Build Your Own Arcade Controls Forum

Software Support => GroovyMAME => Topic started by: xbrunox on February 03, 2020, 04:33:31 pm

Title: 1080i on 25khz crt monitor?
Post by: xbrunox on February 03, 2020, 04:33:31 pm

Hi all
Sorry if this question is stupid...
Is possible install a 1080i resolution on a 25khz crt arcade monitor?

Title: Re: 1080i on 25khz crt monitor?
Post by: Substring on February 03, 2020, 05:44:14 pm

Nope. Switchres said :

Code: [Select]

$ ./switchres 1920 1080 60 --monitor arcade_25
#  1920x768@60.07 24.9600Khz
ModeLine          "1920x768x60.07" 59.304855 1920 1960 2192 2376 768 771 781 831 -HSync -VSync interlace


Title: Re: 1080i on 25khz crt monitor?
Post by: buttersoft on February 03, 2020, 11:37:25 pm

1080 (lines) x 25 (fps = 50i)  = 27kHz.

So no, even if you could squeeze the vertical blanking interval down to nothing, and you were willing to live with 50i, you'd still be over any 24kHz range limit.