#Snes9x bad sum checksum code

My checksum was simply generated by crc32 in UNIX. In the ROM itself, the checksum bytes at 0x14D are 77 CD 7E.ĮDIT: Huh, the title string at 0x134 is 'ECLIPSE'. Sorry for the noob question (I don't know much about Game Boy), but what's the right way to calculate this checksum? When I run the UNIX utility cksum on the ROM, I get 0x3AE59C99. Is the checksum of this English proto 0xcd555712? if so, the problem is in the emulator: MESS emulates it with no issues Interesting, so that's the first-person 'Lunar Chase' that was displayed at the 1991 CES. But that's all assuming that my emulator (KiGB 2.0.4, since I'm on a Mac) isn't completely messing it up.

#Snes9x bad sum checksum code

To me, it looks like it's either a damaged ROM, a bad dump, or a case where the devs have branched around tons of code for some reason. It looks like they were a good ways into the game.ĭoes the loop I described happen in all emulators, and/or on real hardware? If it does, then it really can't be a tech demo, because the tech never gets demo-ed! and it's only 16K smaller than the final binary. The idea of it being 'just a tech demo' doesn't make sense to me, though, because there's tons of unused text in the ROM - mission instructions, item descriptions, shop text, etc.

The Lunar Chase prototype is probably just a tech demo. Later, it because apparent it was a Game Boy prototype. Initially, everyone thought it was a SNES prototype, and that it didn't work because it was an early Super FX demo (two Super FX demos were included in the pack). The prototype originates from a bunch of documents and binaries that were given to SNES emulator developers, along with Star Fox 2.

I've been hoping for a translation of this one for some time, and the fact that this exists would seem a huge boon - assuming, that is, that there's some parallel structuring between the two ROM versions and text contents. Is my emulator working incorrectly, or is all this stuff inaccessible through normal gameplay? I read something along the way that Lunar Chase was essentially a tech demo, but the amount of text in the ROM suggests that it was much further along than that - see 0x12C7F through 0x13789, for instance.Īnyway, if anyone knows more about the proto, or can verify whether it does the same thing on real hardware (or a better emulator), I'm all ears. Collect this crystal and return to the base. 'Welcome to Lunar Chase ! I am your Captain.

Opening the proto up with a hex editor, it looks like there's a ton of English text in there, including the text that's apparently supposed to follow the Captain's comments (at 0x17BD1): 256 KB), and doesn't seem to work properly in the emulators I've tried - after the game starts up, the sequence that ends with the Captain telling me 'Here is your first mission' just loops endlessly. It's 16 KB smaller than the X ROM I have (240 vs. Nosing about on one of the ROM sites, I found an English-language prototype under the title 'Lunar Chase'. I've been curious for a while about the Game Boy title X (Ekkusu / エックス), which was never released in the US.

Posted: Thu 1:11 am Post subject: Game Boy: X (Ekkusu) English-language prototype Game Boy: X (Ekkusu) English-language prototype