Legacy OSes Archive

Introducing Darkstar: a Xerox Star emulator

Given its history and relationship to the Alto, the Star seemed appropriate for my next emulation project. (You can find the Alto emulator, ContrAlto, here). As with the Alto a substantial amount of detailed hardware documentation had been preserved and archived, making it possible to learn about the machine’s inner workings… Except in a few rather important places. Fortunately, Al Kossow at Bitsavers was able to provide extra documentation that filled in most of the holes. Cross-referencing all of this with the available schematics, it looked like there was enough information to make the project possible. This is an amazing project, and the article provides a lot of details about the process of writing the emulator. I’m definitely going to try this out this week to see if I can get it running. I’ve never used the Star, and that’s likely never going to change – they’re rare, expensive, and in museums – so this is the next best thing. I think most of us owe it to ourselves to try this out.

EmuTOS: a Free operating system for Atari computers

EmuTOS is designed to run on traditional Atari hardware (ST, TT, Falcon, based on Motorola 68000  or ColdFire microprocessors) and their emulators. It features functionality similar to TOS, which powered the Atari ST and its successors between 1985 and 1994. EmuTOS can run on real hardware, either as ROM replacement or from floppy, or on any Atari emulator such as ARAnyM, Hatari, or Steem SSE. EmuTOS is Free Software, and can run legacy third-party software on emulators without requiring copyrighted Atari ROMs, thereby avoiding legal issues.