Glossary

The following terms have been used frequently in this manual. They are explained below:

/390 mode

Runtime environment of the /390 processor (processor used in the SIEMENS 7.500 system (CISC)).

Program execution in /390 mode on SR2000 systems under OSD-SVP takes place under the control of the /390 firmware.

The /390 firmware is the firmware component of SINIX-2000 on SR2000 systems under OSD-SVP which is used to map /390 code to RISC code. It extends RISC mode and allows for the object-compatible execution (in /390 mode) of /390 code on RISC hardware.

activation

Whenever a task issues a request to the system after a period of inactivity (e.g. think time at a terminal), the system must take two decisions before processing can be continued:

1.The activation decision

2.The initiation decision

activation decision

This decision gives the task the right to use the CPU and to perform I/O operations. At activation time, the task is allocated as many main memory pages as it is likely to need.

Activation delays are possible in cases of resources overloading.

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Siemens U3585-J-Z125-8-76 1, SM2 monitoring system manual Mode, Activation decision