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Standard PC storage devices and I/O connector pinouts. | ||||
This information may be shared freely but not sold for profit! This data is provided in a text format to allow greater ease of formatting into existing technical documents. This information compiled and provided by Dick Perron dperr@randomc.com Standard PC storage devices and I/O connector pinouts. FDD 34 pin connector IDE 40 pin and 44 pin connector RLL/MFM disk drive connectors ESDI disk drive connectors ISA/EISA I/O connectors VESA local bus connector PCI local bus I/O pinouts 30 pin SIMM pinouts 72 pin SIMM pinouts FLOPPY DISK 34 PIN CABLE PINOUT 2--LDENSEL# 4--Microfloppy 6--EDENSEL 8--INDX# 10-MTEN1# 12-DRSEL0# 14-DRSEL1# 16-DTEN0# 18-DIR# 20-STP# 22-WRDATA# 24-WREN# 26-TRK0# 28-WRPRDT# 30-RDDATA# 32-HDSEL1# 34-DSKCHG# All ODD numbered pins are grounded. Note!! Pin 34 is the disk change interrupt line. If the cable is "cocked" on the connector you may not detect the change when u insert a new disk in the drive. A DOS DIR command will always show the contents of the first disk installed. 34 PIN IDC EDGE SOCKET CONNECTOR 34 PIN DIL SOCKET CONNECTOR 34 2 1 33 ----------------- ooooooooooooooooo ----------------- ooooooooooooooooo 33 1 2 34 Edge connectors and IDC connectors are mounted on opposite sides of the ribbon cable in order to orient pin #1 correctly and this is why you have to twist the cable between the 5.25" drive and the 3.5" drive. You will see this on "universal" FDD cable sets. 3.5" IDE/EIDE DISK DRIVE CABLE 40 PIN AND 2.5" 44 PIN MALE DUAL INLINE COMNECTOR 43 39 1 K C A o o o o o o o o o o o o o o o o o o o E o o o o o o o o o o o o o o o o o o o o o Y o o 44 40 2 D B A--MFG USE B--MFG USE C--MFG USE D--MFG USE 1--Reset 2--GND 3--HD7 4--HD8 5--HD6 6--HD9 7--HD5 8--HD10 9--HD4 10-HD11 11-HD3 12-HD12 13-HD2 14-HD13 15-HD1 16-HD14 17-HD0 18-HD15 19-GND 20-KEY 21-RESVD 22-GND 23-IOW# 24-GND 25-IOR# 26-GND 27-IORDY# 28-ALE 29-RESVD 30-GND 31-IRQ14 32-IO16# 33-HA1 34-RESVD# 35-HA0 36-HA2 37-CS0# 38-CS1# 39-DRAC# 40-GND 41-+5V Logic 42-+5V Motor 43-Gnd 44-TYPE ((0=ATA) Note!! Pins 37 and 38 are used for the cable select option. If the CS option is enabled the drive # will be determined by whether the drive is attached to the first or second connector on the cable. A special cable is needed to utilize the cable select option. If the cable does not have pin 20 keyed then pin #1 on the cable is determined by the RED stripe on the edge of the cable. The control signals are the same for the 40 