Dragon System Architecture June 1988 1 DRAGON System Architecture I Motivations II The DynaBus III VLSI Chip Set IV Transfert of Research I. Motivations Foundations for building architectures for a wide range of document processing machines controllers : Network, Scanners... servers : Data base servers, Printers, Gateway workstations : mid, high & very high end => high data bandwidth & processing Parallel processing architecture research Project started in 81 Follows a first generation of shared memory multiprocessor on conventional Bus. Currently implemented in a Xerox product. new generation using more advanced concepts & technology : VLSI, packaging Compatible with Operating systems like Mach or SunOS phase3 & languages like Cedar, Ada Dragon Technology Communications studies : VLSI BUS VLSI Chip Set Packaging APPLICATIONS Applications & markets High end parallel computer Desk-Top multiprocessor High end Workstations High end Printers servers File and Data-bases servers Add-in boards in standards platform Industrial control OEM multiprocessors Chips set & packaging II. The DynaBus Very simple model for the programmer of a multiprocessor All processors think they shared a unique memory. Transparent Caches near each processor avoid bottleneck. Implementation : VLSI BUS Multi-level Busses Well fitted for VLSI 64 bits Multiprocessors Hardware data consistency Split-cycle for very high speed Support multi-Bank of memory Mathematical model and proof of coherence Bridges with industrial standards busses Extension to non busses communication Bandwidth from 200 MByte/sec to 1GByte/sec III. VLSI Chips set Only seven Chips for all the family Standard Cell Chips, mid performance technology BIC : Bus interface Chip Arbiter : distributed arbiter Memory Controller : High performance with ECC IOB : Input-Output Bridge Display/Printer Chip : programmable Map Cache : for virtual memory Full Custom Chip, high performance technology Cache : connects the processor IV Transfert of Research Partnership first with one or more Semiconductor companies : National, AMD, Motorola, Cypress... good chances because open architecture compatible with industrial standards : any microprocessor, any add-in boards & multi- operating system... and with Equipment maker companies like : SUN, ATT... good chances because the performances [Artwork node; type 'Artwork on' to command tool] [Artwork node; type 'Artwork on' to command tool] [Artwork node; type 'Artwork on' to command tool] A#PressFonts 1000.0 firstVisibleFolio"slides" styleIunleadedMark insideFooterdisK outsideFooter Iblocke"XeroxLogotypes" 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