Please help testing upcoming openMSX release!

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By ren

Paragon (1522)

ren's picture

27-08-2020, 22:54

Are you running WebMSX in Chrome? Chrome (Chromium) does a pretty good job on vsync, which WebMSX hooks onto. Firefox (a bit) less so. Interesting: https://www.vsynctester.com/

So it seems I get best (sync) performance out of openMSX when I also enable vsync at driver level (instead of leaving it on 'auto'/application controlled), but on your laptop you can't control that right? I'll have a fresh look tomorrow.

By ren

Paragon (1522)

ren's picture

29-08-2020, 11:26

So had a look.. (1080p @ 60Hz) Findings are pretty much like the last findings I posted here, so that means for me I get the best results (steady smoothness) when I turn vsync on at driver level (program 3D settings). Doesn't seem to matter then whether I have openMSX's vsync setting on or off.

But only good smoothness in FS. BUT with the net stop uxsms trick windowed becomes as smooth as FS.

So all other variations of settings vary in outcome, mostly it's a matter of being smooth for a while, then the occasional stutter, stutter may prolong a bit, becomes smooth again etc. Pausing the emulation, of ffwd a bit may help to get sync/fluidity again...

Indeed, WMSX is pretty smooth throughout. An odd thing is that in FF (Chrome is fine) it detects the native vid frequency (see browser console) as 60 Hz even when I have the display @ 50 Hz. (Should double check that with a clean FF profile.)

I might still try a custom resolution with a freq close to 59.92274340431231 Hz to see if results may improve (my 50 Hz results did seem to improve using a custom res @ 50.159 Hz ..)

@mzoran: how is blueMSX for you in this regard? You could also try RetroArch w/ the blueMSX core. That does seem to do a pretty good job keeping things synced/smooth. Audio is synced as well (not sure how openMSX handles things in this regard, I do wonder sometimes about the variation I see in the fps reported by the fps indicator) , and I couldn't seem to remedy (very) slight audio crackles (sync related?) every now & then when testing FAC IV.

Another question: do you also run a real MSX? How do you feel is the difference in input lag (on your game) between your real MSX and the various emulators? Thanks :)

By mzoran

Expert (88)

mzoran's picture

31-08-2020, 15:36

Thanks for testing. I did try on another computer with Win 10 and Catalyst drivers and created a profile for openMSX and activated vsync permanently. In full screen it does start a big chunky but settles afterwards. Since I know of now way to disable Aero on Win10 as there is no uxsms service I will just have to live with this.
Short summary: enable vsync in drivers and use same frequency on the monitor as in openMSX
use openMSX for development and excellent MSX hw support
use webMSX inside Chrome for best smoothness if you can't kill off various Windows features that affect display

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