Homebrew blargSnes -- SNES emulator for the 3DS (WIP)

[Arisotura]

This shit happens if an unknown SPC700 instruction is met. Handling for those cases is particulary ungraceful; the SPC700 thread just enters an endless loop. It can't be stopped anymore, and when starting another game blargSNES first waits for it to terminate, so everything locks up.


Mode 7 IS implemented. Minus one or two details.

 

[gamesquest1]

is there any chance blarg could be made to run in the same mode as smash to have extra ram access or whatever that gives.....or wouldn't it help anyway

 

[Arisotura]

More RAM wouldn't help it.

Considering it was originally built to run on a DS, the memory footprint is relatively low anyway.

 

[gamesquest1]

More RAM wouldn't help it.

Considering it was originally built to run on a DS, the memory footprint is relatively low anyway.

though it worth checking

 

[hippy dave]

Sounds like you're making good progress figuring out the best use of the gfx chip. Have you made any dents in figuring out the DSP at all? No pressure, just curious

 

[Arisotura]

Nah, I didn't go far with the DSP for now.

DSP reverse-engineering is pretty much its own project, in fact. I kinda got myself sidetracked there

 

[hippy dave]

Ah well, fair play

 

[Arisotura]

Fucking around with render-to-texture. As I expected, it's pretty easy to do with the PICA200.

Scaling isn't bad, uh. Also gives the impression of more speed because your character travels more distance.

This is with (bi?)linear filtering applied. I tried without filtering and it looks like total shit. Might give the option to toggle filtering, though.

 

[the_randomizer]

Fucking around with render-to-texture. As I expected, it's pretty easy to do with the PICA200.

Scaling isn't bad, uh. Also gives the impression of more speed because your character travels more distance.

This is with (bi?)linear filtering applied. I tried without filtering and it looks like total shit. Might give the option to toggle filtering, though.

Looking good, man

 

[kyogre123]

Fucking around with render-to-texture. As I expected, it's pretty easy to do with the PICA200.

Scaling isn't bad, uh. Also gives the impression of more speed because your character travels more distance.

This is with (bi?)linear filtering applied. I tried without filtering and it looks like total shit. Might give the option to toggle filtering, though.

How about an additional option for 274x240 (rescaled from 256x240) and 320x240 (how it looked on TV)?

 

[MarkDarkness]

I don't really get why homebrews don't have access to sound. Is it running in some sort of protected mode or are the instructions simply undocumented so far?

 

[the_randomizer]

I don't really get why homebrews don't have access to sound. Is it running in some sort of protected mode or are the instructions simply undocumented so far?

Because it's not that simple to implement and a royal pain in the ass. Give it time.

 

[MarkDarkness]

Because it's not that simple to implement and a royal pain in the ass. Give it time.

Sure. I figured. Just curious about what's particularly holding it back, as I haven't really had the time to read any 3DS homebrew docs yet.

 

[Yepi69]

Can someone confirm me how EarthBound plays on this new emulator?

The DS one was crap but since the 3DS is way more powerful...

 

[the_randomizer]

Can someone confirm me how EarthBound plays on this new emulator?

The DS one was crap but since the 3DS is way more powerful...

I might be bootable, not sure, but eventually, it should work. Just waiting for a day were I don't have to use a flashcard.

 

[wheezyNoiZe]

Can someone confirm me how EarthBound plays on this new emulator?

The DS one was crap but since the 3DS is way more powerful...

Quite good actually! Never really played right through... just waiting till sound is implemented, hopefully in the not too distant future.

 

[davhuit]

Some games might not boot because of the lack of sound emulation. I remember in the old days that we had to fix some games on "SnesAdvance" on GBA to make them play without sound (or maybe spc is supported but you just don't have sound output?).

I forgot how we were doing it precisely, but from what I remember, we were noping (EAEA) the spc offsets in the roms or something like that.

 

[Coto]

Some games might not boot because of the lack of sound emulation. I remember in the old days that we had to fix some games on "SnesAdvance" on GBA to make them play without sound (or maybe spc is supported but you just don't have sound output?).

I forgot how we were doing it precisely, but from what I remember, we were noping (EAEA) the spc offsets in the roms or something like that.

nops then patch address to spcs jump to return (from spc) code?

 

[hippy dave]

I think I remember him saying that the SPC emulation was in there now, just no sound output.

 

[Arisotura]

I think I remember him saying that the SPC emulation was in there now, just no sound output.

This.


The reason sound output is tricky is that
a) there is CSND but only a few system apps have access to it
b) there is the DSP but it's mostly unknown, and you need an official DSP binary which would be illegal to provide


I occasionally mess with the DSP but reverse-engineering it is a separate project. Considering the lack of an emulator that runs a game far enough to get useful DSP logs, I guess we will have to disassemble a DSP binary. That sucks. The assembly language for that DSP is ugly and weird.