SU660052A1 - Digital unit checking arrangement - Google Patents

Description

Coordinate unit 1 contains contactless keys, a zero-coded x and xed plate with which a set of commands, information bytes and control unit 2 are started.

The information bytes are at the output 7 of the coordinate block 1 that forms the sensor when the probe is shifted across the surface of the encoded floor of the tablet, and at the output 8 when the buttons of the coordinate block 1 are pressed.

At the output 9 of the coordinate block 1, constant signals are formed - signs of operating modes. Modes of operation are set with the help of a chip or the non-contact buttons of block 1. At the output 10 of the coordinate block of the 1 form: clock pulses and single control pulses are operated.

The output byte of block 2 of the unravleia is formed by the service bytes, and at output 12 of the control signals for switching information that is connected to the inputs of switch 4.

The output 13 of block 2 produces trigger signals for the exchange control unit 3. At the output 14 of the unit 3, control signals are generated, which are fed to the conjugation unit 6, and at the output 15, the signals acting on the control unit 2 are formed. From output 16 of block 6 of the interface, information and control signals are received to the external device.

The input 17 of the interface 6 receives information and control signals from the peripheral device. From output 18 of block 6 of the monitor, the received information is sent to block 5 of coping and block 2 of control for indication. From output 19 of unit 6 mates, identification signals from an external device and other control signals are received in exchange control unit 3.

Peripheral Device Controls Mostly use the commands "Manage," Write and "Read." These commands are executed in several modes. All rarely changing overhead byte codes, for example, the address codes of the external command device, the start and end addresses of RAM memory cells, and the control cyiMMbi are generated by control unit 2. But the management command transfers the start and end addresses of the peripheral memory cells. But to the command "Load after transmitting two service bytes (addresses and commands) information bytes are transferred to the external device. But the command “Read after transmitting two overhead bytes (addresses and commands) to the support unit receives information bytes from the peripheral device.

All service and information bytes are accompanied by appropriate identification signals.

To quickly check the peripheral's memory, use the write but all the memory addresses of any two alternating codes and then read them back. In this case, one of the codes is formed at the output 7 of the coordinate block with the help of a probe, and the other at the output 8 with the help of buttons. The position of the probe when transmitting the commands “Write,

and then "Read is saved. When receiving a command using the command "Read in block 5 of comparison, the comparison of the actual information with the information at the outputs 7, 8 of the coordinate block occurs. Signal

at the output of the comparison unit 5 acts on the control unit 2. The result of the comparison is displayed on a visual signaling device, not shown in the diagram.

For peripheral device checking

The “Record and“ Count, executable in step mode ”commands are also used. The speed of transmission of these commands in the stepping mode depends on the speed of manual movement of the probe in the coordinate field

tablet block 1.

Within the same square in which the symbol is depicted, only one pulse is sent to the control unit 2. If the probe is not displaced, for example, along a line consisting of 32 squares, 32 trigger pulses will be sent from the output 10 of the coordinated unit 1 to the control unit 2. To check the information recorded in the operative memory of the peripheral device, it is necessary with the command “Read the probe along the same line with 32 squares. During this time, a comparison of unnumbered () I1-1 th bytes will occur 32 times.

The device allows not to emit two commands “Manage and“ Write or “Manage and“ Read. The resumption of the transmission of these commands occurs automatically, regardless of the result of the exchange, and it is possible to change the codes of the transmitted bytes by moving the loop by the coordinate field of block 1.

Introduction to the described device of a coordinate input block of information associated with the control block, and through a switch with a comparison block, significantly simplifies the device, increases its reliability and increases the number of operating modes without the use of sophisticated software.

Claims (2)

1. USSR author's certificate Luo 508785, cl. G 06F 11/04, 1972. 2.Sergeev B. G. Device control and automatic troubleshooting of logic circuits. Collection "Diagnostics of computer malfunctions, A1 .." Science, 1965, p. 115-132.