Parts of the this FAQ were taken directly from the comp.sys.ibm.pc.hardware.* FAQ (in HTML!) and much of the credit is due to its authors.
The official resting place of the above FAQ is:
Site: rtfm.mit.edu
Directory: /pub/usenet/news.answers/pc-hardware-faq
Or:
Site: ftp.uu.net
Directory: /archive/usenet/news.answers/pc-hardware-faq
Or:
URL: http://www.cis.ohio-state.edu/hypertext/faq/usenet/pc-hardware-faq/top.html
In any case, credit is given where it is due and known.
Original VGA (31.5 KHz - 640x480)
SVGA (35-37 KHz - 800x600) 15 pin sub D:
6
1 Red (Analog) 6 Red Return 11 (ID0) GND (Color) 11. . . 1
2 Green (Analog) 7 Green Return 12 (ID1) NC (Color) . . .
3 Blue (Analog) 8 Blue Retuen 13 Horzontal Sync . . .
4 Reserved 9 No Connect 14 Vertical Sync . . .
5 Ground 10 Ground 15 No Connect . . .
15 10 5
Mono VGA is similar using only the Green Video and Return.
VESA Standard Feature Connector pin assignment pin assignment 1 PB 2 PG 3 PR 4 PI 5 SB 6 SG 7 SR 8 SI 9 Dot Clock 10 Blank 11 HSync 12 VSync 13 GND 14 GND 15 GND 16 GND 17 Ext Video Sel 18 Ext Sync Sel 19 Ext DotClock Sel20 N/C 21 GND 22 GND 23 GND 24 GND 25 N/C 26 N/C
Note that many of the pins shown above as "no connects" (actually, these were sometimes used as monitor ID bits by many manufacturers) are now defined under the VESA Display Data Channel standard. This standard provides two protocols for display ID and control, including support for the full ACCESS.bus interface. The current definition of the "VGA" pinout per the DDC standard is:
6
1 Red (Analog) 6 Red Return 11 Monitor ID0 (opt.) 11. . . 1
2 Green (Analog) 7 Green Return 12 Data (SDA) . . .
3 Blue (Analog) 8 Blue Return 13 Horzontal Sync . . .
4 Reserved 9 +5 VDC (frm host)* 14 Vertical Sync . . .
5 Return 10 Sync return 15 Data clock (SCL)* . . .
15 10 5
VGA DB15-S Female DB9 Female 15-pin 9-pin assignment 1 1 Red 2 2 Green 3 3 Blue 4 - Monitor ID bit 2 5 - N/C 6 6 GND (red return) 7 7 GND (green return) 8 8 GND (blue return) 9 - N/C 10 - GND 11 - Monitor ID bit 0 12 - Minitor ID bit 1 13 4 Horizontal Sync 14 5 Vertical Sync 15 - N/C Monitor ID bit 0: reserved Monitor ID bit 1: GND = mono, OPEN = color Monochrome monitors use the green signal
1 GND 6 Secondary Green Video/Intensity 2 Secondary RED Video 7 Secondary Blue Video 3 Primary RED Video 8 H Sync TTL Positive 4 Primary GREEN Video 9 V Sync TTL Negative 5 Primary BLUE Video
1 GND 6 Intensity 2 Unused 7 Unused 3 RED Video 8 H Sync TTL Positive 4 GREEN Video 9 V Sync TTL Positive 5 BLUE Video
1 GND 6 Intensity 2 Unused 7 Video 3 Unused 8 H Sync TTL Positive 4 Unused 9 V Sync TTL Negative 5 Unused
Pin-outs of that 9 pin monochrome adapter:
pin 1 ground pin 2 ground pin 3 N/C pin 4 N/C pin 5 N/C pin 6 Intensity pin 7 video pin 8 horiz sync pin 9 vert sync
The pins have the following functions:
__________________________________________ \ | \ 20 18 16 14 12 10 8 6 4 2 | (case=21) | 19 17 15 13 11 9 7 5 3 | |_______________________________________|
Personally, I think SCART connectors are dreadful things. I mean, who really wants a 20 pin monster when only about 3 or 4 are ever used in any application. But it seems they are being forced upon us!
I think most VCRs just use the composite video (in+out) and the two sound channels (in+out sterio). By the way, quite a common fault with VCRs is that the scart socket gets disconnected from the PCB inside the machine. I have fixed 2 VCRs with this problem. It is not surprising really, because the leverage on the huge plug must be quite large if you pull it out carelessly etc.
