KM1810VM89 - USSR Soviet Russian Gold Ceramic Clone Intel 8089 I/O Input-Output coprocessor for use with 8086/8088 CPU

Great item for chip collectors !!!
 
Rare USSR Soviet Russian I/O CPU - Gold Ceramic Clone of Intel 8089 Input/Output co-Processor.
It uses the same programming technique as 8087 for input-output operations,
such as transfer of data from memory to a peripheral device ans so reducing the load on the CPU
KM1810VM89 - Rare Russian Gold Ceramic clone (Kvazar plant, 1991) of enigmatic Intel 8089 I/O co-processor FPU.
This CPU is hard to find nowadays.

For more information, please visit - en.wikipedia.org/wiki/K1810VM86

Some history :
 
Microchips, included in the 1810 set, utilize both 16-bit and 8-bit capabilities and have many features 
that give additional flexibility to a computer system. 
1810 includes a universal central processor 1810VM86 , 
specialized input/output microchips and other chips that support multiprocessor configurations..

1810VM86 is a monocrystal 16-bit microprocessor with multiplexed 20-bit data bus, 
manufactured, as Intel 8086, in a 40-pin package. 
The processor needs 1,5 V power source. Again, having the same pinout it can be used in 8086 motherboards. 
Mnemonics and names of registers are absolutely identical in both processors. 
Machine code compatibility allows to run any 8086 programs.

In addition to 1810VM86, the series includes an 8-bit 1810VM88 microprocessor, analogical to 8088, 
arithmetical coprocessor 1810VM87 , analogical to 8087, 
and input/output coprocessor 1810VM89 , analogical to 8089. 
Almost any 8086/8088 computer system can be built from Soviet microchips. 
The series includes the following microchips:
1810GF84 — clock generator (8284 analog, 18 pins)
1810VG88 — system bus controller (8288 analog, 20 pins)
1810IR82/83 — latch registers (8282/8283 analogs, 20 pins)
1810VA86/87 — receivers/transmitters (8286/8287 analogs, 20 pins)
1810VI54 — programmable timer (8254 analog)
1810VT37 — programmable DMA controller (8237 analog, 40 pins)
1810VN59A — priority interrupt controller (8259 analog, 28 pins)
1810VG72/72A — floppy drive controller (8272/8272A analogs, 40 pins)
1810VB89 — system bus arbiter (8289 analog, 20 pins)
1810VT02/03 — dynamic memory controllers (8203 analog, 40 pins)

All of them are similar to Intel microchips, not only by purpose and architecture, but also by naming scheme. 
Most chips from 580 and 1810 sets can be used together.
 
KR1810 chips were used in many Russian personal computers like ES184x and ES14x (IBM PC compatible), 
Iskra-1030 , Neiron-I9 , Poisk , Agat P , and similar. 
There were localized operating systems for these computers — M86 (CP/M-86 compatible) and DOS-16 (MS-DOS compatible).

IC from the Old Stock, in working order.