Technical data

CHALLENGE/Onyx Diagnostic Road Map 1-9
IO4. The fourth digit represents a specific drive; the fifth digit is the partition on the
selected drive. See Figure 1-6 for an example of SCSI drive addressing.
Figure 1-6 SCSI Drive Addressing
1.2.5 FCI Bus
The flat cable interface (FCI) is a Silicon Graphics proprietary interface that connects a
variety of local and remote peripheral resources, such as graphics controllers, VMEbus
adapters, and FDDI adapters. The FCI operates at 160 MB per second (maximum) for
graphics controllers and at a maximum of 200 MB per second with VMEbus adapters.
Note: The maximum effective VMEbus transfer rate may be in the range of 50 MB per
second with DMA. The transfer rate is less with PIO-driven I/O.
IO4 slot assignment 15
Channel
6
Mezz card
Mezz card
5
7
0
1
3
2
4
IO4
base
board