pin and 44 pin cable. The 44 pin socket is a 50 pin connector with two pins removed to clear the wall of the connector socket. Pins A-D at the drive end are reserved for MFG use and are NOT connected to the host through the cable. RLL/MFM HARD DISK IDC-34 Male and IDC-20 Male RLL/MFM IDC-34 CONTROL CABLE pin Signal pin Signal 1 GND 2 Head Sel 8 3 GND 4 Head Sel 4 5 GND 6 Write Gate 7 GND 8 Seek Complete 9 GND 10 Track 0 11 GND 12 Write Fault 13 GND 14 Head Sel 1 15 GND 16 (reserved) 17 GND 18 Head Sel 2 19 GND 20 Index 21 GND 22 Ready 23 GND 24 Step 25 GND 26 Drive Sel 1 27 GND 28 Drive Sel 2 29 GND 30 Drive Sel 3 31 GND 32 Drive Sel 4 33 GND 34 Direction In RLL/MFM IDC-20 DATA CABLE pin Signal pin Signal 1 Drive Selected 2 GND 3 (reserved) 4 GND 5 (reserved) 6 GND 7 (reserved) 8 GND 9 (reserved) 10 (reserved) 11 GND 12 GND 13 Write Data+ 14 Write Data- 15 GND 16 GND 17 Read Data+ 18 NRZ Read Data- 19 GND 20 GND ESDI 34 PIN CONTROL CABLE AND 20 PIN DATA CABLE PINOUTS ESDI IDC-34 CONTROL CABLE pin Signal pin Signal 1 GND 2 Head Sel 3 3 GND 4 Head Sel 2 5 GND 6 Write Gate 7 GND 8 Config/Stat Data 9 GND 10 Transfer Ack 11 GND 12 Attn 13 GND 14 Head Sel 0 15 GND 16 Sect/Add MK Found 17 GND 18 Head Sel 1 19 GND 20 Index 21 GND 22 Ready 23 GND 24 Trans Req 25 GND 26 Drive Sel 1 27 GND 28 Drive Sel 2 29 GND 30 Drive Sel 3 31 GND 32 Read Gate 33 GND 34 Command Data ESDI IDC-20 DATA CABLE pin Signal pin Signal 1 Drive Selected 2 Sect/Add MK Found 3 Seek Complete 4 Addr Mark Enable 5 (reserved) 6 GND 7 Write Clk+ 8 Write Clk- 9 Cartridge Chng 10 Read Ref Clk+ 11 Read Ref Clk- 12 GND 13 NRZ Write Data+ 14 NRZ Write Data- 15 GND 16 GND 17 NRZ Read Data+ 18 NRZ Read Data- 19 GND 20 GND SCSI CONNECTOR PINOUTS (Single Ended) IDC-50 MALE pin Signal pin Signal pin Signal pin Signal 01 GND 02 -DB0 27 GND |28 GND 03 GND 04 -DB1 29 GND |30 GND 05 GND 06 -DB2 31 GND |32 -ATN 07 GND 08 -DB3 33 GND |34 GND 09 GND 10 -DB4 35 GND |36 -BSY 11 GND 12 -DB5 37 GND |38 -ACK 13 GND 14 -DB6 39 GND |40 -RST 15 GND 16 -DB7 41 GND |42 -MSG 17 GND 18 -DBP 43 GND |44 -SEL 19 GND 20 GND 45 GND |46 -C/D 21 GND 22 GND 47 GND |48 -REQ 23 GND 24 GND 49 GND |50 -I/O 25 (open) 26 TERMPW SCSI CONNECTOR PINOUTS (Differential) IDC-50 MALE pin Signal pin Signal pin Signal pin Signal 01 (open) 02 GND 27 GND 28 GND 03 +DB0 04 -DB0 29 +ATN 30 -ATN 05 +DB1 06 -DB1 31 GND 32 GND 07 +DB2 08 -DB2 33 +BSY 34 -BSY 09 +DB3 10 -DB3 35 +ACK 36 -ACK 11 +DB4 12 -DB4 37 +RST 38 -RST 13 +DB5 14 -DB5 39 +MSG 40 -MSG 15 +DB6 16 -DB6 41 +SEL 42 -SEL 17 +DB7 18 -DB7 43 +C/D 44 -C/D 