Translation of NJ's new page for his CPS2 emulator!

August 4th, 2006, 04:02 Posted By: BelmontSlayer

The original page is here,

http://neocdz.hp.infoseek.co.jp/psp/cps2.html

Here's what I could translate from the page. (My Japanese is a little rusty) If this translation is used elsewhere please give credit to me (BelmontSlayer), as this took almost 45 minutes!

Japanese To English Tranlation

When I first made my CPS1 emulator, the emulation of the Musashi M68000 (The core of MAME) wasn't running so good. After figuring out how the core operated I was able to emulate the remodeling of C68K. Even more suprising was that sound worked quite well!

When i decided to try CPS2, the processing of sprites was actually easier than CPS1. Sprite proccessing is a big factor in emulation.

The PSP has 32MB of memory, but the OS takes 8MB by itself, so only 24MB memory can be used. Because 4MB is used for the emulator, you can only use 20MB as the data area for the ROM of the game. But, memory is not enough alone. If there is no XOR table for the encoding cancellation of ROM, its not very usefull.

I tried using sound with the emulator. As for BGM (Background Music) there is no problem, but because the SE (Sound Effects) cracks somewhat, it becomes a matter of concern. I tried lowering the volume, but it isn't solved that simply.

Also, there are several sprites displaying strangely. This is also a problem unless it is solved.

I tried using the same cache system as my NEOGEO emulator, and was able to move in-game. But, according to my expectations that's not good enough. Because the emulator is slowly reading the cache file, the game play very slow. The reason is that smooth animation when using sprite cache is not effective.

The CPS2 emulation is a small advancement. But throwing out the project halfway, without a regret is kind of hard.

My motivation is slowly declining. (NJ laughs)
I still haven't decided if I will release this or not.

End Of Tranlation

So hopefully he will release the source code...But it seems as if he thinks smooth emulation isn't possible.

-- Update --
A test build has been posted on the website. You can download it by following the link at the top of this news article.

Just a note, Make sure you run your rom zip though the included converter. Games will not run without the cache file.

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