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K1810VM86

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Jan 8, 2022

The K1810VM86 (Russian: К1810ВМ86)[1][2] is a Soviet 16-bit microprocessor, a clone of the Intel8086CPU with which it is binary and pin compatible. It was developed between 1982 and 1985.[3] The original K1810VM86 supported a clock frequency of up to 5 MHz while up to 8 MHz were allowed for the later K1810VM86M (К1810ВМ86M; corresponding to Intel 8086-2).[3] The K1810VM86 was manufactured plastic 40-pin dual in-line package (as KR1810VM86 / КР1810ВМ86) or in a 40-pin ceramic dual in-line package (as KM1810VM86 / КМ1810ВМ86 for the commercial version or M1810VM86 / М1810ВМ86 for the military version). A clone of the related Intel 8088 with its 8-bit bus was manufactured as the K1810VM88 (Russian: К1810ВМ88), also in plastic and ceramic packages.

K1810VM86
Performance
Max. CPUclock rate 2 MHz to 5 MHz
Architecture and classification
Instruction set x86-16
Physical specifications
Package(s)
History
Predecessor KR580VM80A

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M1810VM86, military version in a ceramic package
KR1810VM86M, equivalent to Intel 8086-2 (8 MHz clock)
KR1810VM88, equivalent to Intel 8088, plastic package
KM1810VM88, equivalent to Intel 8088, ceramic package

The K1810VM86 was manufactured with an n-MOS process.

The family consists of the following chips:[4][3]

Designation Western equivalent Description
Russian English
КР1810ВМ86 KR1810VM86 Intel 8086 central processing unit, 16-bit bus
КМ1810ВМ87 KM1810VM87 Intel 8087 floating-point coprocessor
КР1810ВМ88 KR1810VM88 Intel 8088 central processing unit, 8-bit bus
КР1810ВМ89 KR1810VM89 Intel 8089 input/output coprocessor
КР1810ВТ2 KR1810VT2 Intel 8202 DRAM controller, 16KB
КР1810ВТ3 KR1810VT3 Intel 8203 DRAM controller, 64KB
КР1810ВТ37 KR1810VT37 Intel 8237 DMA controller
КР1810ВИ54 KR1810VI54 Intel 8254 programmable interval timer
КР1810ВК56 KR1810VK56 Intel 8256AH multifunction universal asynchronous receiver/transmitter
КР1810ВТ57А KR1810VT57A Intel 8257 programmable DMA controller
КР1810ВН59А KR1810VN59A Intel 8259A programmable interrupt controller
КР1810ВГ72А KR1810VG72A Intel 8272A floppy-disk controller
КР1810ГФ84 KR1810GF84 Intel 8284 system clock generator/driver
КР1810ВГ88 KR1810VG88 Intel 8288 bus controller
КР1810ВБ89 KR1810VB89 Intel 8289 Bus arbiter

For brevity, the table above lists only the chip variants in a plastic DIP (prefix КР). Not listed separately are variants in a ceramic DIP (prefix КМ for commercial version and prefix М for the military version).

Additionally, many devices in the K580 series could be used for the K1810 series as well.

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