Welcome ======= This document is for those who can: 1) Handle a soldering Iron. 2) Live on a low budget or don't like spending money. 3) Can't get the following cables where you live. Intro ===== I will first give the pin out diagram's for the ST monitor port and then the VGA monitor cable connector. Following this will be the cable wiring diagram's. The information within may NOT be reproduced or modified without the permission of me Simon J Churchill as I own the Copyright, (C) S J Churchill, Oct 1995. Permission is given to individual user's to print this information for reference in construction. Also the following Publication's are granted use of the information within: STReport, AEO and Atari World with internal componant magazines. These publication's are also granted editing right's as necessary. (Like removing all my spelling mistakes. 8-) But first a few words of caution, BE CAREFUL! That's it, you are on your own, I will NOT be liable or held responsable for your action's when using the following data. You attempt making these cables at your own risk and any damage incured is your own problem. Sorry but I have to put this in, As an Electrical/Electronics Engineer I know what I can do but I don't know what your Skills/ Abilities are. But I will wish you good luck. And remember the mono cables is for ALL standard VGA/SVGA monitor's the COLOUR cable is for SOME (Very few) SVGA monitor's. (I'll explaine later with the cable) The Diagram's ============= ST Monitor Connector -------------------- The following diagram is from the rear of a 13 Pin Din connector. (The side you will be soldering on) _____________________ / |_| \ / \ / \ / 4 O O O O 1 \ | | | | | 8 O O O O 5 | | | | | \ 12 O O O O 9 / \ / \ 13 O / \_____________________/ Conections ---------- Pin Comment 1 - Audio Out 2 - Composite Video (Where Applicable) 3 - General Purpose Output 4 - Monochrome Detect 5 - Audio Ground 6 - Green 7 - Red 8 - Plus 12-Volt Pullup (Not used) 9 - Horizontal Sync 10 - Blue 11 - Monochrome 12 - Vertical Sync 13 - Ground VGA/SVGA Monitor Connector -------------------------- The following diagram is from the rear of a 15 way Female Hi-Density 'D' Type connector. (The monitor cable will connect to this socket, View from solder side) __________________________________________________ \ / 1 \ O O O O O O / 5 \ / 6 \ O O O O O O / 10 \ / 11 \ O O O O O O / 15 \____________________________________/ Connection's ------------ The following connection's are for a standard VGA/SVGA Monitor, Please CHECK with your monitor manual that they are the same. (THAT'S 100% THE SAME) If you find a difference then change the wiring number's if you can. If you can not make a change DO NOT MAKE A CABLE, Your equipment may be damaged if you attempt a bodge job!! You have been warned. N/C = Not Connected. Pin Comment 1 - Red 2 - Green 3 - Blue 4 - Ground 5 - N/C 6 - Red Ground 7 - Green Ground 8 - Blue Ground 9 - N/C or No pin fitted 10 - Sync Ground - N/C 11 - ID bit 0 - Ground - N/C 12 - ID bit 1 - N/C 13 - Horizontal Sync 14 - Vertical Sync 15 - N/C The Cable Wiring ================ Intro for Mono -------------- Where possable use Screen 7/0.2 cable, this will make soldering easy on the VGA Socket. Also use small rubber sleaves to cover your solder joint's. Some Tin Copper wire will also be needed for making link's, or use a long leg cut from a resistor. This can be used on ALL standard VGA and SVGA monitor's. The 4700 Ohme Resistor is optional, it is used to limit the current from the ST, component damage may be incured if it's left out when using an older monitor. A new SVGA monitor should not require it. Here is where you will understand why I have given you the connector diagram's above. The reason was to make the following as clear as mud, on the left we have the ST 13 Pin Din connector wiring numbers leading to the right VGA connector wiring numbers. All you have to do is make connection (a) on the ST side connect to the connection (b) on the VGA side and your half way there, don't forget the link's