KDF11-U CPU pinout
The KDF11-U CPU of the PDP-11/24 plugs into a specially-wired slot of the -11/24 backplane. Some of the customization relates to the semi-separate UNIBUS, and Extended UNIBUS used between the CPU and main memory; others are part of the connection between the CPU and the optional UNIBUS map board, the KT24.
The table below provides the complete, detailed pinout (as far as the Field Maintenance Print Set shows) of the edge connector of the CPU PCB. Pins are identified in the usual DEC manner: pin 'XYz' is on connector 'X'; contact land 'Y' of that connector; and 'z' identifies the side. The 'Location' gives the location of the connection in the KDF11-U engineering drawings: 'Kx' is the page number, and the second field, of the form 'Xn', are the coordinates on that page. Pins which appear on multiple pages have multiple locations.
Pins with blank 'Location' fields mostly do not seem to be connected to anything; 'Signals' listed for such pins are those usually seen on those pins in MUD and SPC slots (which is what the transcribed list started with); they not be of any value in reality.
| Pin | Location | Signal |
|---|---|---|
| AA1 | K9-B1 | BMIB00 |
| AA2 | K3-B7 | +5V |
| AB1 | K9-B1 | BMIB01 |
| AB2 | Boot Enable | |
| AC1 | K9-B1 | BMIB02 |
| AC2 | K3-B6 | Gnd |
| AD1 | K9-B1 | BMIB03 |
| AD2 | K13-B6 | DAL16 H |
| AE1 | K9-B1 | BMIB04 |
| AE2 | K12-C2 | BSIO H |
| AF1 | K9-B1 | BMIB05 |
| AF2 | D05 | |
| AH1 | K9-A1 | BMIB06 |
| AH2 | K13-A5 | MREPLY L |
| AJ1 | K9-A1 | BMIB07 |
| AJ2 | K13-A5 | ABORT L |
| AK1 | K9-D1 | BMIB08 |
| AK2 | K9-D1 | BMIB11 |
| AL1 | K9-D1 | BMIB09 |
| AL2 | K9-C1 | BMIB12 |
| AM1 | K9-D1 | BMIB10 |
| AM2 | K9-C1 | BMIB13 |
| AN1 | K11-C4 | MA21 |
| AN2 | K9-C1 | BMIB14 |
| AP1 | K11-B4 | MA20 |
| AP2 | BBSY | |
| AR1 | K6-A3 | BOOT ENABLE L |
| AR2 | K13-B6 | DAL18 H |
| AS1 | ||
| AS2 | K13-B6 | DAL17 H |
| AT1 | K3-A6 | Gnd |
| AT2 | K9-C1 | BMIB15 |
| AU1 | K13-A5 | UBMAP L |
| AU2 | K1-B6 | LREAD L |
| AV1 | K13-B8 | +5V |
| AV2 | K13-A6 | DMMUS L |
| BA1 | K1-A6 | C0 H |
| BA2 | K3-B7 | +5V |
| BB1 | K13-B6 | DAL19 H |
| BB2 | K1-D5 | MCLK L |
| BC1 | K1-A6 | LAT ADD 5 |
| BC2 | K3-B6 | Gnd |
| BD1 | K13-B6 | DAL21 H |
| BD2 | K13-B6 | DAL20 H |
| BE1 | K11-B4 | MA19 |
| BE2 | K11-B4 | MA18 |
| BF1 | K3-A3; K6-A5 | BUS ACLO |
| BF2 | K3-A2; K6-A5 | BUS DCLO |
