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What does Gens 32X VDP debug tell you?

Posted: Mon Feb 27, 2012 12:38 pm
by ammianus
I have gotten a basic set of images drawing on 32X in emulators, there is a background image and a set of frames of animation for a foreground "sprite". I think I've figured out how to set the CRAM palette correctly.


I noticed the Debug features in Gens let you see the VDP data. Maybe there is something I am not getting, why does it look like the images are repeated in Raw data? What does this actually tell you?

Image

I am using Gens KMod 0.7c

When I use the latest version of Gens/GS the only VDP debug is it seems to show are the color palettes at the bottom of the game screen.

Posted: Tue Feb 28, 2012 8:55 am
by TmEE co.(TM)
32X has 2x framebufffers. While you update one, you show the other.
EDIT: not the case there...

Posted: Tue Feb 28, 2012 9:05 am
by Stef
I would say the debugger display the VRAM data as 8 bpp bitmap with the colormap colors but in your case i guess the VRAM contains 15/16 bpp bitmap, it's why you see that sort of image duplication.

Posted: Wed Feb 29, 2012 12:35 am
by ammianus
Stef wrote:I would say the debugger display the VRAM data as 8 bpp bitmap with the colormap colors but in your case i guess the VRAM contains 15/16 bpp bitmap, it's why you see that sort of image duplication.
Hmm, I've actually set VDP Mode to 8bpp too. When I look at a few other demo roms, I see the same thing, along with distorted colors, so I'll assume that I'm not doing something wrong.

Posted: Wed Feb 29, 2012 6:54 pm
by Stef
Hmm well, so maybe it is exactly the contrary :p
the debugger shows 15/16 bit bitmap while you use 8 bit one :)

Posted: Thu Mar 01, 2012 2:20 am
by Chilly Willy
It might be handy to have the ability to set what mode the frame buffer is shown in regardless of what the VDP is set to.

Posted: Fri Mar 02, 2012 7:07 pm
by Stef
hmm, bot which copy older message ?

Posted: Fri Mar 02, 2012 7:58 pm
by sega16
What the heck what does this have to do with fm if this is a bot that would be a weird bot?

Posted: Fri Mar 02, 2012 8:04 pm
by Chilly Willy
It's just spam - the current spam bots actually try to derive something that SOUNDS like it might fit the thread to keep from getting deleted.

Posted: Sun Mar 04, 2012 1:06 am
by Huge
Chilly Willy wrote:It's just spam - the current spam bots actually try to derive something that SOUNDS like it might fit the thread to keep from getting deleted.
And now that they reached the point of sensible replies, they'll be able to reply to each other as well. Soon they will become self-aware and take over.

also,
Image

Posted: Sun Mar 04, 2012 8:25 am
by KanedaFr
to replay back to original post, I'm not a 32X pro so I don't even remember how I made the 32X part !
I assume, like the CD part, I did what Fonzie asked me ;)

I'm not sure I'll change anything on KMod for 2 reasons :
1/ lack of time
2/ waiting for Meradrin version

sorry

Posted: Sun Mar 04, 2012 7:07 pm
by ammianus
Huge wrote: And now that they reached the point of sensible replies, they'll be able to reply to each other as well. Soon they will become self-aware and take over.
Now I want to know what the spammer said.