Dave Tuttle

I am a Wikipedia newbie and will likely remain so. The customs and infrastructure are complicated to the point of bafflement...

Not-so-Brief Bio

• Forever a computer nerd, programming and building things since 1965.
• Born in New York, attended MIT in the later 1960s.
• First professional job at the IBM Cambridge Scientific Center in 1968.
• Played a hands-on role in CP/CMS, VM/370, IBM SNA, DECnet Phase II, Telenet X.25, OSI, and quite a few other interesting areas.
• Coincidental co-inventor on U.S. Patent 7,127,506
• 40+ years and counting as a development engineer:
  • MIT Computation Center
  • IBM Cambridge Scientific Center
  • IBM VM/370 Development
  • Digital Equipment Corp. / DEC
  • Cambridge Telecommunications (CTX)
  • GTE Telenet Communications (purchased CTX)
  • Prime Computer
  • Ungermann-Bass (of Tandem Computers)
  • Augment Systems
  • VideoServer Connections (of VideoServer)
  • Northstar Internetworking (of Teradyne)
  • Hammer Technologies (of Teradyne)
  • Exotec -> Vividon
  • StarBak Communications (merged with Vividon)
  • Katana Technology (aka Virtual Iron Software)
  • Crossbeam Systems
  • SafeNet
  • Symmetric Computing
  • VideoIQ
  • Affirmed Networks
  • Avigilon