| BH1 | K11-B4 | MA01 |
| BH2 | K11-A4 | MA00 |
| BJ1 | K11-A6 | MA03 |
| BJ2 | K11-A6 | MA02 |
| BK1 | K11-B6 | MA05 |
| BK2 | K11-B6 | MA04 |
| BL1 | K11-B6 | MA07 |
| BL2 | K11-B6 | MA06 |
| BM1 | K11-C6 | MA09 |
| BM2 | K11-C6 | MA08 |
| BN1 | K11-D6 | MA11 |
| BN2 | K11-C6 | MA10 |
| BP1 | K11-D6 | MA13 |
| BP2 | K11-D6 | MA12 |
| BR1 | K11-C4 | MA15 |
| BR2 | K11-C4 | MA14 |
| BS1 | K11-D4 | MA17 |
| BS2 | K11-D4 | MA16 |
| BT1 | K3-A6 | Gnd |
| BT2 | K11-A4 | MC1 |
| BU1 | K1-B6 | BUS REQ L |
| BU2 | K11-A4 | MC0 |
| BV1 | K1-B1 | MEM MSYN L |
| BV2 | K1-C6 | DIN H |
| CA1 | ||
| CA2 | K3-B7 | +5V |
| CB1 | K3-D6; K10-A3 | BUS NPG |
| CB2 | ||
| CC1 | K2-D8; K3-C5 | BUS PA |
| CC2 | K3-B6 | Gnd |
| CD1 | K6-D8 | LINE CLOCK |
| CD2 | K3-D6; K5-C3 | BUS D15 |
| CE1 | K1-D6 | CT0 H |
| CE2 | K3-C5; K5-C3 | BUS D14 |
| CF1 | K1-D6 | CT1 H |
| CF2 | K3-D8; K5-C3 | BUS D13 |
| CH1 | K3-D8; K5-B3 | BUS D11 |
| CH2 | K3-C5; K5-C3 | BUS D12 |
| CJ1 | K1-D1 | ENB A&C H |
| CJ2 | K3-C5; K5-B3 | BUS D10 |
| CK1 | K1-A8 | E39p26 D9 |
| CK2 | K3-D8; K5-B3 | BUS D09 |
| CL1 | K2-C2 | INT BOOT SSYN L |
| CL2 | K3-C7; K5-B3 | BUS D08 |
| CM1 | K4-B7 | DIR IN L |
| CM2 | K3-D8; K4-C3 | BUS D07 |
| CN1 | K11-D4 | I/O PAGE H |
| CN2 | K3-C7; K4-C3 | BUS D04 |
| CP1 | K6-A6 | HALT REQ L |
| CP2 | K3-D8; K4-C3 | BUS D05 |
| CR1 | K1-A1 | HALT GRANT L |
| CR2 | K3-D8; K4-B3 | BUS D01 |
| CS1 | K2-D8; K3-D6 | BUS PB |
| CS2 | K3-C7; K4-A3 | BUS D00 |
| CT1 | K3-A6 | Gnd |
| CT2 | K3-D8; K4-B3 | BUS D03 |
| CU1 | K12-D5 | +15V |
| CU2 | K3-C7; K4-B3 | BUS D02 |
| CV1 | AC LO | |
| CV2 | K3-C7; K4-C3 | BUS D06 |
| DA1 | K7-D1 | CHIP RESET H |
| DA2 | K3-B7 | +5V |
| DB1 | K7-C3 | COMB CSEL L |
| DB2 | ||
| DC1 | K4-A5 | BDAL00 |
| DC2 | K3-B6 | Gnd |
| DD1 | K4-A5 | BDAL01 |
| DD2 | K3-C5; K6-B6 | BUS BR7 |
| DE1 | K4-A5 | BDAL02 |
| DE2 | K3-D6; K6-B6 | BUS BR6 |
| DF1 | K4-A5 | BDAL03 |
| DF2 | K3-C3; K6-C6 | BUS BR5 |
| DH1 | K4-D5 | BDAL04 |
| DH2 | K3-C3; K6-C6 | BUS BR4 |
| DJ1 | K4-D5 | BDAL05 |
| DJ2 | K5-D6 | BDAL15 |
| DK1 | K4-D5 | BDAL06 |
| DK2 | K5-D6 | BDAL14 |
| DL1 | K2-D3; K3-C7 | BUS INIT |
| DL2 | K3-D6; K10-D6 | BUS BG7 |
| DM1 | K4-D5 | BDAL07 |
| DM2 | ||
| DN1 | K5-A5 | BDAL08 |
| DN2 | K3-D6; K10-D6 | BUS BG6 |
| DP1 | K5-A5 | BDAL09 |
| DP2 | ||
| DR1 | K5-A5 | BDAL10 |
| DR2 | K3-D4; K10-D6 | BUS BG5 |
