Homebrew Emulation GameYob, a gameboy emulator for DS

windwakr · May 19, 2013

bobmcjr said:
I've noticed an issue on my SCDS2 where any file I/O write operations either take a long time (writing the settings ini takes 10-20 seconds) or the entire emulator just freezes (saving savestates in GBC games always freeze).

Have you tried reformatting your MSD(after backing up everything on it first, obviously)?

bobmcjr · May 19, 2013

windwakr said:
Have you tried reformatting your MSD(after backing up everything on it first, obviously)?

I'd rather not as everything else including lameboy can read/write perfectly..

r0b0tr0n · May 19, 2013

Walker D said:
Finally uploaded my borders 12 in total..

some are gameboy color's, similar to the ones uploaded by Sizednoch ...But they are all vector based, and seemed different enough for me to decide uploading (options never hurt) ...if you like the clean look of vectors, try this ones ...if you want something more like the real deal, take a look at Sizednochi ones.
The others are all new

What program or kind of .bmp compression are you using for the borders? I tried making one on Paint but it looks all messed up on the DS.

Thank you!

Walker D · May 19, 2013

r0b0tr0n said:
What program or kind of .bmp compression are you using for the borders? I tried making one on Paint but it looks all messed up on the DS.

Thank you!

No prob

compressions in Paint are not reliable, since they're automatically set.
I use PS CS4 ...images saved as 256x192, uncompressed, 15-bpp (A1 R5 G5 B5) bitmap.

If you need another custom border, feel free to PM me and I'll see what I can do

corbindavenport · May 19, 2013

Can't wait to try this on my Acekard 2i! I might help out on the Github project too

r0b0tr0n · May 20, 2013

Walker D said:
I use PS CS4 ...images saved as 256x192, uncompressed, 15-bpp (A1 R5 G5 B5) bitmap.

Thank you! That completely did the trick

avenir · May 20, 2013

alternatively, you can use xenobox 16bitbmp to convert 32bit to 16bit.
http://sourceforge.net/projects/lactlib/files/nds/xenobox.7z

PS. zip decompression requires special memory mapping depending on how gameyob is implemented.
I ported Info-ZIP funzip to nesds, but the code became dirty because malloc() couldn't be used (Using malloc will overwrite decompressed area!)...

profi200 · May 20, 2013

Since the last build, the sound cracks on the left side a bit and sound channels can no longer be properly switched on or off.

Btw: Not all sounds played correctly. In Pokėmon Cristal the sound of Tentacruel (Tentoxa in german), for example.

sverx · May 20, 2013

Drenn said:
I examined lameboy through desmume and I think my algorithm is very very similar to what it's doing.

Very similar... but different? What is lameboy doing? Not flickering & blending?

geheim · May 20, 2013

Thanks so much for this Emulator, its working great and better as LameBoy! There is just one ROM that doesnt play at all which is The Smurfs, I liked that game alot and would like to Play it again. Unfortunately the game only stays at a white Screen... Could you look into that?? Would be great of you, thanks in advance!

Drenn · May 21, 2013

sverx said:
Very similar... but different? What is lameboy doing? Not flickering & blending?

It blends 2 layers, offset by a fraction of a pixel in both directions (I'm using a fourth of a pixel, iirc). This alone can create "holes" in single-pixel details, especially in text, so it also jitters the 2 background layers so that they are still blended in the same way, but at slightly different offsets. In one frame, the first layer would be bottom-left from the centre and the other would be top-right. Next frame, one layer is top-left from the centre, and the other is bottom right. The current "filter B" is just "filter A" without the jittering, btw.
That might not be exactly what lameboy's doing, that's just what I think it's doing based on toggling layers in desmume. Nevertheless, the results are pretty good.

profi200 said:
Since the last build, the sound cracks on the left side a bit and sound channels can no longer be properly switched on or off.

Btw: Not all sounds played correctly. In Pokėmon Cristal the sound of Tentacruel (Tentoxa in german), for example.

geheim said:
Thanks so much for this Emulator, its working great and better as LameBoy! There is just one ROM that doesnt play at all which is The Smurfs, I liked that game alot and would like to Play it again. Unfortunately the game only stays at a white Screen... Could you look into that?? Would be great of you, thanks in advance!

I'll see what I can do.

