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Firm figures on the total number of lines or remote stations that can be handled simultaneously,
or the number of messages per day, characters per hour or other statistics cannot be defined
because of the many variables--different combinations possible--from one system to another.
In general, one DATANET-30 will handle 1 million characters per hour or more. This depends
upon system parameters--speed and duplexing of lines, multipoint line control, whether or not
speed, code and format conversions are performed and other requirements. Each system must
be analyzed and balanced to obtain maximum system performance.
Integrated Data Processing
The inclusion of a computer in the overall system permits various methods of handling incoming/
outgoing messages. In one case, incoming data intended for the computer is transferred directly.
In another, the incoming data is stored first in a disc storage unit and retrieved by the computer.
A system may also store data on a disc storage unit or magnetic tape and transfer it to the com-
puter at a certain time of day for batch processing. Individual operating procedures and program
requirements will necessarily be developed for each system.
INSTRUCTION REPERTOIRE
There are over 78 basic instructions in the DATANET-30 repertoire, with many variations of
some of them. These are broadly classified into three groups:
A.
Internal Instructions
B.
Buffer Selector Instructions
C.
Controller Selector Instructions
Internal Instructions
The Internal Instructions are further classified into 7 subgroups:
1.
Load
2.
Store
3.
Arithmetic
4.
Logical
5.
Register Transfer
6.
Branch
7.
Special
In the following discussion, an M in the Operand column means that the instruction refers to a
memory location.
All such instructions use one of the addressing modes; therefore, no specific
mention is made of the modes below. Also, provision has been made in the operation code struc-
ture for easily adding more bit change instructions for specific system requirements. I or FROM,
TO means that the information to be used in executing the instruction is the bits in the low-order
part of the instruction itself. For the purposes of this manual, the description of each instruction
is abbreviated.
A complete discussion of each instruction is in the Programmer's Reference
Manual.
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