SU602948A1 - Device for shaping command addresses - Google Patents

Description

the device output and the first input of the command counter, the second and third inputs of which are the seventh and eighth control inputs for enabling information to be written to the device command counter, the second and third inputs of the index counter are the ninth and tenth control inputs of the information recorder index.

The drawing shows a block diagram of a device that contains control inputs 1-10, device output 11, command register 12, index adder 13, first switch 14, command adder 15, index counter 16, command counter 17, base register 18, adder base 19 (base adder), the second switch 20, information inputs 21, 22.

The device works as follows.

In accordance with the computer computer being executed (computer), control signals are sent to the device inputs 1-10. These signals determine the actions performed by the device during the generation of the executive address taken from output 11 ..

The control signal at input 1 permits the passage through the first switch 14 of the contents of the index adder 13, equal to A + CMS.

The control signal at the input 2 permits the address through the first switch 14 of the address part of the command from the command register 12.

The control signals at the inputs 3, 4, 5, b, cause the output of the second switch 20 and the output of the device 11 executive address, respectively, from the outputs of the total number

Actions performed by the control input device &

1,3

2.3

2.4

11:20: 19: 14 + 18

Il: 20: 19; l44-18

1.4

11: 20: 15: 17 + 12 A

6

88

17: 17 + 1

99

10 1O

pa of base 19, first switch 14, command counter 17 or command adder 15.

The control signal at input 7 causes the command 17 to write information from the device output 11 to the counter.

The control signal at the input 8 adds the unit to the contents of the command counter 17.

The control signal at the input 9 causes the recording in the index counter 16 of information from the output of the index adder 13.

The control signal at input 10 adds one to the contents of index counter 16.

When control signals are applied to the corresponding inputs, the device operates in one of 10 ways, according to the table, where the following designations are used:

,: - value assignment sign,

A - address part of the team,

12 A - address part of the contents of the command register,

4- "1 - adding to the block content,

  - designation of the contents of the block,

AI - executive address,

SchI - index counter,

Per B - base register,

ScK - command counter.

Thus, the device makes it possible to form the executive addresses relative to the instruction counter without using the main arithmetic unit of the computer, thereby increasing the effective speed of the computer.

The value of the generated information

AI: A + SchI

AI: A

AI: A

AI: SchK

 AI

  one

 PhI

Claims (2)

1. USSR author's certificate number 438014, cl. G 06 F 9/19, 1971. 2. The author's certificate C (CP 431516, class G 06 F 9/20, 1972.