PSP7800: Atari 7800 emulator for PSP v1.0.3 (major bug fix)

[Poem58]

And those 4 that you listed as working Poem- are Overdumps, not the official correctly sized rom dumps.

They will start true, but also crash the emulator while in-game.

Ok...what sizes are wrong and what are correct...mine played in game for quite awhile but I didn't play any further than like 5 minutes into each game....

I have in duplicate from two different sources and none have crashed....I figure that the others I have issues with graphically etc...are rom issues..but I didn't realize working ones were a problem...

It really doesn't matter....my Atari heart belongs to the 2600 anyway....graphics may not have been as good as 2600 but the nostalgia of sitting in front of the TV when you're 9 years old until it's 1-2 in the morning and you just can't stop playing missile command no matter how hard it is to keep your eyes open....I bet everyone would have to admit it...we ALL have at least one experience falling asleep DURING a game cause we just didn't wanna stop.
Good times.....Good times!

But I do appreciate what ZX has done here in bringing another (and mainly not thought of much as Nintendo won before the 7800 released) system to our gaming pleasure.

[carpy]

The roms on this site are the official, correct roms:

http://www.atari7800.org/emulation.htm

Lots of the roms found elsewhere are bad, overdumps, or incorrectly named. Lots of the early 7800 PC emulators assumed these bad/overdump roms were, in fact, correct ROMS. Which is why the early emulators had some of the same compatibility problems this one currently has, yet the windows port of it doesn't.

[Poem58]

OK...thats where I had gotten mine....
So I guess mine are ok after all...
I will have to do a full test of the roms to get an idea which work and which don't for me...
since both of ours are from the same source does your NinjaGolf work correctly?
If so I need to go back to 1.5 cause 3.02OE-A won't run Dgen so it may be the cause of problems with this as well...sometimes I load a rom and it freezes the PSP and when I tried Donkey Kong after switching to Digital pad controls I immediatly tried to exit using the home key and it froze but continued to play the game sound in background of please wait screen...SO I don't know if it's just me at 3.02 or if I need to go back to 1.5 or up to 3.03OE-B...

Still confused by all these options!

[carpy]

Alternative Art:

Icon0.png & Pic1.png are semi-transparent (no background color)

[zx-81]

@carpy: nice ones

[carpy]

Apparently, in the Windows Port, the compiled Binary (.exe) is distributed with a data file that compares the CRC of the roms, and defines the cart type, and allows the problem games to work.

I have confirmed that when this prosystem.dat file is present in the same folder as the prosystem.exe in windows, the games listed above run fine, but when this prosystem.dat file isn't present, the games listed above exhibit the same compatiblity problems as they do currently on the PSP.

[zx-81]

Apparently, in the Windows Port, the compiled Binary (.exe) is distributed with a data file that compares the CRC of the roms, and defines the cart type, and allows the problem games to work.

I have confirmed that when this prosystem.dat file is present in the same folder as the prosystem.exe in windows, the games listed above run fine, but when this prosystem.dat file isn't present, the games listed above exhibit the same compatiblity problems as they do currently on the PSP.

Yes, that's it ... Danno on Qj did the same observation and i've modified the code and using this prosystem.dat file it works now just fine.

Thanks for your help, i will release a new version soon