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Old 21 October 2020, 02:42   #21
hexaae
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Need some demo with parallax horizontal scrolling multilevel then...
But I do already notice the difference with Beast parallax on my g-sync monitor between 3.4.0b1 and 3.3.0 and before. It's minimal and a sort of random "hesitation" more than clear stuttering but is still visible paying attention to the tree or the big logo.

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Old 21 October 2020, 18:53   #22
Toni Wilen
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I'll do some nice and simple parallax effect later
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Old 23 October 2020, 10:07   #23
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Another game where you can notice it is YoJo. Super smooth scrolling up to 3.3.0, some random micro lags after 3.4.0b1
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Old 26 October 2020, 20:57   #24
Toni Wilen
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If I disable sound ("disabled but emulated"), FPS counter shows 49.9 almost always, sometimes it also shows 49.8. Do you really get 48-51 jumps without sound?

With sound enabled, it has larger jumps but it is by design to keep sound stable. (But perhaps it can be adjusted a bit..)
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Old Yesterday, 21:03   #25
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Quote:
Originally Posted by Toni Wilen View Post
If I disable sound ("disabled but emulated"), FPS counter shows 49.9 almost always, sometimes it also shows 49.8. Do you really get 48-51 jumps without sound?

With sound enabled, it has larger jumps but it is by design to keep sound stable. (But perhaps it can be adjusted a bit..)
With "Disabled" I get a smoother frame rate in the tight range of ~49.9-50.1 yes... but the problem is that in those games I still can see some rare micro-lags compared to the silky smooth parallax multi-level scrolling without a single "hiccup" of WinUAE 3.3.0. That's my only regret with recent WinUAE builds

Don't know what happened with 3.4.0b1* and after, but something in the gfx emu of any 50Hz smooth scrolling game got a little bit worse IMHO. The difference is very minimal and I have to pay attention, but I can notice it on my G-Sync monitor.

*
Quote:
Chipset updates:

- 24-bit addressing on the fly change + reset crash fixed.
- Disable AGA subpixel scrolling if odd and even plane has different subpixel scroll value, current emulation can't support it. (Worms DC and ACSYS)
- Added hack that fixes Smooth Copper part in demo Coolfridge / Upfront.
- Sprite to bitplane collision stupid optimization fixed. Fixes Jumpman Junior.
- Emulate "extreme" AGA-only bitplane DMA overrun special case, if display position is exactly right, it is possible to have overrun that does not conflict with other DMA channels (at least when disk DMA is inactive), 32/64-bit fetch mode only. Fixes game Moon Child.
- Implemented "secret" Akiko PIO mode CD command/response packet transmit/receive emulation.
- Fixed edge case where invalid word or long access (by some buggy program) to end of UAE expansion space crashed the emulation.

Last edited by hexaae; Yesterday at 21:22.
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Old Yesterday, 21:37   #26
Toni Wilen
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Quote:
Tested also with Audio: Disabled and won't change the issue
Quote:
With "Disabled" I get a smoother frame rate in the tight range of ~49.9-50.1 yes.
Huh? So sound enabled or not makes no difference or it does make a difference?

This is probably the most important detail!
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Old Yesterday, 23:30   #27
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Can improve framerate stability as you noted, but no, it won't "fix" this occasional scrolling minor-stuttering. I don't think is related to framerate numbers but more on some changed chipset emu, IMHO.

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