1.2 Backplane Configuration
 
There are twenty board slots in a SkyWriter system.Four slots are left open for third party 9U
VME board options, while two are left open for video option boards from SGI.On two
processor systems, slots 12 or 13 will also be vacant when the system is shipped.All other slots
should be filled.The following diagram indicates which boards may be found in which slot.
Graphics Pipeline 1 occupies slots 5-10 while Graphics Pipeline 0 takes up slots 15-20.The
Pipeline Multiplexer (PMUX) daughtercard is located on the Display Generator card of
Pipeline 0.