On Thu, Oct 16, 2025 at 1:07 PM Johan Helsingius via cctalk < [email protected]> wrote:
> > Oh, and ARM originally stood for "Acorn RISC Machine", and was > developed by Acorn Computers for their Acorn Archimedes, running > RISC OS. > > There's a very good explanation of the history leading to the development of RISC OS at https://www.theregister.com/2022/06/23/how_risc_os_happened/ There was also RISCiX, a development of BSD 4.3 with some tricks to get around the large page size of the memory controller and small size of the hard disc. This was developed for Olivetti (then owner of Acorn) as a desktop publishing machine (the A680, contemporary with the A500 Paul mentions) but not released as far as I know. RISCiX appeared as the R140 (a rebranded A440) and later a RISCiX branding of the A540 (R280 ?) which ganged up to 4 MEMCs for 16MB of RAM.
