Both the A3000 and the A5000 ran RISC OS 3. It used the new ARM3 processor while the A3000 had the older ARM2. The A5000 had a two part case, but a different design to the earlier models. It seems unlikely that the less expensive 3000 style case would be able to save any real amount of money given that the 400 continued to be produced. Oddly the 400 series continued on after switching a few options. It also eliminated one of the slots, there simply wasn't room for it. This makes them harder to place on a desk because the monitor cannot be put on top. Unlike the 300, the 3000's were mounted in single-part cases with the keyboard attached to the main unit. This seemed like a good time to introduce a number of new machines as well, and the 300 series was replaced with the new A3000 series in May, 1989.
ACORN ARCHIMEDES MOVIE
Work began on an upgrade to the Arthur OS as Arthur 2, but with the release of the Hollywood movie of the same name the OS was renamed to RISC OS 2.
R225 - 4 MB RAM, RISCiX UNIX network computer.R260 - 8 MB RAM, 100 MB hard disk, RISCiX UNIX workstation.R140 - 4 MB RAM, 52 MB hard disk, RISCiX UNIX workstation.(A680 and M4 - 8 MB RAM, RISCiX development machines, never sold).(A4xx/1 editions with improved memory controller).(A500 - 4 MB RAM, Archimedes development machine, never sold ).The 300 and 400 were followed by a number of machines with minor changes and upgrades: Both models included the Arthur OS (later versions to be called RISC OS, see below), BBC BASIC and an emulator for Acorn's earlier BBC Micro, and were mounted in excellent two-part cases with a small central unit, monitor on top, and a separate keyboard and three-button mouse.įour models were initially released with different amounts of memory, the A305, A310, A410 and A440. The machines differed primarily in that the 400 series included more slots (four instead of two) and a ST506 controller for an internal hard drive. The first models were released in June 1987, as the 300 and 400 series.