Acorn Risc PC 600

In April 1994 Acorn launched the Risc PC 600 (sse the press release Acorn Computers Launches the Risc PC Range), their first major hardware change since the launch of the A540 and the ARM3 CPU in 1990. The Risc PC 600 had a 30MHz ARM610 CPU and a new version of RISC OS (3.50) to support the new hardware (See the technical overview). The support chips, VIDC, MEMC and IOC ,were upgraded to the VIDC20 and IOMD. maximum memory was increased from 16MB on the A540 (with an MEMC for every 4 MB) to a maximum 256MB using DRAM SIMMs and optionally 1 or 2 MB of video memory (VRAM) could be installed. The Risc PC 600, for the first time, used a standard PC AT keyboard, but kept the proprietary Acorn 3 button mouse. Sound support was 8 channel, 8 bit. The basic Risc PC could support 2 podule cards and had a separate network interface for either Econet or Ethernet.