K 1520 microcomputer system
The robotron K 1520 microcomputer system was developed and produced around 1978 in the VEB Kombinat Robotron (as the successor to the robotron K 1510 ). It is an open microcomputer module system based on the 8-bit microprocessor system U880 and was installed by users as an OEM module system from GDR companies in various ways in end devices, especially in automation technology and within special workstation computers (e.g. in the A 5120 ).
Hardware components of the microcomputer module system
The core of the microcomputer system is the universal microcomputer bus K 1520 . It was standardized in the TGL 37271/01 and allowed each user to develop their own modules and to combine them with any existing modules:
The so-called plug-in units ( printed circuit boards with a size of 215 mm × 170 mm) implement various modules of a microcomputer. On the “bus side” they have two 58-pin indirect connectors with which they can be used for e.g. B. in a so-called. Plug-in unit insert (120 or 240 mm wide). This has a back wiring board that distributes the system bus and the so-called "coupling bus". On the handle side there can be up to three 39-pin plug connectors for connecting peripheral devices (which in principle do not belong to the K 1520 system).
The basic functional units provided were
- Central processing unit ZRE K 2521… K 2524 ( CPU , CTC , PIO , 3K EPROM , 1K sRAM )
- Semiconductor memory OPS K 3520 (4K sRAM), OFS K 3620 (2K sRAM, 6K EPROM), PFS K 3820 (16K EPROM)
- Control unit BDE K 7622
- Connection control operating unit ABD K 7022
- Connection controls with standard interface daro 1000/1 ADA K 6020 (2 output, 1 input channel), K 6021 (1 output, 2 input channels)
- Bus amplifier BVE K 4120 (for "bus extension" up to 2.5 m)
- Plug-in unit insert STS K 0120, K 0121
- Power supply modules STM (from system K 1510)
Somewhat delayed followed
- Connection control membrane storage AFS K5121
- Connection control V 24 ASV K 8021
and many more.
Software development and software components
Cross software
For the development of user-specific software, preparation, translation and test programs were available for the host computer of the ESER , for the R 4000 process computer and for the KRS 4200 small computer system.
Microcomputer development system MRES 20
The MRES 20 itself was based on the K 1520 and had its own operating system with the MEOS 20 . It contained all of the hardware and software components required for software development, in particular a module for EPROM programming.
Basic real-time control system
This real-time operating system was provided in a variant for internal storage (BESI) and a variant for external storage (BESE).
Examples of ready-made systems based on the K 1520
- A 5120 : Office computer for text and data processing from the VEB booking machine plant in Karl-Marx-Stadt
- K 8915: An independent 8-bit PC, which was built from components of the K1520 system and supplemented by a 5.25 ″ double floppy disk drive . It was mainly used with the KOBRA operating system.
literature
- System description of the robotron K 1520 microcomputer system, Part I, October 1978
- Operating documentation for microcomputer K 1520 from VEB Robotron-Elektronik Zella-Mehlis
- Department standard line interface K 1520, TGL 37271/01 , July 1980
- Ludwig Claßen: Programming of the microprocessor system U 880-K 1520 . Verlag Technik, Berlin 1983.
Web links
- robotrontechnik.de . Retrieved April 24, 2014.
Individual evidence
- ↑ http://www.robotrontechnik.de/index.htm?/html/computer/k8915.htm Retrieved on October 4, 2014.