Homebrew Emulation GameYob, a gameboy emulator for DS

[nl255]

If a game doesn't work with the GBC Bios on, it doesn't work on a real gameboy. If it's just that game that doesn't work, I'd think that you have a bad rom. You can confirm this by trying it with the bios in another emulator - say, bgb. Or just try to find another rom.

This may seem random, but I was bored, so GameYob now supports GBS playback. Someone requested that months ago.

Though doesn't the GBC bios verify the ROM checksum (just like the Genesis/Megadrive) which will prevent most romhacks and homebrew roms (like Ultima 3) from working correctly unless you manually "fix" the checksum?

 

[Drenn]

Though doesn't the GBC bios verify the ROM checksum (just like the Genesis/Megadrive) which will prevent most romhacks and homebrew roms (like Ultima 3) from working correctly unless you manually "fix" the checksum?

That's what I'm saying. Romhacks worth their salt should fix the checksums, but some don't, and thus they don't get past the bios. What I mean by a "bad rom" is a rom which is a hack or which is incorrectly dumped.

To be technical about it, there are 2 checksums. The gameboy only cares about the header checksum. The rom checksum doesn't really matter.

 

[nl255]

That's what I'm saying. Romhacks worth their salt should fix the checksums, but some don't, and thus they don't get past the bios. What I mean by a "bad rom" is a rom which is a hack or which is incorrectly dumped.

To be technical about it, there are 2 checksums. The gameboy only cares about the header checksum. The rom checksum doesn't really matter.

Yeah, I figured that. I know Gens has an option to automatically fix the checksum because it was a huge problem with Genesis romhacks. Oh, and have there been any major changes/improvements in the unstable build recently?

 

[MarkDarkness]

I can now confirm Link's Awakening DX to be 100% completable, no bugs, color dungeon works perfectly.

 

[Pokeguy]

I knew exactly what was wrong by just seeing the filesize. Borders need to be in 16-bit color, RGB 555. Yours is 24-bit, RGB 888. Here's a RGB 555 version of your file, which should work.

Would be better for him to generate the img all over again though, since this one's colors are distorted

Pokeguy, try not using Paint to save it, to avoid too much compression on colors.. ..if you cant do otherwise, post the original img here so someone can save it properly

Wow, its been quite a while since I asked for help. I was finally able to see this, and now have my border working. Thanks.

 

[Walker D]

no prob

 

[Xotadi]

Might use this to replace lameboy, Thanks for this

 

[link6155]

some sounds don't seem to play in The Legend of Zelda: Link's Awakening. For example, the sound of a charging up doesn't seem to work and hitting an enemy with a spin strike doesn't make the right sound.

I will stick with Lameboy for now until this is resolved. Otherwise this is much better than lameboy

 

[BORTZ]

Sometimes its better to have two emulators anyways, especially if one does certain games better than the other.

 

[AngryGeek416]

Everything is better about GameYob.

 

[PROTOBOY]

I think game yob is the best, now its just the beginning, but already its better of lameboy.

 

[Drenn]

some sounds don't seem to play in The Legend of Zelda: Link's Awakening. For example, the sound of a charging up doesn't seem to work and hitting an enemy with a spin strike doesn't make the right sound.

I will stick with Lameboy for now until this is resolved. Otherwise this is much better than lameboy

"Sound Timing Fix" should be enabled. Are you playing with 0.4.1, or the latest build? There've been improvements to audio in newer builds.

 

[Silverthorn]

"Sound Timing Fix" should be enabled. Are you playing with 0.4.1, or the latest build? There've been improvements to audio in newer builds.

Some issue I've had while testing TLOZ: Oracle of Ages :
-For some reason, when disabling the sound in the options, the game is completely frozen.
Reopening the menu and reactivating the sound makes it possible to move again.
This also happens at some points in cinematics, but not immediately. Again, reactivate the sound and the cinematic goes on.

I've also had problem with the slash sound, and the sound when cutting grass, which weren't played after first launching, but after restarting everything, I haven't been able to reproduce it again.

 

[Drenn]

Some issue I've had while testing TLOZ: Oracle of Ages :
-For some reason, when disabling the sound in the options, the game is completely frozen.
Reopening the menu and reactivating the sound makes it possible to move again.
This also happens at some points in cinematics, but not immediately. Again, reactivate the sound and the cinematic goes on.

I've also had problem with the slash sound, and the sound when cutting grass, which weren't played after first launching, but after restarting everything, I haven't been able to reproduce it again.

Disabling sound disables all aspects of sound emulation. The oracle games are expecting a certain output from the sound registers, but since sound is disabled, these registers are incorrect. Which causes the game to freeze. That's why I left it under the "debug" section. Though I can't explain why the slashing sounds didn't work.
(Disabling individual channels, on the other hand, just mutes them.)

 

[DanTheManMS]

That actually sounds an awful lot like how things worked on SNES Advance and Snezziboy (the SNES emulators for the GBA). You see, SNES Advance (and Snezziboy) did not have the power to emulate the sound core, not with the GBA's measly 16 Mhz processor, so it simply did not emulate it. However, many SNES games would often poll the sound engine and freeze if there was no response. As a result, about half of the patches in the snesadvance.dat patch file are there simply to overwrite certain commands with the "no operation" command, so that the games never reach out to the sound engine at all and thus can't freeze from lack of response. (the other half are speedhacks to make the games run faster)

 

[Kouen Hasuki]

Nice to see this emulator is still being worked on, aint checked in for a while

 

[Drenn]

Yes well, development will probably be slowing down, as I'll be moving for university in a week. I imagine I won't have as much spare time as I used to. Of course, contributions are still welcome. It's been a while since anyone made a pull request.

That actually sounds an awful lot like how things worked on SNES Advance and Snezziboy (the SNES emulators for the GBA). You see, SNES Advance (and Snezziboy) did not have the power to emulate the sound core, not with the GBA's measly 16 Mhz processor, so it simply did not emulate it. However, many SNES games would often poll the sound engine and freeze if there was no response. As a result, about half of the patches in the snesadvance.dat patch file are there simply to overwrite certain commands with the "no operation" command, so that the games never reach out to the sound engine at all and thus can't freeze from lack of response. (the other half are speedhacks to make the games run faster)

The snes has a separate processor for sound doesn't it? I see how that would be a problem.

 

[dragonblood9999]

how do i use cheats on this?

 

[Drenn]

how do i use cheats on this?

Check the faq in the first post.

 

[dragonblood9999]

Check the faq in the first post.

BGB .CHT files don't work for me.
can i use vba to make the .cht file?

Edit: the BGB .CHT files have cheats in this format
XXX-XXX-XXX so they don't work for me.