Dec 122017
 
Specs on lots of different PC cables.

Full Description of File


This is text and diagrams on making your own
PC Cables. Virtually any cable you want is
addressed here.


File PCCABLE3.ZIP from The Programmer’s Corner in
Category Tutorials + Patches
Specs on lots of different PC cables.
File Name File Size Zip Size Zip Type
CABLES1.TXT 18723 4265 deflated
CABLES2.TXT 12648 3446 deflated
CABLES3.TXT 212 152 deflated
FILE_ID.DIZ 108 94 deflated

Download File PCCABLE3.ZIP Here

Contents of the CABLES1.TXT file


QUICK GUIDE TO COMPUTER CABLES

by Bill Becwar

LEGAL STUFF - This guide is as complete and accurate as I can make
it, however, I can't be responsible for errors, omissions, typing
mistakes, bad downloads, or your dog biting you. I know that
somebody, somewhere is going to cross a wire. Best advice if you
want to build one of these cables: Complete the wiring all in one
work session. Then check the connections, preferably with an
ohmmeter. Go away for a while and do something else, then return
and CHECK the connections again. If you have any comments or find
any errors, leave E-Mail to William Becwar on EXEC-PC, the largest
and finest BBS in the country, (414) 789-4210, or on CompuServe
72060,251. Good Luck!



POWER SUPPLY CONNECTORS -

Typical Power Supply has 6 Connectors: 2 ea. - 6 pin for
Motherboard Power and 4 ea. - 4 pin for Disk Drive Power.


Motherboard Power Connectors
P8 P9
Pin Signal Pin Signal
----------------------------- ---------------------------
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


Disk Drive Power Connectors (4 - 4 pin)

Pin Signal
-----------------------------
1 - +12v
2 - GND
3 - GND
4 - +5v



MOTHERBOARD CONNECTORS -

Motherboards have various combinations of connectors depending
on design type and built-in facilities. These will be found in a
typical clone.


Backup Battery Connector (AT only)

Pin Signal
-----------------------------
1 - Batt+
2 - [KEY]
3 - GND
4 - GND


LED Power and Key Lock (AT only)

Pin Signal
-----------------------------
1 - LED power
2 - GND
3 - GND
4 - Key Switch
5 - GND


Speaker Connector

Pin Signal
-----------------------------
1 - -Speaker
2 - [KEY]
3 - GND
4 - +Speaker +5v


Turbo Indicator Connector

Used only on Turbo switchable machines. Safest Connector on
the machines that have it; can't be connected backwards!

Pin Signal
-----------------------------
1 - +5v
2 - *HIGH SPEED
3 - +5v


MOTHERBOARD I/O CARD EXPANSION SLOTS

Not exactly for cabling, but a good reference anyway.

8-bit slots (PC/XT/AT)

COMPONENT SIDE NON-COMPONENT SIDE

Pin Signal Pin Signal
--------------- ---------------
A1 -I/O CH CLK B1 GND
A2 SD7 B2 RESET DRV
A3 SD6 B3 +5v
A4 SD5 B4 IRQ 9
A5 SD4 B5 -5v
A6 SD3 B6 DRQ 2
A7 SD2 B7 -12v
A8 SD1 B8 Reserved / OWS
A9 SD0 B9 +12v
A10 -I/O CH RDY B10 GND
A11 AEN B11 -SMEMW
A12 SA19 B12 -SMEMR
A13 SA18 B13 -IOW
A14 SA17 B14 -IOR
A15 SA16 B15 -DACK3
A16 SA15 B16 DRQ3
A17 SA14 B17 -DACK1
A18 SA13 B18 DRQ1
A19 SA12 B19 -REFRESH
A20 SA11 B20 CLK
A21 SA10 B21 IRQ7
A22 SA9 B22 IRQ6
A23 SA8 B23 IRQ5
A24 SA7 B24 IRQ4
A25 SA6 B25 IRQ3
A26 SA5 B26 -DACK2
A27 SA4 B27 T/C
A28 SA3 B28 BALE
A29 SA2 B29 +5v
A30 SA1 B30 OSC
A31 SA0 B31 GND


Motherbaord Expansion slots continued...

16-bit Slots (AT only)

COMPONENT SIDE NON-COMPONENT SIDE

Pin Signal Pin Signal
--------------- ---------------
C1 SBHE D1 -MEM CS16
C2 LA23 D2 -I/O CS16
C3 LA22 D3 IRQ10
C4 LA21 D4 IRQ11
C5 LA20 D5 IRQ12
C6 LA19 D6 IRQ13
C7 LA18 D7 IRQ14
C8 LA17 D8 -DACK0
C9 -MEMR D9 DRQ0
C10 -MEMW D10 -DACK5
C11 SD08 D11 DRQ5
C12 SD09 D12 -DACK6
C13 SD10 D13 DRQ6
C14 SD11 D14 -DACK7
C15 SD12 D15 DRQ7
C16 SD13 D16 +5v
C17 SD14 D17 -MASTER
C18 SD15 D18 GND



