Playing GBA Core on a CRT Small Screen

pbsk8
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Playing GBA Core on a CRT Small Screen

Unread post by pbsk8 »

So now I am playing the mister on a crt 21''.

For the gba core, the image is small and centralized with black bars on top and sideways, is there a way to at least increase a bit the size image so it doesnt get too small?

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Longtime4321
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Re: Playing GBA Core on a CRT Small Screen

Unread post by Longtime4321 »

No. There isn't enough pixels on a crt to upscale the image more

groggycarpet
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Re: Playing GBA Core on a CRT Small Screen

Unread post by groggycarpet »

Try this in your ini file:

[GBA]
video_mode=320,8,32,24,240,4,3,16,6048
vga_scaler=1
vsync_adjust=2
vscale_mode=0

pbsk8
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Re: Playing GBA Core on a CRT Small Screen

Unread post by pbsk8 »

groggycarpet wrote: Tue Dec 13, 2022 8:29 pm

Try this in your ini file:

[GBA]
video_mode=320,8,32,24,240,4,3,16,6048
vga_scaler=1
vsync_adjust=2
vscale_mode=0

thanks, I tried this (I use a vga -> component cable ) and the result:

Before:

bf.jpg
bf.jpg (709.33 KiB) Viewed 162 times

After:

af.jpg
af.jpg (129.34 KiB) Viewed 162 times

It seems like the pixels quite "exploded", could it be a little less stretched not necessarily to fit all screen? Like an inch thick black bar on top and bottle and sideways I think is enough.

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Re: Playing GBA Core on a CRT Small Screen

Unread post by C-R-T »

You cannot make it look good with upscaling on a CRT TV. It's either 1:1 or garbage, your choice. You'll need a high resolution LCD screen in order to upscale it and have it look good at the same time.

softtest9
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Re: Playing GBA Core on a CRT Small Screen

Unread post by softtest9 »

You can do a clean 3x integer scale to 720x480. This could theoretically work well on a CRT in interlaced (480i) mode. I'm not sure whether interlaced is supported or not in MiSTer.

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Re: Playing GBA Core on a CRT Small Screen

Unread post by FoxbatStargazer »

The scaler does not support interlaced mode, so it's not going to be an option for SD TV. You have a lot of options with something like a VGA CRT though.

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Re: Playing GBA Core on a CRT Small Screen

Unread post by Pepeart »

Can I make the screen bigger on my sony pvm? It has 800 lines of resolution and can do the following resolutions.
480/60i, 575/50i, 1035/60i, 1080/50i, 1080/60i, and 720/60p.
Thank you in advance

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Re: Playing GBA Core on a CRT Small Screen

Unread post by FoxbatStargazer »

Sounds like 720p (mode 0) might work at least. Use that with vga_scaler or turn off direct_video depending on how you connect.

pbsk8
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Re: Playing GBA Core on a CRT Small Screen

Unread post by pbsk8 »

Pepeart wrote: Tue Dec 20, 2022 2:31 am

Can I make the screen bigger on my sony pvm? It has 800 lines of resolution and can do the following resolutions.
480/60i, 575/50i, 1035/60i, 1080/50i, 1080/60i, and 720/60p.
Thank you in advance

how can I find out what resolutions my crt wega trinitron can display?

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Re: Playing GBA Core on a CRT Small Screen

Unread post by jd213 »

Pepeart wrote: Tue Dec 20, 2022 2:31 am

Can I make the screen bigger on my sony pvm? It has 800 lines of resolution and can do the following resolutions.
480/60i, 575/50i, 1035/60i, 1080/50i, 1080/60i, and 720/60p.
Thank you in advance

That PVM will most likely force a letterbox image when it receives an HD signal, unfortunately.

When feeding it 240p or 480p you can use the service menu to increase the H and V size to zoom in, but this will result in some annoying reflections from inside the tube if it's like my 20L5.
Edit: The H and V blanking (BLK or something like that) in the service menu can help reduce the reflections but I've never been able to get rid of them completely, but it usually only shows up in some graphics

My 1998 widescreen consumer Trinitron from Japan has a zoom mode that is almost perfect for GBA, fills about 85% of the screen. For some reason a Game Boy Player + GBI at 240p fills the screen a bit more, though. I don't think GBI is zooming the picture, at any rate.

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