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Technical aspects of a computerised management information stystem. Part II.
Douglas M; Robson K
Min Technol 1983 Jun; 65(752):212-218
The first major component part to be considered in greater detail is the colliery primary computer; this being a POP 11/34 type computer. Like most computers, it can be divided into two particular sections: (1) Centralised processing unit (cpu) (2) Areas associated with memory Referring to Fig 1, which is a simplified block diagram. At the top of the diagram associated with the information highway we have the cpu with is own set of micro instructions, associated with it. These instructions explain to the cpu how it goes about dealing with instructions it sees in the program counter and gives to the cpu its ability to function. The processing unit looks at instructions in the program counter and on reading the instruction allows itself to be directed to the appropriate part of the system, at which time it fulfills its obligation to the instruction. The cpu deals with all instructions it sees in the program counter in the same manner, i.e. (1) Looks at an instruction in program counter and memorises it, (2) It up-dates the instruction by two, (3) It complies with the instructions, (4) Comes back to program counter for new instruction The processing unit in effect, deals with instructions in a sequential and predetermined manner in accordance with instructions laid down by the MINOS software. Beneath and to the left of the unibus are the main memory arrangements. Programs in this section are drawn from the MINOS floppy disc, which had been drawn from the library of MINOS discs and gives our primary computer its ability to be a 'FIDO' computer. The information on the disc has been written onto the disc by two independent bodies.
OP; Journal Article
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Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division