PAL-Mode without scaling

Ratte · 15 October 2008, 00:25

I own a media-pc with via cl266 chipset (unichrome) connected to a normal TV.Screen-resolution is 720x576 16bit / scanline.I noticed around 10 scaling artefacts where are the scanlines are closer together eachother.Is it possible to disable this kind of screenscaling?btw.chipset driver dosnt support opengl and cpu-power is very low.(celeron 850 mhz, 512 MB memory, win xp, competition pro usb)

amiga · 15 October 2008, 17:55

@Ratte:

If your TV is a normal PAL TV, u don't need WinUAE PAL Filter
(provided your TV accepts composite input).

Toni Wilen · 16 October 2008, 08:02

It is your display card that does the scaling. WinUAE scales nothing (as long as filters are not used and aspect ratio checkbox is not ticked)

I guess only solution is to create custom resolution that has exact same resolution as "TV-out resolution".

Ratte · 16 October 2008, 09:53

I´ll take a photo this evening ...
( Some quick instructions for pic-uploading on eab, anyone? )

Graham Humphrey · 16 October 2008, 09:58

When you reply, you can click on the "Manage Attachments" button and upload your pic as an, er, attachment.

Alternatively you could use an image-hosting site such as ImageShack and copy the link it gives you to the pic into your reply.

Ratte · 16 October 2008, 20:19

Our media-pc with dualboot-config.Celeron 850 with cl266 chipset (onboard unichrom graphic) 512MB mem 200GB hdd, LG DL-DVD, cardreader, Technisat SkyStar2 sat-receiver cardRunning WinXP (SP3) from a 20GB partitionand EasyVDR 0.6 - distribution.

Ratte · 24 October 2008, 00:45

are you sure, that there is no hw-scaling?
i have to ask again, because i noticed that "windowed" indicates 568 scanlines, while fullscreen shows 576 lines.

btw.
system update: celeron 850 changed against PentiumIII-S 1,4GHz and memory changed from 512MB to 1GB
smooth entertainment ....

OddbOd · 24 October 2008, 08:57

Those could be scaling artifacts caused by the video card or interference, neither of which have anything to do with WinUAE. Try a testcard to confirm whether or not it is the graphics adapter.

Shoonay · 24 October 2008, 10:06

@Ratte: From my experience, I'm afraid it's the TV thing.
I get those lines most of the times on one TV (Spectra 21") and some of the times (mostly in NTSC mode) on other TV (Lexus 21", IIRC a Philips license/scheme build in Poland) with anything (alright, tried this only with a PlayStation and an Amiga, but this can't be the input-device doing) in AV mode.

Want to get rid of it, at least partially?
Take of your TV's back cover, take a good look at the "motherboard", find the square "screws" (technical term is... ?

), get a thin screwdriver and... tune like you've never tuned before!

It is fixable in some way, you've got to tune those three values: the contrast, the brightness and screen height.
From my experience, try to lower those three a bit.

Remember that the TV's "mobo" has some "screws" (and again, what's the tech term?

) in multiple places, sometimes assigned to do the same thing as the other, so be sure to check them all.

Pardon my lack of techno-english on this one, maybe someone actually did understand my mambo-jambo and had solved similar problems, so he/she could describe it better...

15 October 2008, 00:25	#1
Ratte Registered User Join Date: Sep 2008 Location: Germany Posts: 331	PAL-Mode without scaling I own a media-pc with via cl266 chipset (unichrome) connected to a normal TV.Screen-resolution is 720x576 16bit / scanline.I noticed around 10 scaling artefacts where are the scanlines are closer together eachother.Is it possible to disable this kind of screenscaling?btw.chipset driver dosnt support opengl and cpu-power is very low.(celeron 850 mhz, 512 MB memory, win xp, competition pro usb) Last edited by Ratte; 15 October 2008 at 00:40.

16 October 2008, 20:19	#6
Ratte Registered User Join Date: Sep 2008 Location: Germany Posts: 331	Our media-pc with dualboot-config.Celeron 850 with cl266 chipset (onboard unichrom graphic) 512MB mem 200GB hdd, LG DL-DVD, cardreader, Technisat SkyStar2 sat-receiver cardRunning WinXP (SP3) from a 20GB partitionand EasyVDR 0.6 - distribution. Last edited by Ratte; 26 November 2008 at 11:35.

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15 October 2008, 17:55	#2
amiga Registered User Join Date: Aug 2004 Location: Amiga_land Posts: 443	@Ratte: If your TV is a normal PAL TV, u don't need WinUAE PAL Filter (provided your TV accepts composite input).

16 October 2008, 08:02	#3
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,506	It is your display card that does the scaling. WinUAE scales nothing (as long as filters are not used and aspect ratio checkbox is not ticked) I guess only solution is to create custom resolution that has exact same resolution as "TV-out resolution".

16 October 2008, 09:53	#4
Ratte Registered User Join Date: Sep 2008 Location: Germany Posts: 331	I´ll take a photo this evening ... ( Some quick instructions for pic-uploading on eab, anyone? )

16 October 2008, 09:58	#5
Graham Humphrey Moderator Join Date: Jul 2004 Location: Norwich, Norfolk, UK Age: 37 Posts: 11,167	When you reply, you can click on the "Manage Attachments" button and upload your pic as an, er, attachment. Alternatively you could use an image-hosting site such as ImageShack and copy the link it gives you to the pic into your reply.

24 October 2008, 00:45	#7
Ratte Registered User Join Date: Sep 2008 Location: Germany Posts: 331	are you sure, that there is no hw-scaling? i have to ask again, because i noticed that "windowed" indicates 568 scanlines, while fullscreen shows 576 lines. btw. system update: celeron 850 changed against PentiumIII-S 1,4GHz and memory changed from 512MB to 1GB smooth entertainment ....

24 October 2008, 08:57	#8
OddbOd Registered User Join Date: Jul 2005 Location: Australia Age: 46 Posts: 666	Those could be scaling artifacts caused by the video card or interference, neither of which have anything to do with WinUAE. Try a testcard to confirm whether or not it is the graphics adapter.

24 October 2008, 10:06	#9
Shoonay Global Caturator Join Date: Aug 2004 Location: Porando Age: 43 Posts: 6,105	@Ratte: From my experience, I'm afraid it's the TV thing. I get those lines most of the times on one TV (Spectra 21") and some of the times (mostly in NTSC mode) on other TV (Lexus 21", IIRC a Philips license/scheme build in Poland) with anything (alright, tried this only with a PlayStation and an Amiga, but this can't be the input-device doing) in AV mode. Want to get rid of it, at least partially? Take of your TV's back cover, take a good look at the "motherboard", find the square "screws" (technical term is... ? ), get a thin screwdriver and... tune like you've never tuned before! It is fixable in some way, you've got to tune those three values: the contrast, the brightness and screen height. From my experience, try to lower those three a bit. Remember that the TV's "mobo" has some "screws" (and again, what's the tech term? ) in multiple places, sometimes assigned to do the same thing as the other, so be sure to check them all. Pardon my lack of techno-english on this one, maybe someone actually did understand my mambo-jambo and had solved similar problems, so he/she could describe it better...

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