60 or 59.94 Hz for NTSC?

Rotareneg · 20 March 2018, 18:48

I was just curious if there was any reason to use a display refresh rate of 59.94 Hz instead of 60 Hz with WinUAE, or I guess more directly, which frame rate does WinUAE want to use in NTSC mode?

Toni Wilen · 21 March 2018, 14:15

It should not make any noticeably difference, except of course very tiny speed difference, that is invisible to running Amiga software = won't affect compatibility. 60Hz probably is better in normal vsync mode. Low latency vsync attempts to find exact rate but it is only supported in D3D9 mode.

Note that only interlace mode matches standard PAL/NTSC frame rate. Normal non-interlace mode is slightly slower. (~59.8Hz or so)

EDIT: Future "sliced" low latency mode probably changes everything.. (https://www.blurbusters.com/blur-bus...or-developers/)

20 March 2018, 18:48	#1
Rotareneg Registered User Join Date: Sep 2017 Location: Kansas, USA Posts: 328	60 or 59.94 Hz for NTSC? I was just curious if there was any reason to use a display refresh rate of 59.94 Hz instead of 60 Hz with WinUAE, or I guess more directly, which frame rate does WinUAE want to use in NTSC mode?

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21 March 2018, 14:15	#2
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,540	It should not make any noticeably difference, except of course very tiny speed difference, that is invisible to running Amiga software = won't affect compatibility. 60Hz probably is better in normal vsync mode. Low latency vsync attempts to find exact rate but it is only supported in D3D9 mode. Note that only interlace mode matches standard PAL/NTSC frame rate. Normal non-interlace mode is slightly slower. (~59.8Hz or so) EDIT: Future "sliced" low latency mode probably changes everything.. (https://www.blurbusters.com/blur-bus...or-developers/)

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