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Signal assignments for the NuBus row A listed below [Row 'A' Pin Out].
Refer here for NuBus Signal assignments row B, or NuBus Signal pin out row C
| Pin # | Signal Name | Description |
|---|---|---|
| 1 | -12 V | -12 VDC |
| 2 | - | |
| 3 | /SPV | System Parity Valid |
| 4 | /SP | System Parity |
| 5 | /TM1 | Transfer Mode 1 |
| 6 | /AD1 | Address/Data 1 |
| 7 | /AD3 | Address/Data 3 |
| 8 | /AD5 | Address/Data 5 |
| 9 | /AD7 | Address/Data 7 |
| 10 | /AD9 | Address/Data 9 |
| 11 | /AD11 | Address/Data 11 |
| 12 | /AD13 | Address/Data 13 |
| 13 | /AD15 | Address/Data 15 |
| 14 | /AD17 | Address/Data 17 |
| 15 | /AD19 | Address/Data 19 |
| 16 | /AD21 | Address/Data 21 |
| 17 | /AD23 | Address/Data 23 |
| 18 | /AD25 | Address/Data 25 |
| 19 | /AD27 | Address/Data 27 |
| 20 | /AD29 | Address/Data 29 |
| 21 | /AD31 | Address/Data 31 |
| 22 | GND | Ground |
| 23 | GND | Ground |
| 24 | /ARB1 | Arbitrate 1 |
| 25 | /ARB3 | Arbitrate 3 |
| 26 | /ID1 | Slot ID 1 |
| 27 | /ID3 | Slot ID 3 |
| 28 | /ACK | Acknowledge |
| 29 | +5 V | +5 VDC |
| 30 | /RQST | Bus Request |
| 31 | /NMRQ | |
| 32 | +12 V | +12 VDC |
The slash before each of the signal names indicate that the line is active low.
The NuBus is Obsolete and should not be used with new system designs.
Back to the main NuBus page for a description of the interface bus.
Nubus is obsolete and should not be used for new designs, use the PCIe Interface as an upgrade path. Additional PC Buses.
Pinout tables for other Apple protocols are listed here; Apple Computer Buses.
There are no companies that have been identified that produce components for the NuBus interface. However this site does include a generic listing of component manufacturers;
Refer to Component Manufacturers, ordered by name.
