FUNCTIONAL STRUCTURE OF A DATA CONTROL PROCESSOR OPERATION SYSTEM

Yu. N. Mazurin, G. P. Okhrimenko., S. A. Petunin
Vant. Ser. Metodiki i Programmy Chislennogo Resheniya Zadach Matematicheskoy Fiziki 1983. Вып.3. С. 59-61.

      A description of the OS-100MD operation system for SM-4 minicomputer is given which provides a control function for 100 MB discs in the BESM-6 based multicomputer complex. The OS-100MD functional structure is presented.
      A detailed description of its kernel is provided which implements a base level control within the operation system. The 0S-100MD reliability requirements are examined along with several techniques allowing to avoid, detect, and correct errors caused by hardware malfunctions or nonfatal failures.

      A disc operation system (DOS SP) is developed for a connected processor based on the M400 minicomputer. The main concepts used in the OS are described. The OS multitask operation requirements are examined. The connected processor data flow control is studied. Two job classes (C-and T-jobs) are justified which take into account the M400 features when operating as a connected processor. The DOS SP allows a data transfer between the BESM-6 computer system and remote terminal computers (such as SM-4). The connected processor access to the multicomputer shared disc storage permits to achieve a high system throughput by exploiting this communication link in an efficient manner. In addition, the paper describes a simple BESM-6 /connected processor communication protocol.