Difference between revisions of "UNIBUS H854 header pinout"
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DEC produced several boards (the M9014, an [[DEC card form factor|extended height dual card]], and the M9042 short dual card) cards to replace the standard BC11A [[UNIBUS]] cable. They plug into the same 'UNIBUS In' and 'UNIBUS Out' backplane slots as the BC11A, and contain three 2x20 headers for 40-conductor flat cables (known as H854 cables in DEC parlance); a pair of these cards, and three cables, perform the same role as a BC11A cable. | DEC produced several boards (the M9014, an [[DEC card form factor|extended height dual card]], and the M9042 short dual card) cards to replace the standard BC11A [[UNIBUS]] cable. They plug into the same 'UNIBUS In' and 'UNIBUS Out' backplane slots as the BC11A, and contain three 2x20 headers for 40-conductor flat cables (known as H854 cables in DEC parlance); a pair of these cards, and three cables, perform the same role as a BC11A cable. | ||
| − | Both of these cards use the header pinout given below, so they may be used interchangeably. Following standard electrical engineering practise, every alternate wire in the flat cable is a ground: the active pins are B, D, F, J, L, N, R, T, V, X, Z (using the Berg | + | Both of these cards use the header pinout given below, so they may be used interchangeably. Following standard electrical engineering practise, every alternate wire in the flat cable is a ground: the active pins are B, D, F, J, L, N, R, T, V, X, Z (using the Berg header pin nomenclature). |
==By class== | ==By class== | ||
Revision as of 18:59, 14 June 2016
DEC produced several boards (the M9014, an extended height dual card, and the M9042 short dual card) cards to replace the standard BC11A UNIBUS cable. They plug into the same 'UNIBUS In' and 'UNIBUS Out' backplane slots as the BC11A, and contain three 2x20 headers for 40-conductor flat cables (known as H854 cables in DEC parlance); a pair of these cards, and three cables, perform the same role as a BC11A cable.
Both of these cards use the header pinout given below, so they may be used interchangeably. Following standard electrical engineering practise, every alternate wire in the flat cable is a ground: the active pins are B, D, F, J, L, N, R, T, V, X, Z (using the Berg header pin nomenclature).
By class
| Signal | Assertion | Termination | BC11A pin | Berg header pin |
|---|---|---|---|---|
| Initialization and Shutdown | ||||
| DC LO | L | Slow | BF2 | J3-VV |
| AC LO | L | Slow | BF1 | J2-VV |
| INIT | L | Fast | AA1 | J3-Z |
| Arbitration | ||||
| NPR | L | Fast | AS2 | J3-B |
| BR7 | L | Fast | AT2 | J3-F |
| BR6 | L | Fast | AU2 | J3-L |
| BR5 | L | Fast | BC1 | J3-R |
| BR4 | L | Fast | BD2 | J3-V |
| NPG | H | Grant | AU1 | J3-D |
| BG7 | H | Grant | AV1 | J3-J |
| BG6 | H | Grant | BA1 | J3-N |
| BG5 | H | Grant | BB1 | J3-T |
| BG4 | H | Grant | BE2 | J3-X |
| SACK | L | Fast | AR2 | J3-TT |
| Address | ||||
| A00 | L | Fast | BH2 | J1-D |
| A01 | L | Fast | BH1 | J1-B |
| A02 | L | Fast | BJ2 | J1-J |
| A03 | L | Fast | BJ1 | J1-F |
| A04 | L | Fast | BK2 | J1-N |
| A05 | L | Fast | BK1 | J1-L |
| A06 | L | Fast | BL2 | J1-T |
| A07 | L | Fast | BL1 | J1-R |
| A08 | L | Fast | BM2 | J1-X |
| A09 | L | Fast | BM1 | J1-V |
| A10 | L | Fast | BN2 | J1-BB |
| A11 | L | Fast | BN1 | J1-Z |
| A12 | L | Fast | BP2 | J1-FF |
| A13 | L | Fast | BP1 | J1-DD |
| A14 | L | Fast | BR2 | J1-LL |
| A15 | L | Fast | BR1 | J1-JJ |
| A16 | L | Fast | BS2 | J1-RR |
| A17 | L | Fast | BS1 | J1-NN |
| Data | ||||
| D00 | L | Fast | AC1 | J2-B |
