blank.gif (43 bytes)

Church Of The
Swimming Elephant

PC Innovation Bus

PCI Local Bus Highlights

The PCI Local Bus was developed to enable PC innovation in: 
  • allow second to none graphics for PCs 
  • overcome standard bus limitations 
  • e.g., multi-media, motion video at volume price points 
  • highly integrated systems 
  • lowest cost peripherals 
  • investment spanning multiple CPU generations 
by driving a component-to-component connection standard for PCs, to complement existing board-to-board connection standards. 

Performance features include:

  • Data bursting as normal operating mode - both read & write
  • Linear burst ordering
  • Concurrency support (deadlock, buffering solutions)
  • Low latency guarantees for real time devices
  • Access oriented arbitration (not time slice)

Cost features:

  • No connection glue; no external data buffers
  • Low pin count interface
  • Implementable in existing ASIC technologies


  • Thorough electrical design for multiple loads at 33MHz
  • Error detection, reporting


  • Processor independent; peripherals off processor "treadmill"
  • Multi-media support
  • Compatible with existing expansion standards
  • Scaleability designed in from the beginning
  • Applicable from laptop to server


  • Multi-master; peer-to-peer
  • 32-bit multiplexed, processor independent
  • Low pin count; 45 slave; 47 master
  • Synchronous, 8-33 MHz (132 Mbytes/sec)
  • Variable length, linear bursting - read & write
  • Parity on address, data, command
  • Concurrency/pipelining support
  • Initialization hooks for auto-configuration
  • Arbitration: central, access oriented, "hidden"
  • 64-bit extention transparently interoperable with 32-bit


  • CMOS drivers; TTL voltage levels
  • 5V, 3.3V interoperable
  • Reflected wave, rail-to-rail signaling
  • Dynamic current/voltage specified for drivers
  • Optimized drivers minimize pwr/gnd requirements

  • Direct drive - no external buffers; comprehends connectors


Protect yourself from cyberstalkers, identity thieves, and those who would snoop on you.
Stop spam from invading your inbox without losing the mail you want. We give you more control over your e-mail than any other service.
Block popups, ads, and malicious scripts while you surf the net through our anonymous proxies.
Participate in Usenet, host your web files, easily send anonymous messages, and more, much more.
All private, all encrypted, all secure, all in an easy to use service, and all for only $5.95 a month!

Service Details

Have you gone to church today?
All pages ©1999, 2000, 2001, 2002, 2003 Church of the Swimming Elephant unless otherwise stated
Church of the Swimming Elephant©1999, 2000, 2001, 2002, 2003 is a wholly owned subsidiary of Packetderm, LLC.

Packetderm, LLC
210 Park Ave #308
Worcester, MA 01609