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Software Support => GroovyMAME => Topic started by: zerochad on January 09, 2019, 02:09:52 am

Title: Image slightly bouncing when movement on screen
Post by: zerochad on January 09, 2019, 02:09:52 am
Hi all,
I've managed to get my PC hooked up to my New Astro City all good, and GroovyMAME seems to be working well too. (ATI HD 7570 via DVI-I)
However I've noticed that when movement happens on the screen, the image ever so slightly bounces (both vertically and horizontally). If I leave it on a still image or don't do anything on the screen, it looks fine but as soon as movement happens, it starts doing the bouncing as mentioned before.

Actually after analysing it again, another way to describe it is that its shrinking and enlarging realllllly slightly. Its really noticeable on the edges of the screen. From what I've searched around I think it could be something to with interlacing but I'm not entirely sure where to look to start resolving the problem.

I've tried both Arcade 15hz and Generic 15hz and they both seem to be doing the same thing.

Does anyone have any idea what this might be?

Setup is
W10
HD 7570
MAME 205
Title: Re: Image slightly bouncing when movement on screen
Post by: PL1 on January 09, 2019, 03:50:32 am
Relevant consideration quoted from Calamity's sig:   ;)
Quote
Important note: posts reporting GM issues without a log will be IGNORED.
Steps to create a log:
 - From command line, run: groovymame.exe -v romname >romname.txt
 - Attach resulting romname.txt file to your post, instead or pasting it.


Scott
Title: Re: Image slightly bouncing when movement on screen
Post by: zerochad on January 09, 2019, 04:15:51 am
Sorry that's attached. I didn't do in the first place as this happens outside of GM as well (sorry should of added that to the original post as well!)
Title: Re: Image slightly bouncing when movement on screen
Post by: adder on January 10, 2019, 10:46:47 pm
just for a test if you turn your monitor brightness/contrast down really low does the bouncing effect change (eg. it bounces less?)
Title: Re: Image slightly bouncing when movement on screen
Post by: Paradroid on January 10, 2019, 11:28:59 pm
Sounds like a classic case of blooming to me. Most CRTs do this to some extent. Depends how good the HV regulation is.

Sent from my SM-G955F using Tapatalk

Title: Re: Image slightly bouncing when movement on screen
Post by: zerochad on January 13, 2019, 06:44:15 pm
just for a test if you turn your monitor brightness/contrast down really low does the bouncing effect change (eg. it bounces less?)

Apologies for the late reply!

It lowers it verrryyyy little, theres some improvement but still noticeable.
Title: Re: Image slightly bouncing when movement on screen
Post by: adder on January 13, 2019, 11:21:16 pm
are you using the stock nanao MS9 monitor?

i suppose next you will need to determine if the issue is bothersome enough to ruin your gaming experience

if it is, it might be an idea first to try to see if the monitor also behaves like that if something else is input to it, such as a console or an arcade pcb

you could try to find someone online who also runs mame using a nanao MS9, and ask them if they get the same issue.  maybe try this forum here: http://www.neo-geo.com/forums/forumdisplay.php?117-Monitors-and-Displays-Tech-Support (http://www.neo-geo.com/forums/forumdisplay.php?117-Monitors-and-Displays-Tech-Support)

if it turns out that your nanao monitor should not behave like how you have described, perhaps a capacitor kit might help, but i think the nanao monitor uses a lot of capacitors, so may be a big job to do that:  https://wiki.arcadeotaku.com/w/Nanao_MS-9_capacitor_listing (https://wiki.arcadeotaku.com/w/Nanao_MS-9_capacitor_listing)

the other option of course is to try another monitor but i know that option sucks, especially because the nanao monitor is so big in size so it might be tough and expensive to go in that direction  :-\