HP 3000 Manuals HP 3000 Manuals
Data Stack (changed) The demand-paged virtual memory scheme and the greatly expanded addressing range of the Hewlett-Packard Precision Architecture have eliminated the need for programmatic manipulation of the NM stack. In MPE XL, the operating system itself controls the NM stack and maintains efficient program operation. When programming in the high-level languages available in the 900 Series HP 3000 NM programming environment, all manipulations of the NM stack are accomplished by the operating system. Your NM program cannot manipulate the NM stack using optional parameters found in process management intrinsics, except when you are creating a new process. When you use the CREATEPROCESS intrinsic to create a new process, you are allowed to specify the maximum allowable size of the NM stack and the NM heap. Additionally, you can manipulate the CM stack if your NM program specifies a CM program when it creates a new process. When a process management intrinsic is called by a program executing in Compatibility Mode (CM), intrinsic parameters continue to manipulate the Compatibility Mode stack as described in the MPE V/E Intrinsics Reference Manual (32033-90007). An exception to this rule is when your CM program creates a process that executes in NM; in this case, stack manipulation parameters described in the MPE V/E Intrinsics Reference Manual are ignored, and two new optional parameters are available that allow you to specify the maximum allowable size of the NM stack and the NM heap.