Also called MVS 80,CM 1625,CM 1625.1601.It was manufactured from 1982 to 1988 by ZVT B.Bystrica.
The computer was inspired by or was successor to iSBC 80. Hardware is based on MHB8080A.Operating systems running on the computer: MIKROS,DOS MVS,LOS MVS.
Base system from the family of 8 and 16 bit SMEP series II modular microcomputers with the I-41 bus in Czechoslovakia. The basis of the system was developed at the Research Institute of Computer Technology in Žilina in 1980 and was supplied from ZVT Banská Bystrica from 1982 either as a kit of fitted and revived module boards in the format of 2/3 SMEP boards, or as a cassette with built-in power supplies and ventilation for 8 standard 2/3 SMEP boards with connectors and branched I-41 bus with mounted boards, or in a 19" rack with built-in power supplies and ventilation, which could be built into 19" SMEP racks, or other standard 19" racks according to IEEE for electronic devices.
The system was gradually developed and supplemented in the following years. The SM 50/40-1 microcomputer system is designed especially for machine control. devices and equipment, in the form of a terminal station for collecting and pre-processing information and in the form of a MVS 80 Microcomputer Development System for application development.
The CM 1601 terminal connected to the system
Made 128 pcs
The processor board is designated SM 2138. The single-board microcomputer SM 50/40-1 contains a basic 8080 microprocessor, I-41 bus control in an 8-bit version and an 8-level interrupt system that allows addressing of the operating memory up to 64 KB. It also contains a built-in RAM with a capacity of 2 KB and 4 KB EPROM, one IRPS or S2 serial transmission channel, 48 TTL input-output lines, for example to realize 4 parallel IRPR input-output channels, and a timer.
It uses a dual-board FDD controller based on the MH3000 architecture.
The development system MVS 80 was produced in two versions.
In both cases, the design of the terminal station was based on a built-in cartridge for 8 standard 2/3 SMEP boards. In addition to the boards of the CM 1601 video terminal, the processor boards, 64 KB memory, RJ external memory on a flexible disk or the control boards of the non-standard PZ emulator MVE 80 and PGM 08 type PROM/EPROM memory programmer control board.
The MVS 80-I development system ran under the LOS MVS 80 punched tape operating system.
The MVS 80-II development system worked under the DOS MVS 80 disk operating system, which also supported the work and the PGM 08 PROM/EPROM memory programmer. Macro assembler and BASIC translators were also available, for DOS MVS 80 also PL/M 80, FORTRAN 80 and PASCAL 80