NEOGEO Emulator for PSP beta

@ voltron: No. The universe Bios just adds some tweaks. Romsets are still identified by their CRC and (if NJ left it in - SHA1 Checksums).

ROM_LOAD16_BYTE( "240-c1.bin", 0x0000000, 0x800000, CRC(effac504) SHA1(e36a96e7369b02c7e839b5abf3c6799453ba1927) )

this is a typical (while older) line of sourcecode (pc mame) for loading a rom. And this is where the problems begin: the bigger games can have like 8 x 8MB Videoroms (besides all the program, music and voice-roms). The Cachefiles starts, where the physical PSP-memory ends by splitting up all "missing" Videoroms in small chunks to make them fit in the psp-mem as soon as they´re needed. And this is what makes me think we wont get any significant performance or compatibility-boosts (Really hope NJ proves me wrong !)


The ".rom" files were originally used in NeorageX which always needed decrypted graphic roms. Many NeoGeo games are encrypted to stop bootleggers, so some of them have/had to be decrypted to run in neoragex. Mame on the other hand always wanted to emulate a machine 100%, so mame can handle crypted roms, as the decryption was done IN the emulation (as the original machine would do, too).

Well, as I said before I doubt well see MUCH of a performance/compatibility-increase, as loading from the memstick will always be too slow. Im actually thinking of a bankswitching-type of "workaround", but that would need a proper prediction when which rom is needed ... prolly impossible to accomplish !?

pdogg as you have seen and probably know this games where able to run in varios forms give NJ credit he is just barely getting started. And dificult to do maibe impossible nothing is impossible.

Now the only consirn i have for NJ is what can possiblie be done for less energy consumption been that you load a game next thing you know your battery is at 75% and you only played a couple of minutes

There are no miracles, see the readme of NJ and the list of games Impossible to support at present and in the future.

Anyone else having lockup issues on this release ????

on, dont get me wrong ! NJ has done A LOT for us, neogeo-wise -> fully appreciated (Not to forget YoYoFr as he made the emu NJ´s work is based on) I didnt mean to crit him, but I FEAR the technical limitations of the PSP (memory) will make it very hard to get any significant performance or compatibility-boosts. The point is that the emulation itself is nearly perfect (even though the emu is still young), as its basically the same as NeoGeo CD (68k, Z80 and so on), But theres not much to do about the memory-problem. (STILL I hope NJ proves me wrong) His caching-approach is very good, but the problem of the speed of the memstick will persist .
Again: Plz NJ, prove me wrong (nobody would love it more than me) :)

Nobody sayd you did pdogg just give some hope to the newpeople out there that have hopes im glad with what its able to do now ive always been a 2d fighter lover and now i have like 50 of them in mi hands great job

Thank you pdogg for your answer to my .rom extension question. The explanation was appreciated.

1.) A lot of things that we can do now on the PSP were thought to be "impossible" not all that long ago. This should give hope for the future.

2.) Homebrew just had its first anniversary and look how far PSP homebrew has progressed in just 1 year.

3.) There is a lot of talk about memory stick speeds too slow. Some memory sticks are faster than others. I use a SanDisk Ultra II and it is much faster than regular memory sticks. Also, SanDisk will probably release Extreme III PRO Duo's hopefully and those are even faster than the Ultra II's..... SO would faster memory sticks alleviate this problem?

All in all, it still is great work and still a WIP. NJ could have stopped after NeoGeo CDZ and he would have been greatly respected. But now he is working on this. We owe him so much.

Quote:

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Originally Posted by pdogg

on, dont get me wrong ! NJ has done A LOT for us, neogeo-wise -> fully appreciated (Not to forget YoYoFr as he made the emu NJ´s work is based on) I didnt mean to crit him, but I FEAR the technical limitations of the PSP (memory) will make it very hard to get any significant performance or compatibility-boosts. The point is that the emulation itself is nearly perfect (even though the emu is still young), as its basically the same as NeoGeo CD (68k, Z80 and so on), But theres not much to do about the memory-problem. (STILL I hope NJ proves me wrong) His caching-approach is very good, but the problem of the speed of the memstick will persist .
Again: Plz NJ, prove me wrong (nobody would love it more than me) :)

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i also agree, they had done a lot in just 1 year. just imagine the progress in the second and third year, just imagine how many things the psp can do :)

I'm sure some day there will be a way to play large games from the memory card like the metal slug games. No worries here. I mean look at the n64 emus they are getting close to being playable. If thats possible then i think Neo Geo will work in time either through faster memory cards or another method like loading the game in portions. Anyways great work.