The quicher SCART dies, the better, IMHO.
(From horus@pmn.it)
Here is the SCART or EURO-AV or PeriteleVision Connector:
_____________________ Pin TV SCART
20_| o o o o o o o o o o | 2 ---- --------------------
21 o o o o o o o o o o o | 1 1 R Audio Out
`-----------------------' 2 R Audio In
3 L Audio Out
SCART (RGB & CVBS) 4 Audio GND
5 Blue GND
Video Output Level : 1 V p-p +/-2 dB 6 L Audio In
Video Output Impedance : 75 ohm 7 Blue Out
Video Frequency Range : 25Hz. - 4.8MHz 8 AV Status Out
(+/-1.5 dB) 9 Green GND
Video De-emphasis(PAL) : to CCIR 405.1 10 Not Connected
(625 lines) 11 Green Out
12 Not Connected
13 Red GND
14 Not Connected
15 Red Out/SVHS Chroma Out
16 RGB Status Out
17 Video GND
18 Ground
19 Video Out
20 Video In
21 Ground (Casing)
This is a list of the pinouts to the more common PC hardware interfaces. It is by no means complete. While I have taken care not to make any mistakes, I urge you to take caution when using these tables. Also, please keep in mind that these are only tables, they are not a guide to hardware hacking and do not attempt to explain drive capabilities, signal timings, handling care, or other interface issues. As always, make sure you know what you're doing before you start hooking wires to your PC.
5pin DIN Male DB15-S Male
--+-- ----------------------
/ ^ \ \ 1 2 3 4 5 /
| 1 3 | \ 6 7 8 9 10 /
\ 425 / \ 11 12 13 14 15 /
----- ----------------
DB9 (DE-9) Male DB15 (DA-15) Male
------------- --------------------------
\ 1 2 3 4 5 / \ 1 2 3 4 5 6 7 8 /
\ 6 7 8 9 / \ 9 10 11 12 13 14 15 /
--------- ----------------------
DB25 Male IDC-50 Male
------------------------------ -------------------
\ 1 2 3 4 5 7 8 ... 13 / | 1 3 5 7 ... 49 |
\ 14 15 16 17 18 .......25 / | 2 4 6 8 ... 50 |
-------------------------- -------------------
(Power Connector) Male
__________
/ | 4 3 2 1 |
------------
30 pin SIMM 72 pin SIMM
------------------------------- ---------------------------------------
| | | |
) | ) _ |
--|||||||||||||||||||||||||--- --|||||||||||||||/ \|||||||||||||||---
1 30 1 36 37 72
EISA/ISA/VLB
-----------------------------------------------
| (component side) |
| |
| VLB __ ISA-16bit __ ISA-8bit __|
||||||||| ||||||||||| ||||||||||||||||||| A1(front)/B1(back)
| | | | | | | | | | | | | | <-EISA
C1/D1 E1(front)/F1(back)
G1/H1
PCI Universal Card 32/64 bit
----------------------------------------------------------------
| PCI Component Side (side B) |
| |
| |
| optional |
| ____ mandatory 32-bit pins 64-bit pins _____|
|___| |||||||--|||||||||||||||||--|||||||--||||||||||||||
^ ^ ^ ^ ^ ^ ^ ^
b01 b11 b14 b49 b52 b62 b63 b94
PCI 5V Card 32/64 bit
| optional |
| ____ mandatory 32-bit pins 64-bit pins _____|
|___| ||||||||||||||||||||||||||--|||||||--||||||||||||||
PCI 3.3V Card 32/64 bit
| optional |
| ____ mandatory 32-bit pins 64-bit pins _____|
|___| |||||||--||||||||||||||||||||||||||--||||||||||||||
Power Connector Male Speaker Connector Turbo Indicator Connector pin assignment pin assignment pin assignment 1 +12V 1 -Speaker 1 +5V 2 +12V return 2 [key] 2 -High Speed 3 +5V return 3 GND 3 +5V 4 +5V 4 +Speaker +5V AT LED Power and Key Lock AT Backup Battery pin assignment pin assignment 1 LED power 1 Batt+ 2 GND 2 [key] 3 GND 3 GND 4 Key Switch 4 GND 5 GND Motherboard Power Connectors pin P8 assignment pin P9 assignment 1 Power Good 1 GND 2 +5v (or N.C.) 2 GND 3 +12v 3 -5v 4 -12v 4 +5v 5 GND 5 +5v 6 GND 6 +5v
