About

My name is Jonathan Halliday. I was born in 1972 in the North East of England, where I have lived all my life. I’ve been interested in computing ever since I got my first Atari 65XE back in 1987. In the 1990s, I wrote many programs for the Atari XL/XE range of computers, mostly in C and assembly language. Although I sent some of the software to magazines in the hope they would be published, most of my programs were primarily for personal use and were put in storage when I packed my Atari equipment away in 2001. It wasn’t until 2008 that a nostalgic discussion with a friend about 6502 programming inspired me to dust off the Atari, install an emulator on the PC, and share some of my almost forgotten programs on the Internet.

After resurrecting my old software and finding it well received by the Atari 8-bit community, I rediscovered my interest in 6502 programming. I redesigned my word processor “The Last Word”, before becoming involved in hard disk drivers, partitioning software, and flash tool development for several new hardware upgrades. I simultaneously developed an interest in hardware, and in the wake of well documented work undertaken on my own vintage machines, I have been lucky enough to be asked to perform upgrade installation, modification and maintenance work on Atari computers belonging to enthusiasts from the UK, Europe and the United States.

Most recently a long running project to create a pre-emptively multi-tasking, Unix-like graphical operating system on the 8-bit Atari has passed significant milestones, and in 2015/2016 I developed completely rewritten firmware for the Ultimate 1MB and Incognito upgrades.

The Software

Aside from the SpartaDOS X ROMs (by DLT) and the original Ultimate 1MB/Incognito BIOS/XEX loader (by Candle), I am the author of all the software hosted on this site. The software is Donationware, so if you enjoy using it, please consider making a donation to support continued development and website upkeep.

The software and documentation hosted on this site must not be distributed in a modified or reverse-engineered form. In addition, please do not host said material on another server without first seeking my permission. If you wish to link to downloads, please link to the originating page, not directly to the download link, since while the links may change or even vanish, page URLs should not. If you link to a page and discover a dead link, please let me know.

I’d be pleased to hear any comments, criticisms or suggestions about any of the software featured on this site. If you want to get in touch, email me here.