NuBus organization

Data, Control, and Parity

Arbitration

Clock

ClockGenerator

Slot ID

Slave

Slot ID

Master

Slot ID

Slave

Slot ID

Master

Utility reset, clock

Control start, ack, tm0, tm1

Addr/Data ad[31:0]

Arbitration arb[3:0], rqst

Parity sp, spv

Slot ID id[3:0]

Power/Ground +5 (11), -5 (8), +12 (2), -12v (2), gnd (23)Total 96 pins 3 rows of 32 pins

• Up to 16 elements

  • masters originate operations
  • slaves respond to requestsfrom masters
  • slot ID provides partof addressing

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