Keyboard Connector

Pin Signal
-----------------------------
1 - KBD CLK OUT
2 - KBD SERIAL OUT
3 - KBD RESET IN
4 - KBD GND
5 - KBD +5v




FLOPPY DISK CABLES -

Floppy / Hard Drive Power Connectors

Pin Signal
-----------------------------
1 - +12v
2 - GND
3 - GND
4 - +5v

Floppy Disk Drive Interface Cable

Pin Signal Pin Signal
-------------------------------------------------------------
1 - GND 2 - N/C
3 - GND 4 - N/C
5 - GND 6 - N/C
7 - GND 8 - Index
9 - GND 10 - Motor Enable A
11 - GND 12 - Drive Select B
13 - GND 14 - Drive Select A
15 - GND 16 - Motor Enable B
17 - GND 18 - Stepper Direction
19 - GND 20 - Step Pulse
21 - GND 22 - Write Data
23 - GND 24 - Write Enable
25 - GND 26 - Track 0
27 - GND 28 - Write Protect
29 - GND 30 - Read Data
31 - GND 32 - Select Head 1
33 - GND 34 - (Spare)



HARD DISK CABLES -

ST-506 Hard Disk Drive Control/Data Cables


Floppy / Hard Drive Power Connectors

Pin Signal
-----------------------------
1 - +12v
2 - GND
3 - GND
4 - +5v


ST-506 Control Cable

Pin Signal Pin Signal
-------------------------------------------------------------
1 - Head Select 8 2 - GND
3 - Head Select 4 4 - GND
5 - Write Gate 6 - GND
7 - Seek Complete 8 - GND
9 - Track 0 10 - GND
11 - Write Default 12 - GND
13 - Head Select 1 14 - GND
15 - Reserved 16 - GND
17 - Head Select 2 18 - GND
19 - Index 20 - GND
21 - Ready 22 - GND
23 - Step 24 - GND
25 - Drive Select 1 26 - GND
27 - Drive Select 2 28 - GND
29 - Drive Select 3 30 - GND
31 - Drive Select 4 32 - GND
33 - Direction In 34 - GND

ST-506 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 - GND
11 - GND 12 - GND
13 - MFM Write Data+ 14 - MFM Write Data-
15 - GND 16 - GND
17 - MFM Read Data+ 18 - MFM Read Data-
19 - GND 20 - GND


ESDI Hard Disk Drive Control/Data Cables

ESDI Control Cable

Pin Signal Pin Signal
-------------------------------------------------------------
1 - Head Select 3 2 - GND
3 - Head Select 2 4 - GND
5 - Write Gate 6 - GND
7 - Config/Status Data 8 - GND
9 - Transfer Ack. 10 - GND
11 - Attention 12 - GND
13 - Head Select 0 14 - GND
15 - Sec/Addr Mark Find 16 - GND
17 - Head Select 1 18 - GND
19 - Index 20 - GND
21 - Ready 22 - GND
23 - Transfer Request 24 - GND
25 - Drive Select 1 26 - GND
27 - Drive Select 2 28 - GND
29 - Drive Select 3 30 - GND
31 - Read Gate 32 - GND
33 - Command Data 34 - GND

ESDI Data Cable

Pin Signal Pin Signal
-------------------------------------------------------------
1 - Drive Selected 2 - Sec/Addr Mark Found
3 - Seek Completed 4 - Address Mark Enable
5 - Reserved/Step Mode 6 - GND
7 - Write Clock+ 8 - Write Clock-
9 - Cartridge Changed 10 - Read Ref. Clock+
11 - Read Ref. Clock- 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 - Index


SCSI Hard Disk Drive Interface Cable

Pin Signal Pin Signal
-------------------------------------------------------------
1 - GND 2 - Data Line 0
3 - GND 4 - Data Line 1
5 - GND 6 - Data Line 2
7 - GND 8 - Data Line 3
9 - GND 10 - Data Line 4
11 - GND 12 - Data Line 5
13 - GND 14 - Data Line 6
15 - GND 16 - Data Line 7
17 - GND 18 - Data Parity Line
19 - GND 20 - GND
21 - GND 22 - GND
23 - GND 24 - GND
25 - N/C 26 - Terminator Power
27 - GND 28 - GND
29 - GND 30 - GND
31 - GND 32 - Attention
33 - GND 34 - GND
35 - GND 36 - Busy
37 - GND 38 - Acknowledge
39 - GND 40 - Reset
41 - GND 42 - Message
43 - GND 44 - Select
45 - GND 46 - C/D
47 - GND 48 - Request
49 - GND 50 - I/O



DISPLAY ADAPTOR CONNECTORS -


Monochrome (MDA), Hercules, Color (CGA) Adaptors
Connector type - DB-9

Pin Signal Pin Signal
-------------------------------------------------------------------
1 GND 6 Intensity
2 GND 7 Video *
3 N/C or RED 8 Horizontal Drive
4 N/C or GREEN 9 Vertical Drive
5 N/C or BLUE

