Build Your Own Arcade Controls Forum

Software Support => GroovyMAME => Topic started by: Foxhole on February 15, 2016, 09:02:19 pm

Title: crt range per refresh rate?
Post by: Foxhole on February 15, 2016, 09:02:19 pm

Hi.
Is there a way to change the crt range for certain refresh rates?
The issue i'm facing at the moment is that games that use refresh rates between 51-59hz cause the screen to shift down.
Every refresh rate changes the vertical geometry in a different way, so at the current moment i am forced to create different crt range per each game.
For example, games that use a refresh rate between 54-54.5Hz will use a certain crt range, while games that use 58-58.5Hz will use a different crt range.
So far i've been doing this for a week, and it is increasingly exhausting.
I've tried different presets, but that didn't do any good, it's probably the tv that's causing this, and since the tv uses a digital service menu to change geometry, that creates a problem.
So, that's why i'm trying to come up with a different way to approach this.
Any help would be much appreciated.
Thanks.

Title: Re: crt range per refresh rate?
Post by: haynor666 on February 16, 2016, 01:42:15 am

The maximum comfort You can get is regulation only for vertical size so even If You set every single game You will still have to enter service menu for many games just to regulate vertical size. The best way is to leave this as it is now and regulate size and shift or set so small picture that every change will not cut picture out of TV boundaries.

Title: Re: crt range per refresh rate?
Post by: Calamity on February 16, 2016, 08:26:19 am

Quote from: Foxhole on February 15, 2016, 09:02:19 pm

Is there a way to change the crt range for certain refresh rates?

Sure. E.g.:

 crt_range0  15625-16200, 49.50-55.00, 2.000, 4.700, 8.000, 0.064, 0.192, 1.024, 0, 0, 192, 288, 448, 576
 crt_range1  15625-16200, 55.10-65.00, 2.000, 4.700, 8.000, 0.064, 0.192, 1.024, 0, 0, 192, 288, 448, 576

(obviously, changing the rest of video timings so you have 2 effective ranges where different params apply)

Title: Re: crt range per refresh rate?
Post by: Foxhole on February 16, 2016, 08:42:38 am

Quote from: Calamity on February 16, 2016, 08:26:19 am

Quote from: Foxhole on February 15, 2016, 09:02:19 pm

Is there a way to change the crt range for certain refresh rates?

Sure. E.g.:

 crt_range0  15625-16200, 49.50-55.00, 2.000, 4.700, 8.000, 0.064, 0.192, 1.024, 0, 0, 192, 288, 448, 576
 crt_range1  15625-16200, 55.10-65.00, 2.000, 4.700, 8.000, 0.064, 0.192, 1.024, 0, 0, 192, 288, 448, 576

(obviously, changing the rest of video timings so you have 2 effective ranges where different params apply)

BRILLIANT! Simply brilliant! Thank you so much!