VDP 8x16 Interlace Mode

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mickagame
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VDP 8x16 Interlace Mode

Post by mickagame » Tue May 12, 2020 8:16 am

Hello everybody.
I'm asking myself why there is not much game using 8x16 Interlace Mode?
Why developper were using 320x240 mode instead of high resolution mode available on the system (320*480)?

cero
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Re: VDP 8x16 Interlace Mode

Post by cero » Tue May 12, 2020 8:28 am

It looks bad on many TVs.

Miquel
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Re: VDP 8x16 Interlace Mode

Post by Miquel » Tue May 12, 2020 10:35 am

You need twice the memory for tiles, backgrounds and sprites alike, and there is no much to start with if you use all the others planes. So it’s a case between resolutions vs diversity, where variety is already somewhat scarce.
On lots of design questions memory is the underlying factor, today as ever.

Also 320x224 resembles more to other platforms, porting and so on.
Help. Spanish TVs are brain washing people to be hostile to me.

mickagame
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Re: VDP 8x16 Interlace Mode

Post by mickagame » Wed May 13, 2020 5:13 am

Thanks for your answers guys. It make sens.

Miquel
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Re: VDP 8x16 Interlace Mode

Post by Miquel » Thu May 14, 2020 1:32 pm

Also:
Working on 1:2 resolution is weird for graphical artist, or anyone else, I have never seen do it. Pixels are not square any more.
Doubled resolution is done by interlacing images (on different lines), not sure of the result quality on 90’s phosphor tv’s.
Help. Spanish TVs are brain washing people to be hostile to me.

TmEE co.(TM)
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Re: VDP 8x16 Interlace Mode

Post by TmEE co.(TM) » Fri May 15, 2020 10:41 am

It is good for still images, you see markedly higher detail. When things begin to move there will be various interlacing related artifacts appearing.
Here's couple experiments I made a while ago :
http://www.tmeeco.eu/SMD/HIRES.BIN
http://www.tmeeco.eu/SMD/INTERLAC.BIN
Mida sa loed ? Nagunii aru ei saa ;)
http://www.tmeeco.eu
Files of all broken links and images of mine are found here : http://www.tmeeco.eu/FileDen

danibus
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Re: VDP 8x16 Interlace Mode

Post by danibus » Sun May 17, 2020 9:36 am

TmEE co.(TM) wrote:
Fri May 15, 2020 10:41 am
It is good for still images, you see markedly higher detail. When things begin to move there will be various interlacing related artifacts appearing.
Here's couple experiments I made a while ago :
http://www.tmeeco.eu/SMD/HIRES.BIN
http://www.tmeeco.eu/SMD/INTERLAC.BIN
Very nice. Is there any post about your experiments?

TmEE co.(TM)
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Re: VDP 8x16 Interlace Mode

Post by TmEE co.(TM) » Sun May 17, 2020 11:30 am

Possibly but these are buried into past that is many years ago...
Mida sa loed ? Nagunii aru ei saa ;)
http://www.tmeeco.eu
Files of all broken links and images of mine are found here : http://www.tmeeco.eu/FileDen

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