1. Introduction.
2. Atari ST 13-Pin DIN
Pinouts.
3. Scart Euro Connector Pinouts.
4. Level Adjusting
Resistors.
5. Atari ST to Scart Connector Wiring Assignments.
6.
References.
1.
Introduction.
================
This document discusses building a colour
RGB Scart cable for the Atari ST. It is relatively straightforward and no
more complicated than connecting the right pins together. The ST's RGB and
SYNC signals are a little high being 1v peak-to-peak such that limiting
resistors are recommended, they are not wholly necessary though to display a
picture just that it may be slightly bright.
2. Atari ST 13-Pin DIN
Pinouts.
===============================
The following is viewed from the
back of the connector, ie. solder connections;
* * *
* 4
3 2 1
* * *
* 8
7 6 5
* * *
* 12 11
10 9
*
13
1 =
Audio Output 2 =
Composite Video
3 = General Purpose
Output 4 = Monochrome Detect
5 = Audio
In
6 = Green
7 =
Red
8 = Plus 12-Volt Pullup
9 = Horizontal
Sync 10 =
Blue
11 =
Monochrome 12
= Vertical Sync
13 = GND
3. Scart Euro Connector
Pinouts.
================================
The following is viewed from the
back of the connector, ie. solder connections;
20
18 16 14 12 10 8 6
4
2
+--------------------------------------------+
\
|
\ *
* * * * *
* * * *
|
\ Male
From Behind
|
| *
* * * * *
* * * *
|
|
|
+-----------------------------------------+
19
17 15 13 11 9 7
5 3 1
1 =
Audio Output Right 2 = Audio Input
Right
3 = Audio Output
Left 4 = Audio
GND
5 = Blue
GND
6 = Audio Input Left
7 =
Blue
8 = Function Switching
9 = Green
GND 10 =
Comm Data 2
11 =
Green
12 = Comm Data 1
13 = RED/Chroma
GND 14 = Comm Data
GND
15 =
RED/Chroma 16
= Blanking
17 = VIDEO/Sync
GND 18 = Blanking
GND
19 = VIDEO/Sync
Ouput 20 = VIDEO/Sync
Input
21 = GND
4. Level Adjusting
Resistors.
=============================
Resistors of 150ohms to be placed
on the Red, Green, and Blue lines. 75ohm resistor to be placed on the
Vertical Sync to Fast Blanking line.
5. Atari ST to Scart Connector Wiring
Assignments.
==================================================
ST Signal
Name 13-Pin
DIN
Scart Scart Signal
Name
--------------
----------
----- -----------------
Audio
Output
1
2+6 Audio Input
Right+Left
Composite
Video
2
20 VIDEO/Sync
Input
Green
6
11
Green
Red
7
15 Red
Plus 12-Volt
Pullup
8
8 Function
Switching
Blue
10
7 Blue
Vertical
Sync
12
16 Fast
Blanking
GND
13
21 GND