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72 pin 2x36 EDGE female connector layout
72 pin 2x36 EDGE female connector
at the backplane
Available on the old Digital PDP-11
+------------//--------+   +------------//--------+
|AA1 AB1 AC1 // AU1 AV1|   |BA1 BB1 BC1 // BU1 BV1|
|AA2 AB2 AC2 // AU2 AV2|   |BA2 BB2 BC2 // BU2 BV2|
+------------//--------+   +------------//--------+
PIN SIGNAL
AA1/INIT
AA2POWER(+5v)
AB1/INTR
AB2GROUND
AC1/D00
AC2GROUND
AD1/D02
AD2/D01
AE1/D04
AE2/D03
AF1/D06
AF2/D05
AH1/D08
AH2/D07
AJ1/D10
AJ2/D09
AK1/D12
AK2/D11
AL1/D14
AL2/D13
AM1/PA
AM2/D15
AN1GROUND
AN2/PB
AP1GROUND
AP2/BBSY
AR1GROUND
AR2/SACK
AS1GROUND
AS2/NPR
AT1GROUND
AT2/BR7
AU1NPG
AU2/BR6
AV1BG7
AV2GROUND
  
BA1BG6
BA2POWER(+5v)
BB1BG5
BB2GROUND
BC1/BR5
BC2GROUND
BD1GROUND
BD2/BR4
BE1GROUND
BE2BG4
BF1/ACLO
BF2/DCLO
BH1/A01
BH2/A00
BJ1/A03
BJ2/A02
BK1/A05
BK2/A04
BL1/A07
BL2/A06
BM1/A09
BM2/A08
BN1/A11
BN2/A10
BP1/A13
BP2/A12
BR1/A15
BR2/A14
BS1/A17
BS2/A16
BT1GROUND
BT2/C1
BU1/SSYN
BU2/CO
BV1/MSYN
BV2GROUND
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Source(s) of this and additional information: Digital PDP-11 peripherals handbook and Rob Gill
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