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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: AndyFC on April 22, 2005, 12:02:46 PM

Title: Amiga RGB to S-Video
Post by: AndyFC on April 22, 2005, 12:02:46 PM

Hi All,

I'm having to consolidate my computers due to a big life change (my wife is pregnant with our first baby - hooray) and something I am loking at is running my DIY-towered A1200 through the TV-card of my PC - less monitor space. I've had the Amiga running trhough the PC using the composite input of the TV card but as usual it is slightly blurred and pinkish (same on the CD32 when using composite so not a one-off hardware fault). One thing I did notice through is that interlace modes are not flickery! Sadly no screenshots due to the way that PCs handle video.

Enough waffle - down to the issue: I would like to build an Amiga RGB to s-video-in (AKA S-VHS) and I cannot see what pins on the Amiga RGB output would match. Is this something that is possible or not? (I can't afford to get a dual-sync screen or LCD TV/Monitor that will take Amiga and PC inputs)

The pin-out guides I used are:
S-Video: http://www.theavguide.co.uk/svhspinout.html
Amiga RGB: http://www.ntrautanen.fi/computers/hardware/misc/amiga_rgb.htm

Thanks,
Andy

Title: Re: Amiga RGB to S-Video
Post by: Framiga on April 22, 2005, 12:55:09 PM

Hi

Amiga port, doesn't carry Y-C output.

You need an Analogic RGB+Sync (or RGB+HVsync) to YC encoder.

You could go to a cheap genlock route (with YC out) but not a good choise, if you want to play games.

Anyway, what you need, its an RGB to YC encoder.

Bye :-)

Title: Re: Amiga RGB to S-Video
Post by: JimS on April 22, 2005, 02:46:32 PM

I've seen some schematics on the internet for doing this. Try a Google search for "RGB to Y/C"

Title: Re: Amiga RGB to S-Video
Post by: Orjan on April 22, 2005, 03:22:59 PM

I saw a mod somewhere that described how you could change the A520 to deliver SVHS... Dont remember where, though.. Aminet, perhaps?

Title: Re: Amiga RGB to S-Video
Post by: AndyFC on April 22, 2005, 03:32:39 PM

Found it:
http://members.iinet.net.au/~davem2/overclock/a520.html

I may get time to have a look one day. I originally thought there may be a quick cable I could wire.

Thanks for the help.

Title: Re: Amiga RGB to S-Video
Post by: zx6r6 on April 22, 2005, 04:02:18 PM

Hello.
I spent a fortune on different convertors and tv cards for my pc and they all had a similar problem with the colours and the clarity. I tried them all (4) though both composite and s-video (via a Keene Electronics RGB scart convertor). I'm no expert but I think there must be something about the way that older equipment generates video signals that is incompatible with modern digital hardware. NONE of my c64's, spectrums, atari's etc will tune into a modern tv's or my pctv cards whereas if i plug in my gamecube,xbox or ps2 they all work great!

Anyone out there had any succes getting a 'decent' quality miggy picture out of a pctv card?

Title: Re: Amiga RGB to S-Video
Post by: JimS on April 22, 2005, 07:23:25 PM

I thought I remembered seeing this... there's a hack on Aminet to convert the A1200/A600 to Y/C.  Here's a link...
http://main.aminet.net/hard/hack/S-Video_A1200.lzh

Take a look... it's not as easy as making a cable, but a lot easier than the complete RGB to Y/C converter I saw.

-Jim

Title: Re: Amiga RGB to S-Video
Post by: delshay on April 22, 2005, 09:00:41 PM

@ANDYFC

why s-video,..RGB is better..

Title: Re: Amiga RGB to S-Video
Post by: patrik on April 22, 2005, 11:42:59 PM

@delshay:

Because video-grabber cards does generally not accept RGB, only composite and or s-video.


/Patrik