MAMEWorld Forums - News

> > Which bug?
>
> Espgaluda (2003/10/15 Master Ver) - espgal_igs027a.bin need to be redump. (Note: I
> didn't see this until I check it out. I don't know it have anything to do with the
> sounds or not.)
>
> Edit: Heh. There more.
>
> Ketsui: Kizuna Jigoku Tachi (2003/01/01. Master Ver.) - ket_igs027a.bin need to be
> redump.
>
> DoDonPachi III (World, 2002.05.15 Master Ver) - ddp3_igs027a.bin need to be redump.
>
> That 3 with Imperfect sounds.
>
> Don't worry about it. Unless someone lean those boards out to you.
>
> All the rest of Cave games no problem on the dumps.

Imperfect sounds, yeah the ICS2115 emulation isn't perfect.

NO DUMP files, they're the protection device, simulation should be fine for the game in question, we have no way to dump those specific MCUs as they don't use an external code or exploitable commands (and they're the later type with Execute Only area, so we wouldn't get a complete dump even if they did have)

I think maybe more important to state with all these things is that even if Phil gets the boards it might not really be something that's easy to measure.

People have tried to measure waitstate / DMA impact etc. with other systems and found it to be a horribly complex subject, something that the MAME cpu cores (and general architecture) isn't really up to supporting. It can be complex even for a Z80 case (hence why MAME can't do ZX Spectrum properly right now) and for 68K level with DMA operations from different speeds or RAM & ROM it can really become nasty to work out.

You might get a closer approximation, but I wouldn't be surprised if Phil ended up with inconclusive information for some cases, as others have before him. Cases like this can even end up being different for repaired boards if different types of RAM / ROM were used than the original. Some NeoGeo bootlegs for example have raster glitches and crazy slowdown which can seemingly only be attributed to the ROM chips they use having worse access times than the original and the hardware actually stalling on reading from ROM as the actual code is the same.