SpritesMind.Net

Bad move.

This should give you a quick insight of where the boot check code is on each bios. After this detection is done, the next thing the BIOS do at that region is attempt detection "RAM_CARTRIDG" string at $400010. All CD BIOSes seem to do this regardless of region. Ah yes, I think I remember RAM_CARTRI...

Congrats! Source code release would be cool, I'd check that out. I might even look into decoding other SGA vid packets. Never really looked beyond Night Trap & Sewer Shark.

It's not very obvious, but you need to have the "Image" window selected right now in order for input to be captured. Just clicking on the menu will cause you to lose focus on the Image window, and input will no longer be captured by the emulator. I'd guess that's what's causing your problem. There ...

Super cool! Thanks! I can't believe we (mostly you) were able cracked the code so quickly. No problem. To be fair, it could have been a lot more complicated if they decided to do more than just boost the colors of the Sega CD version. Luckily they settled for a relatively simple format, so it was p...

Files: Night Trap 32X Video Codebook - 2013.11.12.txt NT32XVID-FIXED-OPS.PNG Opcode listing is at the end of the text doc -- pretty much all verified. PNG contains all the 2-color fixed patterns, some of which can be referred to by multiple opcodes (don't know how much of that is intentional). The c...

This is great! I hope you're having fun working on this. I know my curiosity is piqued. :-) I suppose we could figure out all of the codes by disassembling the game code and finding the right routines, but it might actually be more interesting ths way. Oh definitely, this is very interesting. A lot...

Yeah I just change the data with a hex editor and run the ISO in Fusion. I pause sometime before the frame I want to see and take a bunch of screenshots. Fusion will automatically frame advance when you take a screenshot. That works for me. Question: What is the significance of the FF and the end of...

I can get you going in the right direction. ;) If you look at the data of the second frame, you should be able to spot the palette data [0000 0420 0421 0841 ... 18C4], all in order, fits the format (sort of dark colors, explained by the fade-in). Count them: there's 11, or in hex, 0x0B. Check the he...

Yes, but this is also part of substantial similarity: "The court excludes all public domain elements from its analysis and looks only at those elements that are protectible." It has to be a protectable element FIRST, and THEN it must be substantially similar. I think it's more just Nintendo being a...

Here's the deal: In cases of trademark infringement, there's no burden to prove exact duplication of a company's intellectual property, as long as it looks strikingly similar. This is called substantial similarity . (To learn more about substantial similarity, read this article .) In such cases, the...

The difference however is that, contrary to Mickey Mania, twhen there are preceding sprites on the same line (the "spinning" titan message), the amount of rendered sprite pixels does not hit the sprite "pixel" limit resulting from the display off period (~128 pixels according to TascoDLX tests, 144...

Looks like something got changed in MESS v0.149. It works fine in v0.148u1, but the new version expects the ROM to be at least 8KB. Just pad it out with zeroes and it'll work fine.

By default, ASM68K tacks on a small header that throws everything out of whack.

Try this instead:

Should be simple enough to do. You'd have to figure out where the level data is stored in order to relocate those chicks, but the rest of it seems pretty trivial at this point.