Custom Resolution Utility (CRU)

[apeezyfosheezy]

(08-06-2022 06:40 PM)ToastyX Wrote:  

(08-05-2022 10:08 AM)apeezyfosheezy Wrote:  Hi there, I get this white box when I try to use 320x240 in CRU on a CRT TV with crt emudriver on a radeon hd 5450 via hdmi to component video and I have no idea why.

Please see attached pictures showing the issue and my CRU values.

I’m a total newbie at this so I am learning as I go! I have no idea how to get rid of it as I’ve tried adjusting about every setting. Is there any way to fix this or am I going about this all wrong?

Also I do have a working super resolution for 2560x240 but I also need 320x240 for something that just won’t play nice with super resolutions.

The problem is a VGA standard 320x240 would need to be quadruple-clocked or double-clocked with double-scanning to make the pixel clock 25.175 MHz, but there's no way to create such resolutions in Windows. 2560x240 emulates 8x clocking but that distorts the aspect ratio as you've seen. Have you tried a large amount of blanking, such as making the totals 800x525? If that doesn't help, then 640x480 with integer scaling would be the best compromise.

Well I gave it a try but then saw it put it to 31.5 khz. My tv is standard definition so I ended up getting a double image (see attached picture) and cannot use 640x480 progressive (if that’s what you meant). Can I still use this method on my tv with different values? I’m guessing I’d need to keep it within the 15khz range?

Thanks so much for taking a look into my issue I really appreciate it.