Orao – building a 80’s Yugoslavian educational computer #VintageComputing #Arduino @mejs


Vlado Vince documents a 16 month arc building a clone of the 1984 Yugoslavian 6502-based Orao computer.

Orao… was developed around the 6502 CPU by Miroslav Kocijan for PEL Varaždin in 1984. It was designed (and priced!) for use in schools. It was common in elementary schools, mostly in Croatia, through the late 80s. It wasn’t really common as a home computer. It was pretty expensive, and since it was mainly used in education there wasn’t a lot of software for it.

I’m building an “Orao 2007” clone designed by Josip Perušanec who kindly shared the board files which I used to make mine.

An extensive Twitter thread documents building the Orao, issues with the board file/PCB, parts substitutions, and composite video output.

Vlado also needed to develop a keyboard and interface as the original used a proprietary keyboard and interface. An Arduino was used for key decoding a PS/2 keyboard.

The thread is a fascinating read about history, electronics, and debugging.

Read more on Twitter here.


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