Phoebe RiscPC 2 - The New Acorn Workstation

The resultant design objectives were clearly outlined at the start:

• Harness full potential of StrongARM
• Build an architecture which can support several StrongARMs
• PCI support
• Update I/O to modern standard
• Achieve the best possible graphics performance
• Run existing RISC OS applications
• Enhance RISC OS functionality

An exciting new case, building on the good points of the existing design and including much more:

• 3 standard Acorn expansion slots
• 4 built-in PCI sockets
• 230W PSU
• No screws required to access
• Peripherals separate from main system

System architecture:

• 64 MHz bus performance
• 0.35 µm process
• Semaphore for multiprocessing
• Multiple DMA controllers
• Multiple Master Arbitration System
• A high speed I/O world and multiple bus mastering
• An improved VIDC20 for bigger and better screen modes
• Better standard audio support
• A new high speed EIDE interface for up to 4 drives
• A PCI bridge to provide industry standard expansion, whilst retaining the "podule" world for backwards compatibility