Build Your Own Arcade Controls Forum

Software Support => GroovyMAME => Topic started by: ID4 on April 30, 2015, 05:16:04 am

Title: Preset for CRT TV (1080i, 480p and 576p)
Post by: ID4 on April 30, 2015, 05:16:04 am

Hi

I have an CRT that workd at 1080i, 480p and 576p.

What can be the crt_range for this CRT?

Thanks!

Title: Re: Preset for CRT TV (1080i, 480p and 576p)
Post by: Calamity on April 30, 2015, 07:57:46 am

Hi ID4,

Assuming it's 576p@50 Hz (31kHz), you can just take the arcade_31:

crt_range0  31400-31500, 49.50-65.00, 0.940, 3.770, 1.890, 0.349, 0.064, 1.017, 0, 0, 400, 512, 0, 0

...and do these changes:

crt_range0  31400-31500, 49.50-65.00, 0.940, 3.770, 1.890, 0.349, 0.064, 1.017, 0, 0, 400, 576, 800, 1152

(yes, it will handle 1152i@50Hz too)

Title: Re: Preset for CRT TV (1080i, 480p and 576p)
Post by: ID4 on May 01, 2015, 04:36:26 am

Quote from: Calamity on April 30, 2015, 07:57:46 am

Hi ID4,

Assuming it's 576p@50 Hz (31kHz), you can just take the arcade_31:

crt_range0  31400-31500, 49.50-65.00, 0.940, 3.770, 1.890, 0.349, 0.064, 1.017, 0, 0, 400, 512, 0, 0

...and do these changes:

crt_range0  31400-31500, 49.50-65.00, 0.940, 3.770, 1.890, 0.349, 0.064, 1.017, 0, 0, 400, 576, 800, 1152

(yes, it will handle 1152i@50Hz too)

Hi Calamity!

Thanks you! Really it supports 50 and 60 Hz modes at 1080i. 480p and 576p are supported too as I said.

This CRT supports 576i and 480i too, but it scales to progressive so quality is lost.

Title: Re: Preset for CRT TV (1080i, 480p and 576p)
Post by: Calamity on May 01, 2015, 02:25:19 pm

Quote from: ID4 on May 01, 2015, 04:36:26 am

Thanks you! Really it supports 50 and 60 Hz modes at 1080i. 480p and 576p are supported too as I said.

If you want 1080i@ at 60 Hz you'll need to increase HfreqMax a bit in that crt_range.

Quote

This CRT supports 576i and 480i too, but it scales to progressive so quality is lost.

Yeah that's because it the TV works at 31 kHz natively so it needs to upscale 15 kHz signals.

Title: Re: Preset for CRT TV (1080i, 480p and 576p)
Post by: ID4 on May 02, 2015, 12:14:45 pm

Quote

Yeah that's because it the TV works at 31 kHz natively so it needs to upscale 15 kHz signals.

I know It, thanks you Calamity, please take a look to you gmail account.