Hardware
CPU: KM1801VM2 @ 8 MHz
Peripheral processor: KM1801VM2 @ 6 MHz (in newer models; or 4 MHz in early models, according to documentation)
CPU RAM: 64 KB
PPU RAM: 32 KB, ROM: 32 KB, video RAM: 96 KB (3 planes 32KB each, each 3-bit pixel had a bit in each plane)
Keyboard: 88 keys
built-in LAN controller
built-in controller for special tape-recorder with computer control (to use for data storage, usually 5-inch FDD’s were used)
An interesting part of the design is the usage of a peripheral processing unit (PPU). UKNC did not have full-featured controllers for display, LAN, keyboard, clock, in-hardware debugger etc. Instead, the PPU configured peripheral devices and managed their events. In other words, the PPU simulated all the controllers.
The computer was released in 3 sub-models: 0511, 0511.1, 0511.2. The 0511.1 model, intended for home use, had a power supply for 220V AC, while others utilized 42V AC. The 0511.2 featured new firmware with extended functionality and changed the marking of the keyboard’s gray keys, compared to the initial version. The photo shows an 0511.2 variant.
There was no active cooling, and at least the 0511.2 variant tended to overheat and halt after several hours of operation.
The case and keyboard (with changed markings) were re-used to produce an IBM PC clone, though less well-known than the once famous Poisk computer.
Software
Operating system: RAFOS, FODOS (RT-11 clones) or RT-11SJ/FB
LAN control program
Programming languages:
BASIC (Vilnius BASIC)
Fortran
Pascal
Modula-2
C
Assembler
Rapira
E-practicum
Logo
Prolog
Forth
FOCAL
See also
Elektronika BK-0010
SM EVM
DVK
External links
UKNC emulator project; contains RT-11 images
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List of Soviet computer systems
A Agat Aragats Argon ATM Turbo BESM Besta Dnepr Dubna 48K Elbrus UKNC DVK Elektronika BK Elektronika 60 Electronika 85 Electronika SS BIS Electronica MC 1502 Electronica MC 1504 ES EVM ES PEVM GVS-100 Hobbit Iskra Irisha Kiev KVM-1 Korvet M-1 M MESM Micro-80 Microsha Minsk Mir Nairi Orion-128 Pentagon Poisk Promin PS-2000, PS-3000 Razdan Radon Radio-86RK Scorpion Setun SM EVM Sneg Specialist Strela SVS TsUM-1 UM Ural Vector-06C Vesna
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Categories: Soviet computer systems | Microcomputers | Computing in the Soviet Union | PDP-11 | Computer hardware stubsHidden categories: Articles containing Russian language text

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