| D01 | L | Fast | AD2 | J2-F |
| D02 | L | Fast | AD1 | J2-D |
| D03 | L | Fast | AE2 | J2-L |
| D04 | L | Fast | AE1 | J2-J |
| D05 | L | Fast | AF2 | J2-R |
| D06 | L | Fast | AF1 | J2-N |
| D07 | L | Fast | AH2 | J2-Z |
| D08 | L | Fast | AH1 | J2-T |
| D09 | L | Fast | AJ2 | J2-Z |
| D10 | L | Fast | AJ1 | J2-X |
| D11 | L | Fast | AK2 | J2-DD |
| D12 | L | Fast | AK1 | J2-BB |
| D13 | L | Fast | AL2 | J2-JJ |
| D14 | L | Fast | AL1 | J2-FF |
| D15 | L | Fast | AM2 | J2-NN |
| Control | ||||
| C0 | L | Fast | BU2 | J3-NN |
| C1 | L | Fast | BT2 | J1-TT |
| PA | L | Fast | AM1 | J2-LL |
| PB | L | Fast | AN2 | J2-RR |
| BBSY | L | Fast | AP2 | J3-BB |
| MSYN | L | Fast | BV1 | J3-LL |
| INTR | L | Fast | AB1 | J3-FF |
| SSYN | L | Fast | BU1 | J3-JJ |
| Power | ||||
| Ground | N/A | N/A | AB2 | |
| Ground | N/A | N/A | AC2 | |
| Ground | N/A | N/A | AN1 | |
| Ground | N/A | N/A | AP1 | |
| Ground | N/A | N/A | AR1 | |
| Ground | N/A | N/A | AS1 | |
| Ground | N/A | N/A | AT1 | |
| Ground | N/A | N/A | AV2 | |
| Ground | N/A | N/A | BB2 | |
| Ground | N/A | N/A | BC2 | |
| Ground | N/A | N/A | BD1 | |
| Ground | N/A | N/A | BE1 | |
| Ground | N/A | N/A | BT1 | |
| Ground | N/A | N/A | BV2 | |
| Ground | N/A | N/A | N/A | J1-VV |
| Ground | N/A | N/A | N/A | J2-TT |
| Ground | N/A | N/A | N/A | J3-DD |
| Ground | N/A | N/A | N/A | J3-RR |
| +5 | N/A | N/A | AA2 | |
| +5 | N/A | N/A | BA2 | |
| Other | ||||
| No connection | N/A | N/A | BA2 | |
| No connection | N/A | N/A | BB2 | |
By Berg pin
| Signal | Assertion | Termination | BC11A pin | Berg header pin |
|---|---|---|---|---|
| Header J1 | ||||
| A01 | L | Fast | BH1 | J1-B |
| A00 | L | Fast | BH2 | J1-D |
| A03 | L | Fast | BJ1 | J1-F |
| A02 | L | Fast | BJ2 | J1-J |
| A05 | L | Fast | BK1 | J1-L |
| A04 | L | Fast | BK2 | J1-N |
| A07 | L | Fast | BL1 | J1-R |
| A06 | L | Fast | BL2 | J1-T |
| A09 | L | Fast | BM1 | J1-V |
| A08 | L | Fast | BM2 | J1-X |
| A11 | L | Fast | BN1 | J1-Z |
| A10 | L | Fast | BN2 | J1-BB |
| A13 | L | Fast | BP1 | J1-DD |
| A12 | L | Fast | BP2 | J1-FF |
| A15 | L | Fast | BR1 | J1-JJ |
| A14 | L | Fast | BR2 | J1-LL |
| A17 | L | Fast | BS1 | J1-NN |
| A16 | L | Fast | BS2 | J1-RR |
| C1 | L | Fast | BT2 | J1-TT |
| Ground | N/A | N/A | N/A | J1-VV |
| Header J2 | ||||
| D00 | L | Fast | AC1 | J2-B |
| D02 | L | Fast | AD1 | J2-D |
| D01 | L | Fast | AD2 | J2-F |
| D04 | L | Fast | AE1 | J2-J |
| D03 | L | Fast | AE2 | J2-L |
| D06 | L | Fast | AF1 | J2-N |
| D05 | L | Fast | AF2 | J2-R |
| D08 | L | Fast | AH1 | J2-T |
| D07 | L | Fast | AH2 | J2-V |
| D10 | L | Fast | AJ1 | J2-X |
| D09 | L | Fast | AJ2 | J2-Z |
| D12 | L | Fast | AK1 | J2-BB |
| D11 | L | Fast | AK2 | J2-DD |
| D14 | L | Fast | AL1 | J2-FF |
| D13 | L | Fast | AL2 | J2-JJ |
| PA | L | Fast | AM1 | J2-LL |
| D15 | L | Fast | AM2 | J2-NN |
| PB | L | Fast | AN2 | J2-RR |
| Ground | N/A | N/A | N/A | J2-TT |
| AC LO | L | Slow | BF1 | J2-VV |
| Header J3 | ||||
| NPR | L | Fast | AS2 | J3-B |
| NPG | H | Grant | AU1 | J3-D |
| BR7 | L | Fast | AT2 | J3-F |
| BG7 | H | Grant | AV1 | J3-J |
| BR6 | L | Fast | AU2 | J3-L |
| BG6 | H | Grant | BA1 | J3-N |
| BR5 | L | Fast | BC1 | J3-R |
| BG5 | H | Grant | BB1 | J3-T |
| BR4 | L | Fast | BD2 | J3-V |
| BG4 | H | Grant | BE2 | J3-X |
| INIT | L | Fast | AA1 | J3-Z |
| BBSY | L | Fast | AP2 | J3-BB |
| Ground | N/A | N/A | N/A | J3-DD |
| INTR | L | Fast | AB1 | J3-FF |
| SSYN | L | Fast | BU1 | J3-JJ |
| MSYN | L | Fast | BV1 | J3-LL |
| C0 | L | Fast | BU2 | J3-NN |
| Ground | N/A | N/A | N/A | J3-RR |
| SACK | L | Fast | AR2 | J3-TT |
| DC LO | L | Slow | BF2 | J3-VV |
