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I. GENERAL DESCRIPTION
The DATANET-30 is a single address, stored program, special purpose, digital computer
which operates primarily in a straight binary mode but processes both alphanumeric and binary
information.
It
performs computation (arithmetic) operations and acts as central control for
the DATANET-30 system.
Programs to be executed and data to be operated upon are stored
in a magnetic core memory where· each core represents a binary digit (bit) of an instruction
or data word. A word is the basic unit of addressable information in the memory.
The overall function is to simultaneously receive, store, process and transmit data in a com-
munications oriented system.
The system can accommodate any standard transmission speed ranging from 45 to 3,000 bits
per
1
second.
The basic DATANET-30 controls the transmission of digital data information
over normal common carrier facilities to either another DATANET-30, a DATANET-15, a
DATANET-600, or any of the standard teletype terminal units in use, such as the Automatic
Send Receive (ASR), Keyboard Send Receive (KSR), or Receive Only (RO) units.
The instruction repertoire contains 78 basic instructions and the hardware is capable of executing
over 144,000 instructions per second.
Figure 1 shows the major functional sections of the DATANET-30 Communication System,
consisting of:
1.
The buffer selector and associated buffer units
2.
T.h~ controlle~
selector and assoc.iated high-speed controllers
3.
The bATANET-30 Data Communications Processor.
iHE
'MEMORY UN'IT
The DATANET-30 uses a magnetic core memory to store program instructions, alphanumeric
information, and binary data.
Standard memory units are available in 4096, 8192 and 16,384
word sizes.
Each word consists of 18 bits. An 18-bit word can contain three 6-bit characters,
'two 8-pit,
cµa,ractf3rs~
o;r ,one machine instruction.
[ID/A\1F&~~1FCJ ~@------------
I-1
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