MIDI 5pin DIN MIDI In MIDI Out pin assignment pin assignment 1 N/C 1 N/C 2 N/C 2 GND 3 N/C 3 N/C 4 Current Src 4 Current Sink 5 Current Sink 5 Current Src
Floppy Disk Controller IDC-34 Male pin assignment pin assignment 1 GND 2 Density Select 3 GND 4 (reserved) 5 GND 6 (reserved) 7 GND 8 Index 9 GND 10 Motor Enable A 11 GND 12 Drive Sel B 13 GND 14 Drive Sel A 15 GND 16 Motor Enable B 17 GND 18 Direction 19 GND 20 Step 21 GND 22 Write Data 23 GND 24 Floppy Write Enable 25 GND 26 Track 0 27 GND 28 Write Protect 29 GND 30 Read Data 31 GND 32 Head Select 33 GND 34 Disk Change
Game Port DB15-Female pin assignment pin assignment 1 +5V DC 2 Button 4 (A_PB1) 3 Position 0(A_X) 4 GND 5 GND 6 Position 1 (A_Y) 7 Button 5(A_PB2) 8 +5V DC 9 +5V DC 10 Button 6 (B_PB1) 11 Position 2(B_X) 12 GND 13 Position 3(B_Y) 14 Button 7 (B_PB2) 15 +5V DC
Serial Port DB9-Male DB25-Male 9-pin 25-pin assignment 1 8 DCD (Data Carrier Detect) 2 3 RX (Receive Data) 3 2 TX (Transmit Data) 4 20 DTR (Data Terminal Ready) 5 7 GND (Signal Ground) 6 6 DSR (Data Set Ready) 7 4 RTS (Request To Send) 8 5 CTS (Clear To Send) 9 22 RI (Ring Indicator)
Parallel Port DB25-Female
pin assignment pin assignment
1 -Strobe 2 Data 0
3 Data 1 4 Data 2
5 Data 3 6 Data 4
7 Data 5 8 Data 6
9 Data 7 10 -Ack
11 Busy 12 Paper Empty
13 Select 14 -Auto Feed
15 -Error 16 -Init
17 -Slct in 18 GND
19 GND 20 GND
21 GND 22 GND
23 GND 24 GND
25 GND
Parallel Port Centronics-36
1 -Strobe 2 Data 0
3 Data 1 4 Data 2
5 Data 3 6 Data 4
7 Data 5 8 Data 6
9 Data 7 10 -Ack
11 Busy 12 Paper Empty
13 Select 14 -Auto Feed
15 {OSCXT} 16 Signal GND
17 Frame GND 18 +5v
19 GND 20 GND
21 GND 22 GND
23 GND 24 GND
25 GND 26 GND
27 GND 28 GND
29 GND 30 GND
31 -Prime 32 -Error
33 Signal GND 34 N/C
35 N/C 36 N/C
AT Keyboard Connector 5pin-DIN pin assignment 1 CLK/CTS (open-collector) 2 RxD/TxD/RTS (open-collector) 3 Reset 4 GND 5 +5V XT Keyboard Connector 5pin-DIN pin assignment 1 CLK/CTS (open-collector) 2 Keyboard Data 3 N/C 4 GND 5 +5V
IDE Hard Disk Interface IDC-40 Male
pin assignment pin assignment
1 -Reset 2 GND
3 Data 7 4 Data 8
5 Data 6 6 Data 9
7 Data 5 8 Data 10
9 Data 4 10 Data 11
11 Data 3 12 Data 12
13 Data 2 14 Data 13
15 Data 1 16 Data 14
17 Data 0 18 Data 15
19 GND 20 Key
21 (reserved) 22 GND
23 -IOW 24 GND
25 -IOR 26 GND
27 IO Chrdy 28 Ale
29 (reserved) 30 GND
31 IRQ14 32 -IOCS16
33 Addr 1 34 (reserved)
35 Addr 0 36 Addr 2
37 -CS0 (1F0-1F7) 38 -CS1 (3f6-3f7)
39 -Active 40 GND
ESDI Hard Disk Interface IDC-34 Male, IDC-20 Male
ESDI IDC-34
pin assignment pin assignment
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
pin assignment pin assignment
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
RLL/MFM Hard Disk Interface IDC-34 Male, IDC-20 Male
RLL/MFM IDC-34
pin assignment pin assignment
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
pin assignment pin assignment
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
ISA Bus Connector EISA Bus Connector
----------------- ------------------
Back Side Component Side Back Side Component Side
pin assignment |pin assignment |pin assignment |pin assignment
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) Connector
------------------------------
