Table of Contents
Advertisement
2. DATANET-30 COMPONENTS
GENERAL DESCRIPTION
The DA TANET-30 consists
of:
The data communications processor, to control the input/ output flow of data, and manipulate
the data as necessary.
Buffers to connect the communication facilities to the communications processor.
Buffers to interconnect computers.
Buffers to connect computer peripheral equipment to the communications processor.
Data Communications Processor
The communications processor contains a core memory, power supply, control and working
registers, and the buffer selector.
The magnetic core memory stores program instructions, alphanumeric information, and binary
data.
Standard memory units are available in sizes of 4,096, 8,192 and 16,384 words. Each word
consists of 18 bits.
The memory cycle time is 6. 94 microseconds for a read-restore cycle, a
clear-write cycle, or a read-compute-write cycle.
During a read-restore cycle, 18 bits of information are read from the memory and transferred
to the working registers.
During a clear-write cycle, 18 bits of information are transferred from the working registers
and written into memory.
During a read-compute-write cycle, 18 bits of information are read from memory, modified, and
the new information is written back into memory.
The control and working registers include: An arithmetic unit capable of an 18-bit binary add; and
logic for data manipulation.
[ID£1J£rm~11c:J ~®------------
-17-
Advertisement
Table of Contents