19 +DBP 20 -DBP 45 +REQ 46 -REQ 21 DIFFSENS 22 GND 47 +I/O 48 -I/O 23 GND 24 GND 49 GND 50 GND 25 TERMPWR 26 TERMPWR Macintosh SCSI Connector Pinouts (Single Ended) DB-25S Female pin Signal pin Signal pin Signal pin Signal 01 -REQ 08 -DB0 14 GND 20 -DBP 02 -MSG 09 GND 15 -C/D 21 -DB1 03 -I/O 10 -DB3 16 GND 22 -DB2 04 -RST 11 -DB5 17 -ATN 23 -DB4 05 -ACK 12 -DB6 18 GND 24 GND 06 -BSY 13 -DB7 19 -SEL 25 NC (TERMPWR) 07 GND ISA/EISA I/O CONNECTOR PIN ASSIGNMENTS ISA Bus Connector EISA Bus Connector ----------------- ------------------ Etch Side Component Side Etch Side Component Side pin Signal pin Signal pin Signal pin Signal B1 GND A1 CHCHK# F1 GND E1 CMD# B2 Reset DRV A2 SD7 F2 +5V E2 START# B3 +5V A3 SD6 F3 +5V E3 EXRDY B4 IRQ9 A4 SD5 F4 --- E4 EX32# B5 -5V A5 SD4 F5 --- E5 GND B6 DRQ2 A6 SD3 F6 ACCESS KEY E6 ACCESS KEY B7 -12V A7 SD2 F7 --- E7 EX16# B8 NOWS# A8 SD1 F8 --- E8 SLBURST# B9 +12V A9 SD0 F9 +12V E9 MSBURST# B10 GND A10 CHRDY F10 M/IO# E10 W/R# B11 SMWTC# A11 AEN F11 LOCK# E11 GND B12 SMRDC# A12 SA19 F12 (reserved) E12 (reserved) B13 IOWC# A13 SA18 F13 GND E13 (reserved) B14 IORC# A14 SA17 F14 (reserved) E14 (reserved) B15 DACK3# A15 SA16 F15 BE3# E15 GND B16 DRQ3 A16 SA15 F16 ACCESS KEY E16 ACCESS KEY B17 DACK1# A17 SA14 F17 BE2# E17 BE1# B18 DRQ1 A18 SA13 F18 BE0# E18 LA31# B19 REFRESH# A19 SA12 F19 GND E19 GND B20 BCLK A20 SA11 F20 +5V E20 LA30# B21 IRQ7 A21 SA10 F21 LA29# E21 LA28# B22 IRQ6 A22 SA9 F22 GND E22 LA27# B23 IRQ5 A23 SA8 F23 LA26# E23 LA25# B24 IRQ4 A24 SA7 F24 LA24# E24 GND B25 IRQ3 A25 SA6 F25 ACCESS KEY E25 ACCESS KEY B26 DACK2# A26 SA5 F26 LA16 E26 LA15 B27 T/C A27 SA4 F27 LA14 E27 LA13 B28 BALE A28 SA3 F28 +5V E28 LA12 B29 +5V A29 SA2 F29 +5V E29 LA11 B30 OSC A30 SA1 F30 GND E30 GND B31 GND A31 SA0 F31 LA10 E31 LA9 H1 LA8 G1 LA7 D1 M16# C1 SBHE# H2 LA6 G2 GND D2 IO16# C2 LA23 H3 LA5 G3 LA4 D3 IRQ10 C3 LA22 H4 +5V G4 LA3 D4 IRQ11 C4 LA21 H5 LA2 G5 GND D5 IRQ12 C5 LA20 H6 ACCESS KEY G6 ACCESS KEY D6 IRQ15 C6 LA19 H7 D16 G7 D17 D7 IRQ14 C7 LA18 H8 D18 G8 D19 D8 DACK0# C8 LA17 H9 GND G9 D20 D9 DRQ0 C9 MRDC# H10 D21 G10 D22 D10 DACK5# C10 MWTC# H11 D23 G11 GND D11 DRQ5 C11 SD8 H12 D24 G12 D25 D12 DACK6# C12 SD9 H13 GND G13 D26 D13 DRQ6 C13 SD10 H14 D27 G14 D28 D14 DACK7# C14 SD11 H15 ACCESS KEY G15 ACCESS KEY D15 DRQ7 C15 SD12 H16 D29 G16 GND D16 +5V C16 SD13 H17 +5V G17 D30 D17 MASTER16# C17 SD14 H18 +5V G18 D31 D18 GND C18 SD15 H19 MAKx G19 MREQx VESA LOCAL BUS (VLB) I/O CONNECTOR Etch side Component Side Etch Side Component Side pin Signal pin Signal pin Signal pin Signal B1 Dat00 A1 