SM 4-20

It was manufactured from 1982 to 1988 by ZVT Námestovo. The computer was inspired by or was successor to PDP 11/40 a SM 3-20. Hardware is based on 74181.Operating systems running on the computer: DIAMS,TMOS-2.

This topic contains doubts or inaccuracies that need to be corrected. More information follows below.

Parts of this topic may be machine translated.

SMEP-I series computer.

The UNIBUS bus, connected to the SMEP board format.

Processor Boards

• SM 4200
• (SH 74198, ROM, ..)
• SM 4210
• SM 4220
• (ALU Am29xx, ROM MCM7641PC/P556PT5)

Other boards

* SM 0203 - boot module (BootROM) - 1/3 SMEP format

Computer Usage

In scientific data processing

Ondrej Jančík, Vladimír Kapišovský and Jozef Beňa from the Research Institute of Nuclear Power Plants in Jaslovské Bohunice, at a conference in 1986, the authors presented graphic means for spectrometry based on the SM 4-20 computer. The goal of their work was to create tools for displaying and manipulating spectra that could be loaded into a computer from various sources. These sources included, for example, a remote spectrometer, a local spectrometer in the CAMAC system, any other spectrometric system, or storage media.

For this purpose, they used technical resources that included a CAMAC frame controlled by an NL 2106 unit, an MC-6-A-RGB color monitor and a CAM 3.10-11 monitor control unit. The displayed display system had a resolution of 256 x 512 pixels and supported 8 colors. The authors made it possible to display two histograms in either point or line form, as well as display text or semi-graphic information in a 32 x 64 character grid.

They ensured interaction with the operator through the CM 7202 console and planned to expand the possibility of control using a special functional keyboard. They implemented the entire software under the DOS RV-V2 operating system.

Inaccuracies/doubts related to the topic

YEARS OF PRODUCTION VERY UNCERTAIN - ADD.

Computers derived from SM 4-20

The following computers were inspired by or derived from SM 4-20:

• SM 53/10 (ZVT Námestovo)

References

• Marek, Miloš a kol. Obecný popis systému. 1. vyd. Praha: SNTL, 1978. 173, [1] s. Systém malých elektronických počítačů.
• Výuka V01. B, C: Systém pro automatizaci vyučovacího procesu formou testu na počítačích SM3-20 (SM4-20): Pokyny pro práci správce systému (examinátora), operátora a uživatele s programovou výukou. Ostrava: Dům techniky ČSVTS, 1983. 83 s. Aplikace počítačů Systému malých elektronických počítačů.
• Nohel, Jiří. Asembler: popis jazyka. 1. vyd. Praha: SNTL, 1978. 128 s. Systém malých elektronických počítačů.
• Attl, Vladimír. FOKAL: Popis jazyka. 1. vyd. Praha: SNTL, 1979. 89, [1] s. Systém malých elektronických počítačů. Operační systém FOBOS. Systém malých elektronických počítačů. Operační systém FOBOS.
• Marek, Miloš a kol. Obecný popis systému. 1. vyd. Praha: SNTL, 1978. 173, [1] s. Systém malých elektronických počítačů.
• https://www.root.cz/clanky/pdp-11-a-smep-system-malych-elektronickych-pocitacu/ (WebArchive)
• https://paveldf.net/minipocitac-sm-4-20/ (WebArchive)
• Sdělovací technika: měsíčník pro rozvoj a praxi sdělovací elektrotechniky. Praha: Státní nakladatelství technické literatury, 11.1985, 33(11), s. 404. ISSN 0036-9942. Dostupné také z: https://ndk.cz/uuid/uuid:e18ef7d0-6417-11ea-8048-5ef3fc9ae867
• https://inis.iaea.org/collection/NCLCollectionStore/_Public/17/086/17086227.pdf?r=1 (WebArchive)