VGA Scaler (240p) for CRT

Discussion about displays and related hardware including MiSTer filters and video settings.
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MickGyver
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VGA Scaler (240p) for CRT

Unread post by MickGyver »

Hi!

I'm trying to get a good image on my CRT using the vga scaler at 320x240p resolution. I'm currently using these settings:

video_mode=320,8,32,24,240,4,3,16,6048

The image is centered both horisontally and vertically on my CRT but the image is cropped on both the left and right sides. Could a kind soul explain what I would need to change in the video_mode parameters to get the image to fit on my CRT horisontally?
akeley
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Re: VGA Scaler (240p) for CRT

Unread post by akeley »

You mean using the scaler for VGA cores?

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MickGyver
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Re: VGA Scaler (240p) for CRT

Unread post by MickGyver »

akeley wrote: Fri Jul 17, 2020 4:39 pm You mean using the scaler for VGA cores?
In my case I want to use ScummVM on my 15KHz CRT. I managed to get a non-cropped image with these parameters (352x240px):

video_mode=352,26,34,73,240,4,3,15,7383

It's offset slightly to the right but otherwise it works great.
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Re: VGA Scaler (240p) for CRT

Unread post by akeley »

I know, I'm watching this thread since I'm very interested in this subject.

I was wondering if it'd maybe be possible to use this method to display other non-15khz cores (Atari ST, BB, etc) on 15khz TVs.

CRT SCR$ Project - building a collection of high-quality photos of CRT displays
CRT ART Books - retro-gaming books with authentic CRT photos

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