History
Work on PCI began at Intel's Architecture Development Lab circa 1990.
A team of Intel engineers (composed primarily of ADL engineers) defined the architecture and developed a proof of concept chipset and platform (Saturn) partnering with teams in the company's desktop PC systems and core logic product organizations. The original PCI architecture team included, among others, Dave Carson, Norm Rasmussen, Brad Hosler, Ed Solari, Bruce Young, Gary Solomon, Ali Oztaskin, Tom Sakoda, Rich Haslam, Jeff Rabe, and Steve Fischer.
PCI (Peripheral Component Interconnect) was immediately put to use in servers, replacing MCA and EISA as the server expansion bus of choice. In mainstream PCs, PCI was slower to replace VESA Local Bus (VLB), and did not gain significant market penetration until late 1994 in second-generation Pentium PCs. By 1996 VLB was all but extinct, and manufacturers had adopted PCI even for 486 computers. EISA continued to be used alongside PCI through 2000. Apple Computer adopted PCI for professional Power Macintosh computers (replacing NuBus) in mid-1995, and the consumer Performa product line (replacing LC PDS) in mid-1996.
Later revisions of PCI added new features and performance improvements, including a 66 MHz 3.3 V standard and 133 MHz PCI-X, and the adaptation of PCI signaling to other form factors. Both PCI-X 1.0b and PCI-X 2.0 are backward compatible with some PCI standards.
The PCI-SIG introduced the serial PCI Express in 2004. At the same time they renamed PCI as Conventional PCI. Since then, motherboard manufacturers have included progressively fewer Conventional PCI slots in favor of the new standard.
| Spec | Year | Change Summary |
|---|---|---|
| PCI 1.0 | 1992 | Original issue |
| PCI 2.0 | 1993 | Incorporated connector and add-in card specification |
| PCI 2.1 | 1995 | Incorporated clarifications and added 66 MHz chapter |
| PCI 2.2 | 1998 | Incorporated ECNs, and improved readability |
| PCI 2.3 | 2002 | Incorporated ECNs, errata, and deleted 5 volt only keyed add-in cards |
| PCI 3.0 | 2002 | Removed support for the 5.0 volt keyed system board connector |
Read more about this topic: Conventional PCI
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