• Personal experience with a fun variety of machines and systems:
  • School days --
    • IBM 1620 (decimal arithmetic, variable word length)
    • IBM M44/44X (experimental virtual memory system, on IBM 7044)
    • MIT CTSS Compatible Time Sharing System
    • '21' terminal game on CTSS, written in MAD (Michigan Algorithm Decoder)
    • IBM OS/360-PCP, starting with Release 4/5 (1967)
    • IBM ASP/360 Attached Support Processor
    • IBM 2250 Model 1 (channel-attached vector display, 1024x1024)
    • SpaceWar on IBM System/360-65 with IBM 2250 ('ported' from TX-0, not by me)
    • IBM System/360 Model 65 with IBM 7094 emulator in microcode
  • IBM adventures --
    • IBM System/360 Model 67 with Dynamic Address Translation
    • IBM CP-67/CMS
    • IBM 1130 with IBM 2250 Model 4
    • SketchPad III interactive 3D drawing with sprites
    • IBM 2701, 2702, 2703 Communications Control Units
    • Brown University Hypertext Editing System
    • IBM 1050, 1052, 2741, 2780, 3270, 3780 terminals
    • IBM Virtual Machine Facility/370, System/370 Advanced Function
    • PER Program Event Recording, Virtual EC Mode, VMA microcode
    • IBM 3704/3705 Programmable Communications Control Unit (PCCU)
    • IBM 3704/5 Emulator Program (EP), Network Control Program (NCP), Partitioned Emulator Program (PEP)
    • IBM Systems Network Architecture (SNA)
  • DEC, working in 'The Mill' --
    • Digital Equipment Corp. PDP-11/04, PDP-11/70
    • Adventure game ("Twisty Little Passages, all alike") on TOPS-10
    • DEC VT52 & VT62 terminals; DMC11, DR11, DU11 communication adapters
    • Digital Equipment Corp. RSX-11M, RSX-11D, DECnet
    • Digital Equipment Corp. RSX-11M/3790 SNA Protocol Emulator
  • CTX -> GTE Telenet --
    • Datanetwork Modified Emulator Program (DMEP), X.25 for IBM 3704/5
    • CCITT/ITU X.25, X.3, X.21, X.22, X.121
    • CP/M on Zilog Z80A, MP/M, Zilog Z8000, Motorola 6502
    • Telemail(sm) worldwide electronic mail (1980), X.400
    • 3270DSP and HPAD transport protocols for X.25
    • Telenet, Tymnet, Datapac, Memorex, Amdahl, Magnuson, and more
    • Apple Lisa, rare sighting in Virginia HQ
  • Prime Computer --
    • Prime Computer 50-series, PrimeNet
    • Apple Macintosh 512, MacDraw, PowerPoint, PostScript
    • TCP/IP & Friends, ISO Open Systems Interconnect
    • AT&T UNIX System V, Multibus-II, RAID on SCSI
    • EMACSmail multiple-service mail client in Lisp-like PEEL
    • Corporation for Open Systems (COS) - OSI, MAP, TOP
    • Novell NetWare NCP (Network Control Protocol)
  • Ungermann-Bass --
    • Ethernet and "Structured Wiring", 10Broad36, 10Base5, 10Base2
    • 10BaseT and the Synoptics - Cabletron - Ungermann-Bass triad
    • IBM Token Ring, FDDI, Fibre Channel, ATM, LightStream
    • Access/Open managed services platform ("blade server" in 1992)
    • IBM PC-DOS vs Microsoft MS-DOS, IBM OS/2
    • Virtual Network Architecture (VNA)
  • Augment Systems --
    • Novell NetWare again, MS-Windows, Windows/NT
    • Augment AFX-410, FibreChannel network attached storage (RAID 3)
    • Macintosh Quadra, MacOS 7.5, MacOS 8.0, PowerMac, Mac compatibles
    • MacOS & WindowsNT foreign file system for high-speed SAN access
  • VideoServer Connections --
    • ISA & PCI plug-in cards for multi-channel ISDN, ISA PnP
    • MVIP, H.100, H.110 'ribbon cable bus' for PC telephony, video
    • Teletek H.320 video endpoints over bonded ISDN channels @ 384 Kbps
  • Northstar Internetworking --
    • Desktop Linux with Windows NT under VMware 1.0
    • RedHat Linux 5.2, 6.x in CompactPCI chassis
    • Ariel T1/E1 boards with 24 modems @ 56 Kb
    • Northstar IDU with Midnight Networks protocol stack
  • Hammer Technologies --
    • VxWorks on PowerPC in CompactPCI chassis
    • C-Port C-5 microcoded network processor, custom CPCI board
    • 'Next Generation Network' simulator / emulator at OC-48
  • Exotec -> Vividon --
    • MIT ExoKernel, ExOS with OpenBSD binary compatibility
    • Custom file system (CFFS+) for streaming media delivery
    • High-performance GbE and SCSI drivers, custom kernel map
    • RedHat Linux 7.x, 8.0 port for lower-performance platforms
    • Multi-protocol caching proxy for QuickTime, Windows Media, Real Networks
  • StarBak Communications --
    • Cisco WCCP transparent proxy, 'squid'
    • Windows Media server-side playlist interpreter
  • Katana Technology --
    • Infiniband I/O consolidation for Enterprise IT
    • Scalable virtual multiprocessor for Red Hat Linux, over Infiniband
  • Crossbeam Systems --
    • Linux kernel experiments, x86 SMP architecture-dependent & drivers
    • Network security switch platforms, Linux kernel semi-embedded
    • High-performance Intel x86 and Cavium OCTEON, many-core MP Linux 2.6
    • Cavium host support for EZChip packet processor
    • RedHat Linux with KVM-QEMU for multicore SMP, NUMA-aware x86_64
  • SafeNet --
    • Contractor work on StorageSecure appliance, dual-board Tilera Tile-64
  • Symmetric Computing --
    • OpenSuSE Linux kernel with Distributed Symmetric Multiprocessing
    • Direct-connect InfiniBand cluster with multicore AMD Opteron blades
  • VideoIQ --
    • Embedded Linux platform support for TI8168 Davinci ARM video encoder
    • Multi-blade platform with internal NAS and 100BaseT switch w/VLAN
  • Affirmed Networks --
    • Network configuration for ATCA and blade cluster Mobile Content Cloud
    • MPLS routing in Linux kernel and C++ control plane support
  • Avigilon -- (successor to VideoIQ)
    • R-Series platform respin with embedded NAS, IP and Analog video
    • Embedded Linux via Yocto for Atomic platforms, Intel BayTrail w/POE