and your done. Check for cross connection's etc. The MONO Wiring Diagram ----------------------- 13 Pin Din Connector VGA/SVGA Female 15 way 'D' 11 ---------[ 4700R ]-----------------+---- 1 | ^ Resistor +---- 2 | +---- 3 4 ----+------------------------------+---- 4 | | 13 ----+ | 5 | +---- 6 | +---- 7 | +---- 8 | | 9 | +---- 10 | +---- 11 12 9 ---------------------------------------- 13 12 ---------------------------------------- 14 15 Intro for Colour ---------------- Where possable use Screen 7/0.2 cable, this will make soldering easy on the VGA Socket. Also use small rubber sleaves to cover your solder joint's. Some Tin Copper wire will also be needed for making link's, or use a long leg cut from a resistor. THIS IS A MAJOR WARNING: DO NOT USE ON A STANDARD VGA/SVGA MONITOR!! Check in your monitor's manual that your monitor is capable of operating at a Horizontal Rate of 15Khz. If your manual say's it is capable of 30-40Khz DO NOT MAKE THIS CABLE. If your manual say's it is capable of 15-30Khz or 15-40Khz then your monitor has extra low frequency syncing and colour is possable. If you are unshore in any way DON'T MAKE IT. Here is where you will understand why I have given you the connector diagram's above. The reason was to make the following as clear as mud, on the left we have the ST 13 Pin Din connector wiring numbers leading to the right VGA connector wiring numbers. All you have to do is make connection (a) on the ST side connect to the connection (b) on the VGA side and your half way there, don't forget the link's and your done. Check for cross connection's etc. The Colour Wiring Diagram ------------------------- 13 Pin Din Connector VGA/SVGA Female 15 way 'D' 7 ---------------------------------------- 1 6 ---------------------------------------- 2 10 ---------------------------------------- 3 13 -----------------------------------+---- 4 | | 5 | +---- 6 | +---- 7 | +---- 8 | | 9 | +---- 10 | +---- 11 12 9 ---------------------------------------- 13 12 ---------------------------------------- 14 15 The End ======= At the time of writing the above was correct (I Think) If any problem's are found then please contact me if I'm still on line. Have fun making your cables and good luck in getting them to work. For those who are more adventerouse try adding an Audio out signal to a Hi Fi or Power Speaker's by connecting to pins 1 and 5 of the ST's 13 Pin connector. This is a Mono Audio Signal and you may need to wire the signal to two connector's to give mono stereo! For those who have a Mutlie-frequency monitor it is possable to use a 2 position 4 way switch. I have one pre-design already fitted to my system and I think the following will do what's required so that the monitor can be used in both Mono and Colour modes at the flick of a switch: The Mono/Colour Wiring Diagram ------------------------------ 13 Pin Din Connector VGA/SVGA Female 15 way 'D' 7 --------------------+ +------------- 1 | | 6 --------------+ | | +----------- 2 | | | | 10 --------+ | | | | +--------- 3 | | | | | | 13 -----+ | | | | | | | | | | | | | +---- 4 Mono \ | | | | | | | | \ +--O--|--O-----O-----O--+ | | | | 5 /|\ \ | | | | | | | | \| | +-----+ | | +---- 6 | Switch | O--+ O--+ O--+ O | | | | | /| | | +----------+ | +---- 7 \|/ / | | +------------------+ | / +--O--|--O-----O-----O--+ +---- 8 Colour / | | | | | | 4 --+ | +-----+-----+ | 9 | | | +--|--------------------------+---- 10 | \ | 11 -[4700]-+ (Not connected) +---- 11 12 9 ---------------------------------------- 13 12 ---------------------------------------- 14 15 There you go, that's some rare info, it should work without trouble. If you are using high res but would like to look at a screen that's say green and black, remove one of the colour wires RGB from the VGA connector. Just remember over a long period of time with one gun unsed it may become more or less powerful compared to the other two colour gun's which may give you a funny coloured picture if you were to use the monitor with a PC again. Have fun. (C) S J Churchill, Oct 1995.