Dat01 B30 Adr17 A30 Adr16 B2 Dat02 A2 Dat03 B31 Adr15 A31 Adr14 B3 Dat04 A3 GND B32 Vcc A32 Adr12 B4 Dat06 A4 Dat05 B33 Adr13 A33 Adr10 B5 Dat08 A5 Dat07 B34 Adr11 A34 Adr08 B6 GND A6 Dat09 B35 Adr09 A35 GND B7 Dat10 A7 Dat11 B36 Adr07 A36 Adr06 B8 Dat12 A8 Dat13 B37 Adr05 A37 Adr04 B9 Vcc A9 Dat15 B38 GND A38 WBACK# B10 Dat14 A10 GND B39 Adr03 A39 BEO# B11 Dat16 A11 Dat17 B40 Adr02 A40 Vcc B12 Dat18 A12 Vcc B41 n/c A41 BE1# B13 Dat20 A13 Dat19 B42 RESET# A42 BE2# B14 GND A14 Dat21 B43 DC# A43 GND B15 Dat22 A15 Dat23 B44 M/ID# A44 BE3# B16 Dat24 A16 Dat25 B45 W/R# A45 ADS# B17 Dat26 A17 GND B46 A46 B18 Dat28 A18 Dat27 B47 A47 B19 Dat30 A19 Dat29 B48 RDYRTN# A48 LRDY# B20 Vcc A20 Dat31 B49 GND A49 LDEV<x># B21 Adr31 A21 Adr30 B50 IRQ9 A50 LREQ<x># B22 GND A22 Adr28 B51 BRDY# A51 GND B23 Adr29 A23 Adr26 B52 BLAST# A52 LGNT<x># B24 Adr27 A24 GND B53 ID0 A53 Vcc B25 Adr25 A25 Adr24 B54 ID1 A54 ID2 B26 Adr23 A26 Adr22 B55 GND A55 ID3 B27 Adr21 A27 Vcc B56 LCLK A56 ID4 B28 Adr19 A28 Adr20 B57 Vcc A57 LKEN# B29 GND A29 Adr18 B58 LBS16# A58 LEAD5# PCI LOCAL BUS I/O CONNECTOR PCI Cards Universal/3.3V/5V and 32/64 bit pin Signal pin Signal pin Signal pin Signal B1 -12V A1 TRST# B48 AD[10] A48 Ground B2 TCK A2 +12V B49 Ground A49 AD[09] B3 Ground A3 TMS B50 (KEYWAY2) A50 (KEYWAY2) B4 TDO A4 TDI B51 (KEYWAY2) A51 (KEYWAY2) B5 +5V A5 +5V B52 AD[08] A52 C/BE[0]# B6 +5V A6 INTA# B53 AD[07] A53 +3.3V B7 INTB# A7 INTC# B54 +3.3V A54 AD[06] B8 INTD# A8 +5V B55 AD[05] A55 AD[04] B9 PRSNT1# A9 reserved B56 AD[03] A56 Ground B10 reserved A10 +Vi/o B57 Ground A57 AD[02] B11 PRSNT2# A11 reserved B58 AD[01] A58 AD[00] B12 (KEYWAY1) A12 (KEYWAY1) B59 Vi/o A59 +Vi/o B13 (KEYWAY1) A13 (KEYWAY1) B60 ACK64# A60 REQ64# B14 reserved A14 reserved B61 +5V A61 +5V B15 Ground A15 RST# B62 +5V A62 +5V B16 CLK A16 Vi/o B63 reserved A63 Ground B17 Ground A17 VNT# B64 Ground A64 C/BE[7]# B18 REQ# A18 Ground B65 C/BE[6]# A65 C/BE[5]# B19 +Vi/o A19 reserved B66 C/BE[4]# A66 +Vi/o B20 AD[31] A20 AD[30] B67 Ground A67 PAR64 B21 AD[29] A21 +3.3V B68 AD[63] A68 AD[62] B22 Ground A22 AD[28] B69 AD[61] A69 Ground B23 AD[27] A23 AD[26] B70 +Vi/o A70 AD[60] B24 AD[25] A24 Ground B71 AD[59] A71 AD[58] B25 +3.3V A25 AD[24] B72 AD[57] A72 Ground B26 C/BE[3]# A26 IDSEL B73 Ground A73 AD[56] B27 AD[23] A27 +3.3V B74 AD[55] A74 AD[54] B28 Ground A28 AD[22] B75 AD[53] A75 +Vi/o B29 AD[21] A29 AD[20] B76 Ground A76 AD[52] B30 AD[19] A30 Ground B77 AD[51] A77 AD[50] B31 +3.3V A31 AD[18] B78 AD[49] A78 Ground B32 AD[17] A32 AD[16] B79 +Vi/o A79 AD[48] B33 C/BE[2]# A33 +3.3V