The PMI-80 was a single-board

microcomputer A microcomputer is a small, relatively inexpensive computer having a central processing unit (CPU) made out of a microprocessor. The computer also includes memory and input/output (I/O) circuitry together mounted on a printed circuit board (P ...

produced by

Tesla Tesla most commonly refers to: * Nikola Tesla (1856–1943), a Serbian-American electrical engineer and inventor * Tesla, Inc., an American electric vehicle and clean energy company, formerly Tesla Motors, Inc. * Tesla (unit) (symbol: T), the SI-d ...

Piešťany Piešťany (; , , , ) is a town in Slovakia. It is located in the western part of the country within the Trnava Region and is the seat of its Piešťany District, own district. It is the biggest and best known spa town in Slovakia and has around ...

Czechoslovakia Czechoslovakia ( ; Czech language, Czech and , ''Česko-Slovensko'') was a landlocked country in Central Europe, created in 1918, when it declared its independence from Austria-Hungary. In 1938, after the Munich Agreement, the Sudetenland beca ...

, since 1982. It was based on the MHB 8080A

CPU A central processing unit (CPU), also called a central processor, main processor, or just processor, is the primary processor in a given computer. Its electronic circuitry executes instructions of a computer program, such as arithmetic, log ...

(a Tesla clone of the

Intel 8080 The Intel 8080 is Intel's second 8-bit computing, 8-bit microprocessor. Introduced in April 1974, the 8080 was an enhanced successor to the earlier Intel 8008 microprocessor, although without binary compatibility.'' Electronic News'' was a week ...

), clocked at 1.111

MHz The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), often described as being equivalent to one event (or cycle) per second. The hertz is an SI derived unit whose formal expression in terms of SI base u ...

. Instead of a raster graphic display output and classical keyboard, it had a

calculator An electronic calculator is typically a portable electronic device used to perform calculations, ranging from basic arithmetic to complex mathematics. The first solid-state electronic calculator was created in the early 1960s. Pocket-si ...

-style nine-digit seven-segment red

LED A light-emitting diode (LED) is a semiconductor device that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons. The color of the light (corresp ...

display and a 25-key calculator-type keypad with

hexadecimal Hexadecimal (also known as base-16 or simply hex) is a Numeral system#Positional systems in detail, positional numeral system that represents numbers using a radix (base) of sixteen. Unlike the decimal system representing numbers using ten symbo ...

and function keys (including hardware REset and Interrupt). The PMI-80 had 1

KiB The byte is a unit of digital information that most commonly consists of eight bits. Historically, the byte was the number of bits used to encode a single character of text in a computer and for this reason it is the smallest addressable un ...

ROM Rom, or ROM may refer to: Biomechanics and medicine * Risk of mortality, a medical classification to estimate the likelihood of death for a patient * Rupture of membranes, a term used during pregnancy to describe a rupture of the amniotic sac * ...

(expandable to 2 KiB) and fixed 1

of RWM. Eight (expandable to 32) I/O lines were provided for user along with complete system bus. Connected could be e.g., a card with a DAC of 0–12 V range.

External links

PMI-80 information
– At the OLD-COMPUTERS.COM website Single-board computers Science and technology in Czechoslovakia {{microcompu-stub