| DS1 | K5-A5 | BDAL11 |
| DS2 | ||
| DT1 | K3-A6 | Gnd |
| DT2 | K3-D4; K10-C6 | BUS BG4 |
| DU1 | K5-D6 | BDAL13 |
| DU2 | K2-C6 | MMU CYC L |
| DV1 | ||
| DV2 | K5-C6 | BDAL12 |
| EA1 | ||
| EA2 | K3-B7 | +5V |
| EB1 | ||
| EB2 | ||
| EC1 | K3-D2; K11-D7 | BUS A12 |
| EC2 | K3-B6 | Gnd |
| ED1 | K3-C1; K11-D5 | BUS A17 |
| ED2 | K3-C1; K11-D5 | BUS A15 |
| EE1 | K2-D3; K3-C1 | BUS MSYN |
| EE2 | K3-D2; K11-D5 | BUS A16 |
| EF1 | K3-D4; K11-A7 | BUS A02 |
| EF2 | K3-D2; K11-A5 | BUS C1 |
| EH1 | K3-C3; K11-A5 | BUS A01 |
| EH2 | K3-D4; K11-A5 | BUS A00 |
| EJ1 | K2-D3; K3-C1 | BUS SSYN |
| EJ2 | K3-D2; K11-A5 | BUS C0 |
| EK1 | K3-D2; K11-D5 | BUS A14 |
| EK2 | K3-C1; K11-D7 | BUS A13 |
| EL1 | K3-C1; K11-D7 | BUS A11 |
| EL2 | K12-D6 | SO2 |
| EM1 | ||
| EM2 | K12-D6 | SO1 |
| EN1 | ||
| EN2 | K3-D2; K11-C7 | BUS A08 |
| EP1 | K3-D2; K11-D7 | BUS A10 |
| EP2 | K3-C3; K11-C7 | BUS A07 |
| ER1 | K3-C1; K11-C7 | BUS A09 |
| ER2 | K1-C1 | BUS MSTR L |
| ES1 | K7-C7 | UPPER 128K H |
| ES2 | K1-A5 | QV HOLD L |
| ET1 | K3-A6 | Gnd |
| ET2 | K7-C7 | LBSIO H |
| EU1 | K3-D4; K11-C7 | BUS A06 |
| EU2 | K3-D4; K11-A7 | BUS A04 |
| EV1 | K3-C3; K11-A7 | BUS A05 |
| EV2 | K3-C3; K11-A7 | BUS A03 |
| FA1 | ||
| FA2 | K3-B7 | +5V |
| FB1 | ||
| FB2 | K12-C6 | -15V |
| FC1 | SSYN | |
| FC2 | K3-B6 | Gnd |
| FD1 | K2-D3; K3-C5 | BUS BBSY |
| FD2 | K12-A8 | +5VF |
| FE1 | Unknown | Unknown |
| FE2 | D02 | |
| FF1 | D05 | |
| FF2 | K9-B5 | E93p12 |
| FH1 | D07 | |
| FH2 | ||
| FJ1 | K3-D6; K10-B8 | BUS NPR |
| FJ2 | K9-C3 | E106p7 |
| FK1 | D08 | |
| FK2 | K12-D8 | SI2 H |
| FL1 | K1-B2 | ALLOW MEM MSYN H |
| FL2 | K12-D8 | SI2 L |
| FM1 | K3-C7 | BUS INTR |
| FM2 | K12-C8 | SI1 L |
| FN1 | K12-D4 | DATA TERM RDY 2 |
| FN2 | K12-C8 | SI1 H |
| FP1 | K12-D4 | DATA TERM RDY 1 |
| FP2 | K12-A5 | DC ON |
| FR1 | K12-D8 | REMOTE H |
| FR2 | K12-A5 | RUN |
| FS1 | K12-D8 | REMOTE L |
| FS2 | K12-B4 | FPBOOT |
| FT1 | K3-A6 | Gnd |
| FT2 | K3-C5; K6-B6; K10-A1 | BUS SACK |
| FU1 | K12-C4 | CPU RUN L |
| FU2 | K12-B4 | FPHALT |
| FV1 | ||
| FV2 | K12-A4 | FPENB BREAK |
External links
- 11/24 Field Maintenance Print Set (August, 1980 revision) - KDF11-UA Field Maintenance Print Set (MP01028) is on pp. 145-167
- 11/24 Field Maintenance Print Set (March, 1984 revision) - KDF11-UA Field Maintenance Print Set (MP01028) is on pp. 126-140
