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VDP 8x16 Interlace Mode
Posted: Tue May 12, 2020 8:16 am
by mickagame
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)?
Re: VDP 8x16 Interlace Mode
Posted: Tue May 12, 2020 8:28 am
by cero
It looks bad on many TVs.
Re: VDP 8x16 Interlace Mode
Posted: Tue May 12, 2020 10:35 am
by Miquel
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.
Re: VDP 8x16 Interlace Mode
Posted: Wed May 13, 2020 5:13 am
by mickagame
Thanks for your answers guys. It make sens.
Re: VDP 8x16 Interlace Mode
Posted: Thu May 14, 2020 1:32 pm
by Miquel
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.
Re: VDP 8x16 Interlace Mode
Posted: Fri May 15, 2020 10:41 am
by TmEE co.(TM)
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
Re: VDP 8x16 Interlace Mode
Posted: Sun May 17, 2020 9:36 am
by danibus
Very nice. Is there any post about your experiments?
Re: VDP 8x16 Interlace Mode
Posted: Sun May 17, 2020 11:30 am
by TmEE co.(TM)
Possibly but these are buried into past that is many years ago...