JPR-12

Also called SAPI, SAPI-12.Designed by Ing. Eduard Smutný,Tesla Elstroj.It was manufactured from 1976 by Tesle Strašnice. The computer was inspired by or was successor to Elbit-100.

Parts of this topic may be machine translated.

Contents
The JPR-12 is a SAPI file processing unit.

It was widely found at petrol pumps and the "predecessor of CCS" worked on them.

In 1969, he was employed at Tesla Elstroj (development), where his brother Tomáš Smutný contacted him to say that he had managed to obtain the Israeli minicomputer ELBIT-100. Eduard constructed the JPR-12 minicomputer based on it. A configurable kit called SAPI-12 was developed for the JPR-12 processor module, designed primarily to control technological processes or as a laboratory computer for measurement and data collection.

Technical description

The technical description of the SAPI file follows the technical conditions of the SAPI file TPTE 12-650/75. In this section there is only a general description, a detailed description of individual devices is in other parts. From the individual devices and parts of the SAPI file, a minicomputer system can be created, which is intended for data collection, sequential control, data transfer control and, in general, for such applications that need a programmable control unit without large demands on memory capacity. The system created from the SAPI file is based on programmable control units - the JPR 12 program control unit (minicomputer) and the JPR 8 program control unit (microcomputer).

The existence of two levels of control units with a uniform definition of connection circuits enables very flexible creation of systems according to the requirements of individual applications. Simple programming of the control units ensures the flexibility of the system construction also in terms of programming. In the SAPI file, medium-distance data transfer means are incorporated, which enable the system to work in applications where it is necessary to centrally manage or collect data from more distant workplaces. management and transmission of information.

The basic advantage of the SAPI file is its modularity, based on the use of parallel and serial connection, which allows many ways of connecting additional devices and control units.

The SAPI file consists of the following groups of parts that allow the system to be built:

Control units

Two types of control units are available in the SAPI system. The central control unit of the system is a JPR 12 minicomputer with a word length of 12 bits and a memory capacity of 4k words.

A detailed description of the JPR 12 is in the description 4XV 120 005. Another control unit is a JPR-8 microcomputer with a word length of 8 and 16 bits with a program memory capacity of 512 words of 16 bits and a data memory of 256 words of 8 bits. The JPR-8 program control unit allows you to connect additional devices via the same connection circuits as the JPR 12 unit. This allows you to choose the type of control unit according to the application requirements, with the same option of choosing additional devices. The JPR-8 microcomputer is especially suitable for such applications that require program control of several additional devices according to a fixed program, which is stored in the JPR-8 in a programmable ROM memory implemented on thin magnetic layers.

Link Units

The input/output devices are connected to the control units via connection boards. Link boards are placed in link units. The connection units are therefore used for easy connection of I/O devices to the JPR 12 and JPR 8.

There are several types of connection units.

JPN link unit

JPN converts the so-called standard JPR 12 connection into a universal connection, which both simplifies the connection circuit boards and at the same time expands the possibilities of the JPR 12 interrupt system. The universal connection also enables the selection of transmission rates for serial transmission. The universal connection unites the connection of the JPR 12 and JPR 8 units. The JPN connection unit has four variants that differ in the number of connection boards that can be connected to the connection unit.

They are:

JPN 4 3 connection boards
JPN 8 7 connection boards
JPN 12 11 connection boards
JPN 16 15 connection boards

JPU Link Unit 16

The JPU 16 is the same as the JPN 16, but because it connects to the JPR 8, which has a universal interconnect, it does not include the ZDP interconnect motherboard. The unit can accommodate 8 connection boards for I/O devices and 8 data transfer units.

If the JPR 8 unit works as a receiving unit, 11 JPD data transfer units, 11 PSN serial transfer link units and a PRK control unit link board can be placed in the JPR 8 - JPU 16 units

JPS link unit

The JPS is a unit through which the JPR 12 can be connected, for example, to devices for remote measurement and signaling DMS 40, DMS 80, DMS 16*

A PMS board, 1-10 VMS boards can be placed in the JPS unit, and the rest can be completed with boards connected for I/O devices. The JPS unit is the same as the JPN 16, but also includes wiring for the VMS and PMS boards.

Definition of standard and universal connection.

a/ Standard connection.

The standard connection is the unit connection system, JPR 12. The connection contains 8 address lines, 12 bidirectional data lines, 4 lines for reporting the interrupt request, 1 control line (channel pulse).

A detailed description of the standard connection of the JPR 12 unit is given in the technical conditions of the JPR 12 TPTE 12 - 639/74.

b/ Universal connection.

The JPR 12 unit has a standard connection, which is not suitable for modular connection of I/O devices. Therefore, the standard connection is converted to a universal connection. The universal connection includes the JPN, JPS connection unit and the JPR 8 control unit.

The universal connection includes:

12 unidirectional output data lines OUT 0 - OUT 11

12 unidirectional input data lines VST 0 - VST 11

8 address lines in positive logic X4-X1, Y4-Y1

8 address lines in negative logic /X4-/X1, /Y4-/Y1

3 control lines (KI, IS, PS)

6 frequency distribution lines

Part of the universal connection is the interruption system and the distribution of supply voltages.

List of Related Documentation

Computers derived from JPR-12

The following computers were inspired by or derived from JPR-12:

References

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