PSPVBA: GameBoy Advance Emulator for PSP v1.2.1

**ACID** · July 25th, 2006, 19:13

What ever ZX does im sure will be find for he knows his stuff

**disturbed19** · July 25th, 2006, 20:23

i noticed that when u turn the sound off there is a speed increase in the game, why is that? is the sound moved over to the media engine a 100% complete?

**zx-81** · July 25th, 2006, 21:27

Originally Posted by disturbed19

i noticed that when u turn the sound off there is a speed increase in the game, why is that? is the sound moved over to the media engine a 100% complete?

We can't put totally the sound emulation on the ME ... I've done it as it is done in snes9x, with a dedicated thread (running on the main CPU) to play the sound samples, and on the other part, the ME emulates, computes and mix to fill the sample buffer.

Now, i've just finish to modify the ME, to make it compute also some part of the GFX. It's worse, i loose 20% of CPU and there are many many graphical artefacts (mainly due to bad synchronisation / cache ...)

Then, i've begin to rewrite some instruction in ASM, but i don't think we will win something ... Gcc is better than me, to find the best ASM instructions.

On Intel platform (CISC instruction set) it has may be an interest to rewrite some part of the code in ASM, but with a MIPS, with a such reduced instruction set, and the pipeline depth that must be taken into account, it's a nightmare, and i'm not sure we gonna win something

**Exoskeletor** · July 25th, 2006, 22:12

Zx do you know why fifa 2005 doesnt work on the latest version?

**zx-81** · July 25th, 2006, 22:22

Originally Posted by Exoskeletor

Zx do you know why fifa 2005 doesnt work on the latest version?

I've no idea ... but i will investigate

**tsurumaru** · July 26th, 2006, 19:00

Originally Posted by zx-81

Now, i've just finish to modify the ME, to make it compute also some part of the GFX. It's worse, i loose 20% of CPU and there are many many graphical artefacts (mainly due to bad synchronisation / cache ...)

Then, i've begin to rewrite some instruction in ASM, but i don't think we will win something ... Gcc is better than me, to find the best ASM instructions.

On Intel platform (CISC instruction set) it has may be an interest to rewrite some part of the code in ASM, but with a MIPS, with a such reduced instruction set, and the pipeline depth that must be taken into account, it's a nightmare, and i'm not sure we gonna win something

Hi ZX-81, Sorry to keep giving you links but Laxer3a has posted his thoughts on ARM/GBA emulation on the SNESTYL forums, I thought you might want to check them out as they are essentially what you are saying with some additional thoughts:

This ones mixed in with a Daedalus discussion:

http://yoyofr.proboards44.com/index....4352305&page=3

This one's an ME thread:

http://yoyofr.proboards44.com/index....ead=1153500524

Kind regards.

**zx-81** · July 26th, 2006, 19:17

@tsurumaru: Thanks for the link ... i've read it carefully

.

**BL4Z3D247** · July 26th, 2006, 19:34

Originally Posted by Exoskeletor

Zx do you know why fifa 2005 doesnt work on the latest version?

try turnin "Disable SFX" in the settings to "no" i have Fifa 06 runnin a little slow but it runs

**pillsbdouboy** · July 27th, 2006, 02:37

good job but y dont u get the source codes from super nintendo and convert them or something to work on gba so it can be better

**mameuser** · July 27th, 2006, 05:27

Setting are SFX both on and off
and Graphics Cache on and off

all The Ant Bully graphics error.

Thread: PSPVBA: GameBoy Advance Emulator for PSP v1.2.1

Thread Tools

The Ant Bully graphics error.

Thread Information

Users Browsing this Thread

Tags for this Thread

Bookmarks

Bookmarks

Posting Permissions