KR580VM80A

'KR580VM80A' (Russian: КР580ВМ80А) was a Soviet microprocessor, clone of Intel 8080 CPU. Different versions of this CPU were manufactured since the late 1970's, the earliest known use is in SM1800 computer in 1979. The production ceased with the fall of USSR. Initially called K580IK80 (К580ИК80) it was produced in a 44-pin planar metal-ceramic (climatic) package. Later, a generic consumer version in PDIP-40 package was produced and was called KR580IK80A (КР580ИК80А). The pin layout of the latter completely matched that of Intel's 8080A CPU. In 1986 this CPU received a new part number to conform with the new system and became known as KR580VM80A (КР580ВМ80А), the number it is most widely known by. Normal clock frequency for K580IK80A was 2MHz, up to 2.5MHz for KR580VM80A.

Contents

Applications

Technology and support chips

See also

Bibliography

External References

Applications

KR580VM80A was popular in home computers, computer terminals, industrial controllers. Some of the examples of its successful application are:

★ KUVT Korvet educational computer

★ Radio-86RK popular homebrew computer

★ SM 1800 industrial mini computer

★ Vector-06C home computer, where KR580VM80A is overclocked to 3MHz by design

★ TIA-MC-1 (ТИА-МЦ-1) arcade machine

Technology and support chips

'K580' family was manufactured with n-MOS process. Pins are electrically compatible with TTL logic levels. Load capacity of each output pin is sufficient for one TTL input. Output capacitance of each control and data pins is ≤ 100pF each.
The family consists of the following essential chips:

★ 'KR580VM80A' (KR580IK80A): central processing unit

★ 'KR580IK51': programmable serial interface/communication controller

★ 'KR580VI53': programmable interval timer, Intel 8253 clone

★ 'KR580VV55': programmable parallel interface

★ 'KR580VT57': programmable DMA controller

★ 'KR580VN59': programmable interrupt controller, Intel 8259 clone
The following chips can be used to enchance system efficiency:

★ 'KR580VG28', 'KR580VG38': bus controllers/drivers

★ 'KR580VV79': programmable peripheral device, keyboard and display controller

★ 'KR580VG75': programmable CRT video display controller

★ 'KR580IR82', 'KR580IR83' buffer registers; KR580VA86, KR580VA87 bus drivers

★ 'KR580GF24': clock generator/driver

See also

★ Intel 8080

★ MCS-85 Family

★ Z80

★ List of Soviet computer systems

Bibliography

Микропроцессоры и микроЭВМ в системах автоматического управления, , Sergey, Khvosch, Mashinostroenie, Leningradskoe otd-nie, 1987,

External References

★ CPU World page about KR580VM80A and support chips