11 March 2016 - Forum Rules
Started by FUTURA, December 14, 2020, 01:50:36 PM
Quote from: Anime_World on December 15, 2020, 06:25:29 AMDon't test using Fusion! Try picodrive or gens.
Quote from: Anime_World on December 15, 2020, 09:45:03 PMSo, if works in gens and picodrive. Your handheld is the problem.Try to update your software with Neto's Mega drive Menu
Quote from: KingMike on December 15, 2020, 11:01:57 PMIt sounds like the problem is probably that it is an AtGames device.I don't think I've used one but they are notorious for being among the worst devices to play Genesis games.So it's a blind guess what they could've done wrong here.
Quote from: FUTURA on December 16, 2020, 09:56:40 AMThere was a similar problem with Super Bubble Bobble. It loaded on the menu and froze there. However I found a rare version of the rom that had been "fixed" and loads fine on the handheld. So I was able to make an IPS Patch from it. So if that game can be fixed then I'm sure this one also can be.
Quote from: Jorpho on December 16, 2020, 11:28:39 AMIf you think that's related, then it seems to me the obvious thing to do is to compare the patched version of Super Bubble Bobble with the unpatched version, determine what was changed, and see if there is a similar sequence of bytes in Spider-Man that can also be changed. You might have to get a disassembler program involved.I've never heard of Spider-Man using any particularly exotic programming techniques, but then it's hardly an especially popular game. TCRF notes that there is a level select code; does the crash still happen if you use that?
Quote from: FUTURA on December 16, 2020, 11:45:00 AMYou just need to copy original ROM (1MB) 4 times to new file to make it 5MB and at the end add the bytes I've written above.
copy /b spider.bin+spider.bin+spider.bin+spider.bin+spider.bin bigspider.bin
Quote from: Jorpho on December 16, 2020, 08:08:59 PMWell, if you want to try that with Separation Anxiety, you can use the Windows command line.Locate the folder where your ROM is stored. Hold down Shift, right-click the folder, and select "Open command window here". Then, assuming your ROM is named "spider.bin", typeCode Select Expandcopy /b spider.bin+spider.bin+spider.bin+spider.bin+spider.bin bigspider.bin
Quote from: FUTURA on December 16, 2020, 09:04:56 PMFor the hell of it I made a folder, renamed the actual rom to "spider.bin" and executed that code. It didn't work, threw up an error with red letters.
QuotePlus, how does that command add the "extra bytes"?
Quote from: Jorpho on December 16, 2020, 11:39:00 PMIt "threw up an error with red letters" in Windows, or when you tried to use the ROM on your Mega Drive portable? Windows generally doesn't display errors with red letters, at least not on the command line.
Quote from: FUTURA on December 17, 2020, 09:44:37 AMWhen I right-clicked the folder I chose the option that was there which was to open a poweshell menu on the folder which was like a blue command prompt
Quote from: Jorpho on December 17, 2020, 10:13:08 AMYes, Powershell is completely different from the standard command prompt and things requiring the command prompt will probably not work in Powershell. For future reference.
Quote from: KingMike on December 17, 2020, 07:19:15 PMGames can fail to work (especially on crappy hardware) for many reasons.You need to stop the assumption that something that makes game X work will make game Y work as well.The same with your Pac-Man report as well. The header tells us nothing, nor does it matter if a similar game works and the other doesn't. What you are asking is for people who know how to disassemble the game code (itself not a quick task) and then blindly guess what sort of game programming might be too difficult for your fly-by-night designed device to handle.From the Super Bubble Bobble bootleg, it seems they considered the Genesis will mirror the ROM.I'm guessing that the game trying to read more than 4MB, or at address $400000 and beyond will break it on an official Genesis console with a Sega CD attached as well.Super Bubble Bobble is obviously a pirate game, which means we should assume it had no program quality standards.Separation Anxiety is a game by a professional licensed developer, and if it would break on a real console with Sega CD attached (by reading a bad memory region), it surely would've been called out at the time of release.
Quote from: Anime_World on December 18, 2020, 12:14:49 AMTry with the last Neto's bootloader:https://www.neto-games.com.br/rom_hack/Neto_Boot_Loader_v1_46a_e.rarAll these roms use the same engine: - Spiderman and Xmen Arcade Revenge - Spiderman vs Kingpin - Maximum Carnage - Separation AnxietyCan you check them?
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