Operating System Support Discs for Acorn Archimedes computers

Each set of disc is specific to that model and OS variant. Click on the Archive icon to fetch the zipped file, or the Disc icon for the ADF disc image file
Arthur
	The Welcome disc for the original 1987 Archimedes machines, running the Arthur operating system. The entry level A305 (512KB RAM) model and the A310 (1MB RAM) had no hard drive. The A440 had a 20MB unit. 'Second generation' systems, called A420/1 and A440/1, had 20MB and 40MB respectively.
RISC OS 2
	The main applications disc for RISC OS 2. Supplied with new machines from 1989, and as an upgrade to older units
	Games and other tools for RISC OS 2
	Patches and information on upgrading applications which ran under Arthur to RISC OS 2. A couple of the names might be familiar from other areas.
RISC OS 3.10
	The core disc-based tools for RISC OS 3.10, launched in 1992. Note that the main applications have moved into ROM
	As with RISC OS 2, more relaxed applications, plus the hard drive formatter.
	The third original disc, called the RISC OS Applications Upgrade Disc 1, has the Printer drivers on it. It needs RISC OS 3.1 and 2MB RAM
	Support for Floating Point.
	A redesigned icon and desktop furniture kit.
SmallUni.zip SmalUni2.zip	Universal Boot. This is the Last Release of the RISC OS 3 boot structure. I've chopped it into two bits, called SmallUni.zip and SmalUni2.zip, so it should fit on 1.44MB floppy. This ought to make transfer to older machines easier. The Licence and notes from RISCOS Ltd are also included Please read the caveat before proceeding

Original design by Michael Gilbert
using StrongEd, TextEase2000, InterGIF, ImageMaster and HTML3
Updated 2025 using Visual Studio on Windows 11, which was much less fun...