Computer Hardware User Manual

MAGMA
38 Appendix B Need More Slots?
The following image shows the Apple Profiler display when a MAC has
2 Expansion Systems connected in a “Fan-Out” configuration
MAC System Profiler with 2 PCI to PCI Expansion Systems Installed
in a “Fan-Out Configuration.
Daisy-Chaining
Recognizing the typical insignificance of the performance variance
between the “Fan-Out” and “Daisy-Chaining” configurations, the primary
reason for using this one would be limitations on physical space. This
could be the number of available slots on the computer motherboard, or
a lack of desk or rack space.
Daisy-Chaining ExpansionSystems
PCI Expansion
HostCard
Simply place anotherHost ExpansionCar d int o
avacant PCI slot on the 1st ExpansionSystem.
Thenconnect #1to #2 using the ExpansionCable.
PCI Expansion
HostCard
4, 7, 13Slot Chassis
4, 7, 13Slot Chassis
Magma
Expansion
Cable
Proprietary
Expansion
Cable
In the daisy-chain configuration, successive PCI expansion systems are
added to the "end" of the PCI bus hierarchy, which adds "depth" to the
PCI Local Bus by increasing the number of PCI Local Bus levels active
in the system configuration.