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 DEC UNIBUS Signals and Pinout

DEC UNIBUS Signals and Pinout
97.09.01

  Name   High/Low Termination UNIBUS Cable SPC Backplane
          Type    
INITIALIZATION AND SHUTDOWN        
  BUS DC LO L L Slow BF2 CN1
  BUS AC LO L L Slow BF1 CV1
  BUS INIT L L Fast AA1 DL1
ARBITRATION              
  BUS NPR L L Fast AS2 FJ1
  BUS BR7 L L Fast AT2 DD2
  BUS BR6 L L Fast AU2 DE2
  BUS BR5 L L Fast BC1 DF2
  BUS BR4 L L Fast BD2 DH2
  BUS NPG H H Grant AU1 In-CA1; Out-CB1
  BUS BG7 H H Grant AV1 In-DK2; Out-DL2
  BUS BG6 H H Grant BA1 In-DM2; Out-DN2
  BUS BG5 H H Grant BB1 In-DP2; Out-DR2
  BUS BG4 H H Grant BE2 In-DS2; Out-DT2
  BUS SACK L L Fast AR2 FT2
DATA TRANSFER              
  BUS A00 L L Fast BH2 EH2
  BUS A01 L L Fast BH1 EH1
  BUS A02 L L Fast BJ2 EF1
  BUS A03 L L Fast BJ1 EV2
  BUS A04 L L Fast BK2 EU2
  BUS A05 L L Fast BK1 EV1
  BUS A06 L L Fast BL2 EU1
  BUS A07 L L Fast BL1 EP2
  BUS A08 L L Fast BM2 EN2
  BUS A09 L L Fast BM1 ER1
  BUS A10 L L Fast BN2 EP1
  BUS A11 L L Fast BN1 EL1
  BUS A12 L L Fast BP2 EC1
  BUS A13 L L Fast BP1 EK2
  BUS A14 L L Fast BR2 EK1
  BUS A15 L L Fast BR1 ED2
  BUS A16 L L Fast BS2 EE2
  BUS A17 L L Fast BS1 ED1
  BUS C0 L L Fast BU2 EJ2
  BUS C1 L L Fast BT2 EF2
  BUS D00 L L Fast AC1 CS2
  BUS D01 L L Fast AD2 CR2
  BUS D02 L L Fast AD1 CU2, FE2*
  BUS D03 L L Fast AE2 CT2, FL1*
  BUS D04 L L Fast AE1 CN2, FN2*
  BUS D05 L L Fast AF2 CP2, FF1*
  BUS D06 L L Fast AF1 CV2, FF2*
  BUS D07 L L Fast AH2 CM2, FH1*
  BUS D08 L L Fast AH1 CL2, FK1*
  BUS D09 L L Fast AJ2 CK2
  BUS D10 L L Fast AJ1 CJ2
  BUS D11 L L Fast AK2 CH1
  BUS D12 L L Fast AK1 CH2
  BUS D13 L L Fast AL2 CF2
  BUS D14 L L Fast AL1 CE2
  BUS D15 L L Fast AM2 CD2
  BUS PA L L Fast AM1 CC1
  BUS PB L L Fast AN2 CS1
  BUS BBSY L L Fast AP2 FD1
  BUS MSYN L L Fast BV1 EE1
  BUS INTR L L Fast AB1 FM1
  BUS SSYN L L Fast BU1 EJ1, FC1*
MISCELLANEOUS              
  BOOT ENABL L L N/A <NONE> AR1
  HALT REQ L L N/A <NONE> CP1
  HALT GRANT L L N/A <NONE> CR1
  LTC     N/A N/A <NONE> CD1

?* FOR FORWARDS COMPATIBILITY, USE THE FIRST PIN RATHER THAN THE SECOND

(Thanks to Kevin McQuiggin)

 

 

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