Galaksija retrospective and some news

29.04.2017 8:59

This year my Galaksija replica is a decade old. Back in January 2007 I first brought to life enough of the circuit in my father's workshop to display some faint, mirrored characters on the TV screen. It has been the culmination of 6 intensive months of reverse engineering and documenting the original design, ironing out the odd corners and designing a compatible computer around it. In September that year I've successfully defended my diploma thesis on Galaksija at the Faculty of Electrical Engineering.

In the following five years, I've mostly focused on the software. With the help of the working replica, I've been able to document a large portion of its ROM. I found convincing clues that Galaksija's BASIC was derived from Tandy TRS-80, not Microsoft BASIC as it is commonly believed. I explored old software and wrote some new demos. Along the way I confirmed the myth that high-resolution graphics were possible on that hardware. Finally, I've summed up most of my work in the Ultimate Galaksija talk in front of fellow hackers at the 29C3.

Applebloom simulation on Galaksija at 29C3 retro-gaming assembly.

I can't believe it's been ten years already. It feels like I've written all those articles two life times ago. In the mean time, I've been employed in vastly different fields and I guess I shouldn't be surprised that a lot has faded from my memory. The Hamburg talk was certainly the crowning moment and after the pretty exhausting preparations for it, I hardly returned to anything Galaksija-related. My replica still works, but while I once knew by heart minute timing details of every signal, the circuit diagram now only stirs up general ideas behind its operation. Still, the &2BA8 register address for horizontal sync adjustment immediately popped up from muscle memory upon touching the keyboard.

Anyway, I promised some news. There will be a Mini Maker Faire in Ljubljana in two weeks. I've always been intrigued by reports from Maker Faires and on a couple of occasions I've been very close to going to the one in Brighton. However, each time something else intervened. Hence I immediately jumped to the opportunity to participate in the first Maker Faire in our country. Also, a few people encouraged me to put my Galaksija on display once again. So, if you would like to play some Inspektor Spiridon on real hardware, or puzzle over why your BASIC program results in the WHAT? response, find my table at the Poligon Creative Centre on 13 May.

Galaksija circuit board from Mr. Ivetić.

The other news is that I was recently contacted by Mr. Vojislav Ivetić. As a fan of old computers, he acquired an old, original Galaksija from one of his colleagues and was interested in the possibility of renovating it and bringing it back to life. The exact state of the board is unknown, but supposedly it is not in a working condition. From the first glance it appears to be a mostly complete article, built from one of the original kits, albeit with some crude home brew modifications. Inspired by the recent series on Xerox Alto restoration by Ken Shirriff, I offered to have a look and at least do a quick checkup and a list of things that would need to be done to get it working.

I'll post my first findings from a more detailed look at this Galaksija in another blog post here in the near future. I would love to restore this computer back to its former glory and document the process. But that really depends on how much time I'll be able to dedicate to it and how other things in my life turn out in the following months.

Posted by Tomaž | Categories: Life

Add a new comment


(No HTML tags allowed. Separate paragraphs with a blank line.)