Sourcing a replacement iPaq 3600-series battery

A few months ago I got a Compaq iPaq H3650, the same model that I had almost twenty years ago. This device left a strong impression on me, so even though I had (unfortunately) long ago gotten rid of my original one with a broken screen, I wanted to remember what these strange proto-smartphone devices were like. I got an iPaq on eBay for $10 (Pocket PCs are apparently not

Designing custom characters for the Galaksija

Galaksija computer stores its characters in a separate 2716 Character generator ROM. While these characters are fixed in the ROM, you can easily design new characters and burn them onto your EPROM. This article will cover how the Galaksija characters are programmed and where to find them in the character generator ROM. Each character is 16 bytes, or 8 columns by 16 rows: Each character consists of 16 bytes which

Yugoslav IEVT TY key switches – SMK style switches in disguise

Back in 2020 I built my first Galaksija computer, using the original single board design. Building this computer was quite a challenge for me, as I was pretty inexperienced with electronics. But the most difficult challenge was finding compatible key switches — so difficult actually, that it took me almost 3 years to find the right ones. This short article describes this journey, as well as a brief history of