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NFG Forums => SIG X68000 => Topic started by: gypsie on June 15, 2014, 06:18:14 PM

Title: Scanlines with X68000 on Vga CRT !
Post by: gypsie on June 15, 2014, 06:18:14 PM
Hello everybody !

Last night i ve tested something interesting : to plug a Slg3000 on my X68000 compact.

What is slg3000 ? : A scanlines generator (like a 15 khz monitor)

http://arcadeforge.net/SLG3000/Scanline-Generator-SLG3000::12.html (http://arcadeforge.net/SLG3000/Scanline-Generator-SLG3000::12.html)

So now i ve beautiful scanlines on my Vga CRT ( you can adjust scanlines density with the side plot).

Very happy to find this...





Title: Re: Scanlines with X68000 on Vga CRT !
Post by: eidis on June 15, 2014, 07:11:05 PM
 Hy Gypsie !

This looks perfect for the SEGA Dreamcast. Does it support all three X68000 modes (15kHz, 24kHz, 31kHz) ?

Keep the scene alive !
Eidis
Title: Re: Scanlines with X68000 on Vga CRT !
Post by: Neshek on June 16, 2014, 01:37:35 AM
If i'm not mistaken, SLG adds scan lines to a VGA signal. And that's it.
As VGA is 31khz..

X68000 output looks more like CGA (15/24/31)
You'd need a converter like GBS-8220 (has anyone tested it especially frequency switch?) or XPC-4 before adding SLG.

Wonder how the GBS-8220/SLG couple would behave on a x68000.
GBS is dirt cheap compared to XPC-4.
Title: Re: Scanlines with X68000 on Vga CRT !
Post by: gypsie on June 16, 2014, 01:49:40 AM
It's working only for 31 khz mode . The best games are 31 khz compatible (final fight,Ghouls and ghost,strider etc...), so slg is very good.
Title: Re: Scanlines with X68000 on Vga CRT !
Post by: gypsie on June 16, 2014, 02:18:14 AM
Screenshot comparison :

Slg3000 "off" :

(http://nsa34.casimages.com/img/2014/06/15/mini_140615062412340864.jpg) (http://www.casimages.com/img.php?i=140615062412340864.jpg)

Slg3000 "on" :

(http://nsa34.casimages.com/img/2014/06/15/mini_140615062541234995.jpg) (http://www.casimages.com/img.php?i=140615062541234995.jpg)

Title: Re: Scanlines with X68000 on Vga CRT !
Post by: Opethian on June 17, 2014, 04:02:11 AM
not bad you can get a Mini SLG from craftymech for a fraction of the cost.

another alternative http://craftymech.com/

as long as you run 640x480 or 1024x768 resolutions
Title: Scanlines with X68000 on Vga CRT !
Post by: Teddy KGB on June 17, 2014, 10:49:54 AM
Quote from: Opethian on June 17, 2014, 04:02:11 AM
not bad you can get a Mini SLG from craftymech for a fraction of the cost.

another alternative http://craftymech.com/

as long as you run 640x480 or 1024x768 resolutions

Yup Ope. Mine just arrived today and it works well with the XPC-4. Just twiddling my thumbs now till my x68k arrives later this week.

Nice and compact and the price is right.
Title: Re: Scanlines with X68000 on Vga CRT !
Post by: 98pacecar on June 17, 2014, 01:19:22 PM
This thread reminded me that I wanted to test my Hanzo Dreamcast VGA/Scanliner box in VGA mode with the X68k. I swapped out the input cable on the Hanzo for a VGA input and once I remembered that it only supports 640x480 and 1024x768, it worked like a champ. Really brings the picture on an LCD back to what it should look like.

I tested it with both 15 and 31khz inputs into an XPC-4 and it handled them just fine. Mode switches didn't cause any issues either, but I didn't suspect they would.