AngryGeek416 · May 24, 2013

any chance for screen stretching? the window is smaller then the actual gameboy

Arm73 · May 24, 2013

CanuckBuck said:
any chance for screen stretching? the window is smaller then the actual gameboy

Ah, lazy kids these days.
If you bother to read at least the last few posts in this tread, you'll find your answer.

In short, yes.

nilsolav · May 24, 2013

Alright, loaded this onto my DSTWO card, but no games are showing up. Is there a specific place I need to put the gameyob.ds and my GBA roms? And I do open gameyob as a DS game itself, correct? I got a black screen where I could browse through my file directories, but the GBA files did not show up.

BassAceGold · May 24, 2013

nilsolav said:
Alright, loaded this onto my DSTWO card, but no games are showing up. Is there a specific place I need to put the gameyob.ds and my GBA roms? And I do open gameyob as a DS game itself, correct? I got a black screen where I could browse through my file directories, but the GBA files did not show up.

Gameyob is a Gameboy Color emulator. You'll probably want to use TempGBA for GBA games.

Matando · May 24, 2013

Ok long time no post in this thread. as of the date and time of this post. I loaded the latest compiled build from dropbox and upon loading with sudokuhax all I get is a black screen. My roms and bios is in the sd:/lameboy/ path. Any suggestions?

nilsolav · May 25, 2013

BassAceGold said:
Gameyob is a Gameboy Color emulator. You'll probably want to use TempGBA for GBA games.

Oh, sorry about the confusion ehehe, someone linked me to this thread saying it was for GBA. Thanks for the link to TempGBA tho, I'll give it a shot.

Drenn · May 25, 2013

Arm73 said:
I tried that, still no luck

VatoLoco said:
Same as Arm73 here.

Matando said:
Ok long time no post in this thread. as of the date and time of this post. I loaded the latest compiled build from dropbox and upon loading with sudokuhax all I get is a black screen. My roms and bios is in the sd:/lameboy/ path. Any suggestions?

Yup, dsi mode stopped working again. For those who can compile I think it may have stopped working in this commit or thereabouts, where I removed a few dsimode checks since I thought I'd fixed the issue properly.

Arm73 · May 26, 2013

Drenn said:
Yup, dsi mode stopped working again. For those who can compile I think it may have stopped working in this commit or thereabouts, where I removed a few dsimode checks since I thought I'd fixed the issue properly.

So what's the last sudokuhax compatible build ? If there is a link to that, I guess is better then nothing, sometimes when updating I overwrite previous files and older versions get lost....
I'm using now v0.3-100-g694d and it's working fine, but I was wandering if there is a more recent version still working on the DSi worth checking out ...
Cheers.

DanTheManMS · May 27, 2013

Drenn said:
It blends 2 layers, offset by a fraction of a pixel in both directions (I'm using a fourth of a pixel, iirc). This alone can create "holes" in single-pixel details, especially in text, so it also jitters the 2 background layers so that they are still blended in the same way, but at slightly different offsets. In one frame, the first layer would be bottom-left from the centre and the other would be top-right. Next frame, one layer is top-left from the centre, and the other is bottom right. The current "filter B" is just "filter A" without the jittering, btw.

That might not be exactly what lameboy's doing, that's just what I think it's doing based on toggling layers in desmume. Nevertheless, the results are pretty good.

Wow, that's way more complicated than what I thought it was doing. I thought it was just doing a blanket resizing to ~1.5x normal size, and applying a very basic bilinear filter to the entire screen. At least that's what I remember nutki saying at the time, years ago, though that may have just been an oversimplification to break it down into something we could understand. In actuality I have no idea how bilinear filtering is done so perhaps it's exactly as you described it.

At the end of one of my videos long ago, I demonstrated Lameboy v0.9 a bit, which was the first version to implement the filtered full-screen (previous versions had full-screen but it was just a sheer nearest-neighbor resize with no filtering) which attempts to show the difference between the filtered and unfiltered fullscreen options -- https://www.youtube.com/watch?featu...D5zdyYuc&list=UUs3pZIh0PoWSt2TOkNuUF5Q#t=411s

Now if nutki upgraded the filtering algorithm between v0.9 and the final version, I would have no idea. If he did, it may be worth looking back at v0.9 if it has a simpler method.

Homebrew Emulation GameYob, a gameboy emulator for DS

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