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Topic: hacking adultmanga.smc ...checksum? (Read 761 times)
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der Warst
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« on: January 20, 2007, 09:07:19 pm » |
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Hey there,
while gathering Infos on Romhacking, I stumbled across those curious "Adult Manga"-Roms that can be found on many Rom sites, which supposedly a lot of people have run once, had a good laugh, and then forgot about...
Out of bore I loaded one of these in Tile Layer Pro and found out how nicely the pictures are laid out in there and therefore can easily be exchanged with custom Bitmaps, since they aren't compressed at all. So I thought about doing a fun little retarded Slideshow with my own pictures that can be run off an SNES accompanied by that super-cool background music .
One thing I noticed though is that both of these roms have a bad checksum and after comparing them to other roms I get the impression that both "adult Mangas" have a pretty irregular filesize. Will this prevent them from working if I burned them on Eproms and used them in real SNES carts?
Or are these phenomena only due to those roms not being officially licensed, which they - naturally - aren't?
Has anyone of you actually taken the effort to flash them to a devcart or something to watch 20 stupid porno drawings off their SNES just for fun, or know someone who did?
And if so, did it work?
Also, do you know of any tutorials on building custom carts apart from the following two?
http://www.snesdev.de
http://cgfm2.emuviews.com/snes/sfcdev2.php
I own an Eprom programmer, and I don't want to buy expensive flash devcarts, so you don't need to mention tokotek and the like. 
cheers,
der Warst
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Moulinoski
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« Reply #1 on: January 20, 2007, 09:49:11 pm » |
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All I can for you, sir, is bump it and see if someone else wants to help you. So...
*Bump*
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hippiejake
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« Reply #2 on: January 21, 2007, 02:39:59 am » |
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Will this prevent them from working if I burned them on Eproms and used them in real SNES carts?
Or are these phenomena only due to those roms not being officially licensed, which they - naturally - aren't?
Well, try it bsnes. That would be your best indication if it will work in the console. There's my two cents.  [There's... porno games!?! ...interesting...] |
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Maegra
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« Reply #3 on: January 21, 2007, 06:31:35 am » |
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for more adult snes roms check out the
SM_Choukyoushi_Hitomi_Vol_1_(J).zip
series, its kinda point and click, date sim'ish, and there not (PD) so...
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Kitsune Sniper
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« Reply #4 on: January 21, 2007, 04:00:32 pm » |
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Will this prevent them from working if I burned them on Eproms and used them in real SNES carts?
Or are these phenomena only due to those roms not being officially licensed, which they - naturally - aren't?
Well, try it bsnes. That would be your best indication if it will work in the console. There's my two cents. [There's... porno games!?! ...interesting...] Get Rape Games. *runs laughing like a maniac* |
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d4s
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« Reply #5 on: January 21, 2007, 09:08:30 pm » |
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i'd probably start out with hacking a rom that does a bit more than adult manga.
there are hundreds of snes slideshows out there.
look for something that uses 256 color tiles or one of the hires modes.
apart from that, i think you really, really should look into programming your own slideshow instead if hacking an existing one.
i think neviksti even released a complete slideshow with sourcecode and graphics conversion tool.
all you'd need to do would be supplying your pictures in the correct format(probably 256 color pcx files) and
let the compiler do its thing.
no need to even think about inserting fullscreen graphics with tile layer pro, which is a royal pain in the ass.
i cant believe people are using it to this day for all their graphics editing needs.
adding the music from the adult manga roms is easy - it was stolen from some game in the first place, anyway.
most likely, you'll just have to upload an apu code-block, then select a tune and thats it.
the checksum doenst have to be correct in order to run a game. plus, most homebrewn roms dont have a valid checksum at all.
filesize doesnt matter when programming an eprom, the programming software will mostly pad the remaining free space with $FF, anyway.
just make sure there's no backup-unit-header in front of the rom.
snesdev.romhack.de is one of my pages, btw.
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der Warst
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« Reply #6 on: January 23, 2007, 06:19:53 pm » |
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Hey d4s. thanks for the infos
I've done a little research in the meantime and found out about a dozen Slideshows that definately look a lot more promising than that adult manga crap.
i'd probably start out with hacking a rom that does a bit more than adult manga. I'm pretty shure everyone would. But perhaps it gets a little more understandable when I explain why I wanted to do that.
Currently, I'm circuitbending Super Nintendos to be used as some kind of weird VJ tool. I do this by interconnecting several pins of the V-Ram chips inside the SNES more or less randomly. This semi-controllably scrambles the picture from very slightly to far beyond recognition. Since most Games rely on you seeing what's going on on the screen (duh), navigating trough a Game gets pretty hard, if not impossible, so I was thinking about means of getting the SNES to show images with an easier interface. The adult manga roms were the first slideshow roms I stumbled across, and exchanging of pictures could be achived in a pretty straightforward manner, so I stuck with them.
apart from that, i think you really, really should look into programming your own slideshow instead if hacking an existing one.
i think neviksti even released a complete slideshow with sourcecode and graphics conversion tool.
all you'd need to do would be supplying your pictures in the correct format(probably 256 color pcx files) and
let the compiler do its thing. Sounds great! Do you know where I could find that? I already found the conversion tool, but since I've heard about the existence of romhacking only about one month ago, I I'm not as familiar with resources as you guys apparently are. There's been some very different slideshows I found that seem to have the same code, so I guess there exists or has existed something like a slideshow creator that has been used by several people, but I didn't find anything that said something like: "Create your own SNES slideshow without having to learn to code..."
no need to even think about inserting fullscreen graphics with tile layer pro, which is a royal pain in the ass.
i cant believe people are using it to this day for all their graphics editing needs. It's all over the internet and People recommend it, so what else should I use in your opinion? Is there any easier way to extract images from SNES roms? I'm also trying to alter the background frames of the Super Gameboy and I don't think I'll be able to do that with tlp.
adding the music from the adult manga roms is easy - it was stolen from some game in the first place, anyway.
most likely, you'll just have to upload an apu code-block, then select a tune and thats it. really? I didn't find very much info about music stuff and most of it seemed like far beyond my understanding. I somehow got the impression that working with music is worst documented of all the stuff that can be done. Is there any way to have a SNES play my own music? Is there any way to convert .wav to SPC?
the checksum doenst have to be correct in order to run a game. plus, most homebrewn roms dont have a valid checksum at all.
filesize doesnt matter when programming an eprom, the programming software will mostly pad the remaining free space with $FF, anyway.
just make sure there's no backup-unit-header in front of the rom. I allready suspected someting like this, since all homebrew Stuff Itried had an invalid checksum.
snesdev.romhack.de is one of my pages, btw. Oh, hey, I think I'll come back to you if you still sell Eproms. If I get all this sorted out somehow and finally end up with something that can be burnt on an Eprom. Is it also possible to use smaller Eproms if the filesize is small enough? Because those 8mb Eproms are really expensive...
So many questions...
der Warst
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« Last Edit: January 23, 2007, 06:34:51 pm by der Warst »
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