Back Side Component Side Back Side Component Side
pin assignment |pin assignment |pin assignment |pin assignment
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 | |
B18 Dat28 |A18 Dat27 | |
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#
Null Modem: Connector 1 to Connector 2 DTR DSR/DCD DSR/DCD DTR RTS CTS CTS RTS TXD RXD RXD TXD GND GND
30 pin Fast Page Mode SIMM 256kx8 256kx9 1Mx8 1Mx9 4Mx8 4Mx9 pin assignment|pin assignment|pin assignment|pin assignment 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 Notes: 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 72 pin Fast Page Mode SIMM 256k/512k/1M/2M/4M/8M x 32/36 bit pin assignment|pin assignment|pin assignment|pin assignment 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 Notes: 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
SCSI Connector Pinouts (Single Ended) IDC-50 Male pin assignment|pin assignment|pin assignment|pin assignment 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 TERMPWR SCSI Connector Pinouts (Differential) IDC-50 Male pin assignment|pin assignment|pin assignment|pin assignment 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 assignment|pin assignment|pin assignment|pin assignment 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
PCI Cards Universal/3.3V/5V and 32/64 bit
pin assignment |pin assignment |pin assignment |pin assignment
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
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.
/------@@@------\ 1 HSKo Output Handshake
/ @@@ \ (Zilog 8530 DTR pin)
/ \ 2 HSKi/CLK Input Handshake OR
/ [|] [|] [|] \ External Clock
/ 8 7 6 \ 3 TxD- Transmit data (-)
| |
| | 4 Ground Signal ground
| === === === |
| 5 4 3 | 5 RxD- Receive data (-)
| |
| | 6 TxD+ Transmit data (+)
\----+ === === +----/
\@@@| 2 1 |@@@/ 7 N/C (no connection)
\@@| |@@/
\| |/ 8 RxD+ Receive data (+)
\------@@@------/
@@@
- RI ------------ NC
- DSR ------------ 1 DSR
- RTS ------------ 2 RTS
- GND ------------ 3 GND
- TxD ------------ 4 TxD
- RxD ------------ 5 RxD
- SignalGnd ------ 6 SG
- CTS ------------ 7 CTS
- DTR ------------ 8 DTR
- DCD ------------ NC
- RI ------------ NC
- DCD ------------ 1 DCD
- RTS ------------ 2 RTS
- GND ------------ 3 GND
- TxD ------------ 4 TxD
- RxD ------------ 5 RxD
- SignalGnd ------ 6 SG
- CTS ------------ 7 CTS
- DTR ------------ 8 DTR
- DSR ------------ NC Note: DSR and DCD have been swapped
- RI ------------ NC
- DSR ------------ NC
- RTS ------------ 1 RTS
- GND ------------ 2 GND
- TxD ------------ 3 TxD
- RxD ------------ 4 RxD
- SignalGnd ------ 5 SG
- CTS ------------ 6 CTS
- DTR ------------ NC
- DCD ------------ NC
- RI ------------ NC
- DSR ------------ NC
- RTS ------------ NC
- GND ------------ 1 GND
- TxD ------------ 2 TxD
- RxD ------------ 3 RxD
- SignalGnd ------ 4 SG
- CTS ------------ NC
- DTR ------------ NC
- DCD ------------ NC
SHELL (chassis gnd) ----------- 4 (chassis gnd) 2 (TxD) ----------------------- 5 (TxD) 3 (RxD) ----------------------- 6 (RxD) 4 (RTS) ----------------------- 3 (RTS) 5 (CTS) ----------------------- 8 (CTS) 6 (DSR) ----------------------- 2 (DSR) 7 (SG) ----------------------- 7 (SG) 8 (DCD) ---------------------- 10 (DCD) 20 (DTR) ---------------------- 9 (DTR) 22 (RI) ----------------------- 1 (RI)