There were actually PCI and PCI-X external chassis boxes (in all 4 forms), they were expensive as hell, but they were a critical tool for developing PCI/PCI-X d

There were actually PCI and PCI-X external chassis boxes (in all 4 forms), they were expensive as hell, but they were a critical tool for developing PCI/PCI-X devices. They usually used 1 or 2 scsi-3 (80-pin) connector to connect from the host to the box (I think you could get away with 1 connector on either 32bit standard if you dropped some of the non-vital signals).