B80 AD[47] A80 AD[46] B34 Ground A34 FRAME# B81 AD{45] A81 Ground B35 IRDY# A35 Ground B82 Ground A82 AD[44] B36 +3.3V A36 TRDY# B83 AD[43] A83 AD[42] B37 DEVSEL# A37 Ground B84 AD[41] A84 +Vi/o B38 Ground A38 STOP# B85 Ground A85 AD[40] B39 LOCK# A39 +3.3V B86 AD[39] A86 AD[38] B40 PERR# A40 SDONE B87 AD[37] A87 Ground B41 +3.3V A41 SBO# B88 +Vi/o A88 AD[36] B42 SERR# A42 Ground B89 AD[35] A89 AD[34] B43 +3.3V A43 PAR B90 AD[33] A90 Ground B44 C/BE[1]# A44 AD[15] B91 Ground A91 AD[32] B45 AD[14] A45 +3.3V B92 reserved A92 reserved B46 Ground A46 AD[13] B93 reserved A93 Ground B47 AD[12] A47 AD11] B94 Ground A94 reserved Note!! Pins 63-94 exist on 64 bit PCI implementation only. KEYWAY1 exists on Universal and 3.3V boards, they are Ground on 5V boards. KEYWAY2 exists on Universal and 5V boards, they are Ground on 3.3V boards. +Vi/o is 3.3V on 3.3V boards, 5V on 5V boards, and define signal rails on the Universal board. 30 PIN SIMM CONNECTOR 30 pin Fast Page Mode SIMM 256kx8 256kx9 1Mx8 1Mx9 4Mx8 4Mx9 pin Signal pin Signal pin Signal pin Signal 1 Vcc 9 Gnd 17 A8 25 DQ7 2 -CAS 10 DQ2 18 A9 26 QP 3 DQ0 11 A4 19 A10 27 -RAS 4 A0 12 A5 20 DQ5 28 -CASP 5 A1 13 DQ3 21 -WE 29 DP 6 DQ1 14 A6 22 Gnd 30 Vcc 7 A2 15 A7 23 DQ6 8 A3 16 DQ4 24 N/C Note!! QP, CASP and DP are N/C on all x8 bit modules a9 is a N/C on 256k modules a10 is a N/C on 256k and 1M modules Although there are 30 tabs on each side of the SIMM PCB there are only 30 signal connectors on the SIMM socket and each tab is a redundant connection. 72 PIN SIMM CONNECTOR 72 pin Fast Page Mode SIMM 256k/512k/1M/2M/4M/8M x 32/36 bit pin Signal pin Signal pin Signal pin Signal 1 Gnd 19 A10 37 MP1 55 DQ11 2 DQ0 20 DQ4 38 MP3 56 DQ27 3 DQ16 21 DQ20 39 Gnd 57 DQ12 4 DQ1 22 DQ5 40 -CAS0 58 DQ28 5 DQ17 23 DQ21 41 -CAS2 59 Vcc 6 DQ2 24 DQ6 42 -CAS3 60 DQ29 7 DQ18 25 DQ22 43 -CAS1 61 DQ13 8 DQ3 26 DQ7 44 -RAS0 62 DQ30 9 DQ19 27 DQ23 45 -RAS1 63 DQ14 10 Vcc 28 A7 46 N/C 64 DQ31 11 N/C 29 N/C 47 -WE 65 DQ15 12 A0 30 Vcc 48 N/C 66 N/C 13 A1 31 A8 49 DQ8 67 PD1 14 A2 32 A9 50 DQ24 68 PD2 15 A3 33 -RAS3 51 DQ9 69 PD3 16 A4 34 -RAS2 52 DQ25 70 PD4 17 A5 35 MP2 53 DQ10 71 N/C 18 A6 36 MP0 54 DQ26 72 Gnd Note!! MP0,MP1,MP2,MP3 are N/C on all x32 bit modules a9 is a N/C on 256k and 512k modules a10 is a N/C on 256k, 512k, 1M and 4M modules RAS1/RAS3 are N/C on 256k, 1M and 4M modules Although there are 72 tabs on each side of the SIMM PCB there are only 72 signal connectors on the SIMM socket and each tab is a redundant connection.
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