obtaining and checking parameters (e.g., ECS file read and writes, and event channel actions). This chapter contains a proposal to reduce this overhead. It is a hardware capability mechanism, similar to that in MAGNUM and System 250, with the addition of type information. Before examining the proposal, we first examine the details of obtaining and checking parameters in CAL TSS.


Paul McJones