English Amiga Board - View Single Post - Built my own: Amiga RGB to S-Video + composite adaptor small issue though...

Zetr0 · 07 January 2011, 04:51

@Walter

Sorry, I have to admit I am a little confused - you say you have been using this on the Atari 1040STE?

Video Pin-Out

1 - NC - *Audio Out
2 - Composite Video
3 - NC - GPO
4 - M detect (if low *grounded* ST enters Hires Monocrome video mode)
5 - NC - *Audio In
6 - Green
7 - Red
8 - +12V (520ST has GND here)
9 - Hsync - Horiz sync
10 - Blue
11 - NC - Monocrome Video
12 - Vsync - Vertical Sync
13 - Ground

Where are you sourcing your +5v ?

Are you sure you are outputting 60Hz refresh and not 50Hz Vertical refresh?

heres an alternative to an external SVideo output - should the 1040STe have a modulator then you can source the Chroma and Luma from there

here is how to do it

also might be relevant is this link Alexh put up a while back; an Atari ST SVideo Adapter - it still needs a little work but have a look it might help.

I will say that it does sound that either

1. the video signal is IN mono mode
2. the colour clock is no functioning properly (oscillator and or Ad724 setting)

Good luck with your investigations, let us know how you get on =)

07 January 2011, 04:51	#12
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	@Walter Sorry, I have to admit I am a little confused - you say you have been using this on the Atari 1040STE? Video Pin-Out 1 - NC - Audio Out 2 - Composite Video* 3 - NC - GPO 4 - M detect (if low grounded ST enters Hires Monocrome video mode) 5 - NC - Audio In 6 - Green* 7 - Red 8 - +12V (520ST has GND here) 9 - Hsync - Horiz sync 10 - Blue 11 - NC - Monocrome Video 12 - Vsync - Vertical Sync 13 - Ground Where are you sourcing your +5v ? Are you sure you are outputting 60Hz refresh and not 50Hz Vertical refresh? heres an alternative to an external SVideo output - should the 1040STe have a modulator then you can source the Chroma and Luma from there here is how to do it also might be relevant is this link Alexh put up a while back; an Atari ST SVideo Adapter - it still needs a little work but have a look it might help. I will say that it does sound that either 1. the video signal is IN mono mode 2. the colour clock is no functioning properly (oscillator and or Ad724 setting) Good luck with your investigations, let us know how you get on =)