* NTSC Video on some clone boards


EGA Adaptor
Connector Type - DB-9

Pin Signal Pin Signal
-------------------------------------------------------------------
1 GND 6 Secondary Green / Intensity
2 Secondary Red 7 Secondary Blue / Mono Video
3 Primary Red 8 Horizontal Drive
4 Primary Green 9 Vertical Drive
5 Primary Blue


VGA Adaptor
Connector Type - DB-15

Pin Signal Pin Signal
-------------------------------------------------------------------
1 Red Video 9 [KEY]
2 Green Video 10 Sync GND
3 Blue Video 11 Monitor ID - Bit 1
4 - Monitor ID - Bit 2 12 Monitor ID - Bit 0
5 - GND 13 Horizontal Sync
6 - Red GND 14 Vertical Sync
7 - Green GND 15 N/C (Reserved)
8 - Blue GND



PARALLEL PRINTER PORT

I/O Mapping
--------------------------
LPT1: $378-37A
LPT2: $278-27A

DB-25 Connector (Computer End)

Pin Signal Pin Signal
-------------------------------------------------------------------
1 *STROBE 14 *Auto Feed
2 Data Bit 0 15 *Error
3 Data Bit 1 16 *Initialize Printer
4 Data Bit 2 17 *Select Input
5 Data Bit 3 18 GND
6 Data Bit 4 19 GND

7 Data Bit 5 20 GND
8 Data Bit 6 21 GND
9 Data Bit 7 22 GND
10 *Acknowledge 23 GND
11 Busy 24 GND
12 Paper Out 25 GND
13 Select


Centronics 36 pin Connector (Printer End)

Pin Signal Pin Signal
-------------------------------------------------------------------
1 *STROBE 19 GND
2 Data Bit 0 20 GND
3 Data Bit 1 21 GND
4 Data Bit 2 22 GND
5 Data Bit 3 23 GND
6 Data Bit 4 24 GND
7 Data Bit 5 25 GND
8 Data Bit 6 26 GND
9 Data Bit 7 27 GND
10 *Acknowledge 28 GND
11 Busy 29 GND
12 Paper Out 30 GND
13 Select 31 *Prime
14 *Auto Feed XT 32 *Error
15 {OSCXT} 33 Signal GND
16 Signal GND 34 N/C
17 Frame GND 35 N/C
18 +5v 36 N/C



SERIAL PORTS

NOTE: The IBM PC uses a DTE (Data Terminal Equipment) Connection
standard. Most Modems are DCE (Data Communication Equipment).


I/O Map
-----------------------------
COM1: $3F8-3FF
COM2: $2F8-2FF
COM3: $3E8-3EF
COM4: $2E8-2EF


DB-9 Connector

Pin Signal Pin Signal
-------------------------------------------------------------------
1 CD Carrier Detect 6 DSR Data Set Ready
2 RXD Receive Data 7 RTS Request to Send
3 TXD Transmit Data 8 CTS Clear to Send
4 DTR Data Term. Ready 9 RI Ring Indicator
5 GND Signal GND


DB-25 Connector

Pin Signal Pin Signal
-------------------------------------------------------------------
1 GND Ground / Shield 14 {2nd TXD}
2 TXD Transmit Data 15 Transmit Clock
3 RXD Received Data 16 {2nd Rec. Clock}
4 RTS Request to Send 17 {Receive Clock}
5 CTS Clear to Send 18 {Unassigned}
6 DSR Data Set Ready 19 {2nd RTS}
7 GND Ground 20 DTR Data Term Ready
8 DCD Carrier Detect 21 {Sig. Quality}
9 {Reserved} 22 RI Ring Indicator
10 {Reserved} 23 {Data Rate Sel.}
11 {Unassigned} 24 {Transmit Clock}
12 {2nd CD} 25 {Unassigned}
13 {2nd CTS}



NULL MODEM CONNECTION-

RS-232 Definition Computer/Terminal Modem
Signal DTE DCE
9-pin 25-pin 25-pin
-------------------------------------------------------------------
GND Signal GND 5 1 1
TXD Transmit Data 3 2 3
RXD Receive Data 2 3 2
RTS Req. to Send 7 4 5
CTS Clear to Send 8 5 4
DSR Data Set Ready 6 6 20
GND Chassis GND - 7 7
CD Carrier Detect 1 8 8
DTR Data Term. Ready 4 20 6


DTE DCE

1 1

2 2

3 3

4 4

5 5

6 6

7 7

8 8

20 20



GAME CONNECTOR

DB-15 Connector

Pin Signal Pin Signal
-------------------------------------------------------------------
1 +5v 9 +5v
2 Button 1-1 10 Button 2-1
3 X1 11 X2
4 GND 12 GND
5 GND 13 Y2
6 Y1 14 Button 2-2
7 Button 1-2 15 N/C
8 N/C


Buttons - Connect from GND to Button inputs
X and Y pots connect from +5v to X-Y inputs.



JOYSTICK CONNECTOR

DB-9 Connector

Pin Signal Pin Signal
-------------------------------------------------------------------
1 JOY0 6 Fire Button
2 JOY1 7 +5v
3 JOY2 8 GND
4 JOY3 9 POT X
5 POT Y



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