Connector - NuBusAvailable on old Apple Macintosh computers and on NeXT computers. Standard: IEEE 1196, "Nubus-A simple 32-bit backplane bus". Texas Instruments owns the standard today.UNKNOWN CONNECTOR at the card. UNKNOWN CONNECTOR at the computer. Pin | Name | Description |
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1 | -12 V | -12 VDC | 2 | - | | 3 | /SPV | | 4 | /SP | | 5 | /TM1 | | 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 | | 25 | /ARB3 | | 26 | /ID1 | | 27 | /ID3 | | 28 | /ACK | | 29 | +5 V | +5 VDC | 30 | /RQST | | 31 | /NMRQ | | 32 | +12 V | +12 VDC |
Row B Pin | Name | Description | 1 | -12 V | -12 VDC | 2 | GND | Ground | 3 | GND | Ground | 4 | +5 V | +5 VDC | 5 | +5 V | +5 VDC | 6 | +5 V | +5 VDC | 7 | +5 V | +5 VDC | 8 | * | Reserved ? | 9 | * | Reserved ? | 10 | * | Reserved ? | 11 | * | Reserved ? | 12 | GND | Ground | 13 | GND | Ground | 14 | GND | Ground | 15 | GND | Ground | 16 | GND | Ground | 17 | GND | Ground | 18 | GND | Ground | 19 | GND | Ground | 20 | GND | Ground | 21 | GND | Ground | 22 | GND | Ground | 23 | GND | Ground | 24 | ** | Reserved ? | 25 | ** | Reserved ? | 26 | ** | Reserved ? | 27 | ** | Reserved ? | 28 | +5 V | +5 VDC | 29 | +5 V | +5 VDC | 30 | GND | Ground | 31 | GND | Ground | 32 | +12 V | | Row C Pin | Name | Description | 1 | /RESET | Reset | 2 | - | | 3 | +5 V | +5 VDC | 4 | +5 V | +5 VDC | 5 | /TM0 | | 6 | /AD0 | Address/Data 0 | 7 | /AD2 | Address/Data 2 | 8 | /AD4 | Address/Data 4 | 9 | /AD6 | Address/Data 6 | 10 | /AD8 | Address/Data 8 | 11 | /AD10 | Address/Data 10 | 12 | /AD12 | Address/Data 12 | 13 | /AD14 | Address/Data 14 | 14 | /AD16 | Address/Data 16 | 15 | /AD18 | Address/Data 18 | 16 | /AD20 | Address/Data 20 | 17 | /AD22 | Address/Data 22 | 18 | /AD24 | Address/Data 24 | 19 | /AD26 | Address/Data 26 | 20 | /AD28 | Address/Data 28 | 21 | /AD30 | Address/Data 30 | 22 | GND | Ground | 23 | /PFW | | 24 | /ARB0 | | 25 | /ARB2 | | 26 | /ID0 | | 27 | /ID2 | | 28 | /START | | 29 | +5 V | +5 VDC | 30 | +5 V | +5 VDC | 31 | GND | Ground | 32 | /CLK | Clock | +5V Power to slot; 2 amps per slot maximum continuous. +12V Power to slot; 0.25 amps per slot maximum continuous. -12V Power to slot; 0.1 amps per slot maximum continuous. -5.2V Unused GND Power return for +5V, +12V, and -12V RESET Open collector signal; card should use to reset circuitry. SPV Slot Parity Valid; asserted if card provides parity. Never asserted under Apple NuBus. SP Slot Parity; odd parity of AD0-AD3 if SPV asserted. TM0 - TM1 Transaction modifiers. AD<31:0> Address/Data bits 31 to 0. PFW Power Fail Warning given 2ms before AC power is lost. ARB<3:0> Arbitration bits 3 to 0; arbitrates system mastership. ID<3:0> Geographical address 3 to 0; hard-coded to slot. START Asserted to indicate an address on AD lines. ACK Acknowledge of START cycle. RQST Request; asserted to request bus mastership. NMRQ Non-master request; used to signal an interrupt. CLKClock. Asymmetrical 10MHz clock; synchronous transactions on NuBus.
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