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1 user currently in Rom Hacking:  hukka |
| Acmlm's Board - I2 Archive - Rom Hacking - TSA info for multiple systems needed |
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interdpth Rex Level: 36 Posts: 422/527 EXP: 294398 For next: 13712 Since: 03-20-04 Since last post: 10 days Last activity: 31 days |
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| Ok I need to know how the TSA for a block in the following systems are stored. SEGA genesis, SNES, NES, GB example: In the GBA and the DS it's stored like this Tile 1 TSA'ed: Pal + Tile + Flip Pal + Tile + Flip Pal + Tile + Flip Pal + Tile + Flip So anyone help? |
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NetSplit Koopa Level: 19 Posts: 23/117 EXP: 30378 For next: 5399 Since: 04-05-04 Since last post: 1 day Last activity: 1 hour |
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| TSA has various formats, some depending simply on the people who made it and some on other formats the game uses. I don't know much about Genesis nor SNES, so I'll discuss NES stuff (which should also be applicable for Game Boy). Consider this as a 16x16 pixel block: A B C D Basically, TSA formats tend to go A B C D or A C B D. They're usually 1 byte per tile and they can't use different palettes per tile (with the exception of one mapper for NES which supports it, but I don't know anything about that), nor can they be flipped horizontally or vertically. Sometimes there will be an attributes byte along with the 4 TSA bytes (and even rarer, there will be other data there, too. I think Kickle Cubicle has a whole bunch of block property data with the TSA data), though it might be separate from the TSA data. Sometimes the 4 bytes for the data will be in 4 different locations, so you have all the A's, all the B's, etc. all in their own groups, like in Faxanadu (which also has attribute and property data in the same area). If a game uses 32x32 pixel blocks, it usually builds the 16x16 pixel blocks and then uses those to build the larger ones, which it does in the same way it built the smaller blocks (like in Ninja Gaiden 2, and quite possibly the other 2 NG games). Other games, like Castlevania, will build the 32x32 pixel blocks directly by defining all 16 tiles used in a large block; they won't bother with the smaller blocks. I would imagine GB is no different, since I've worked with it a bit before and found it to be just like this. A bunch of this info can be found in section 8 of The Art of ROMhacking. It's a pretty good guide to reference for this kind of stuff. Also, if you wanna know about sprite TSA, that document covers that, as well; I haven't worked with it much before and wouldn't be much help, so that's your best bet (it seems to be really similar to block TSA, though, according to the example in the document, but the few times I have worked with it had a few more complex things such as coordinates for where each tile is in relation to a certain point). |
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Parasyte Bullet Bill Level: 35  Posts: 396/514 EXP: 267348 For next: 12588 Since: 05-25-04 Since last post: 104 days Last activity: 32 days |
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| What you are looking for is not "TSA" data, but the format of VRAM. Here's some general information for genesis: _ SCROLL PATTERN NAME _ (edited by Parasyte on 03-30-05 02:07 AM) |
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HyperLamer <||bass> and this was the soloution i thought of that was guarinteed to piss off the greatest amount of people Sesshomaru Tamaranian Level: 118 Posts: 3988/8210 EXP: 18171887 For next: 211027 Since: 03-15-04 From: Canada, w00t! LOL FAD Since last post: 2 hours Last activity: 2 hours |
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Games can store TSA however they want.  If you mean VRAM, I can tell you all you need to know about Gameboy. Tile data is at 0x8000 - 0x9800, containing 384 tiles. The game can select two mapping styles (and of course, switch between them during h-blank, making it hundreds of times more useful). In one, tile 0 is at 0x8000, tile 255 is at 0x8FF0. In the other, 0 is at 0x8800, 255 is at 0x97F0. VRAM contains two tile maps of 32x32 tiles, one at 0x9800 and the other at 0x9C00. The game can choose either one for both the main screen and the window (similar to another layer on SNES, but unfortunately, no transparency - it's a solid bitmap overtop of the other layer, though it can of course be disabled). On GB Colour, a second VRAM bank can be selected which contains another 384 tiles and the attributes for each tile on the map. (Where map position X's tile data is in bank 0 is where its attributes are in bank 1, pretty simple really.) Only one group of 384 tiles can be used at a time, but again this can be switched during hblank. (This is somewhat rare though, since unfortunately you have to switch back to bank 0 to modify the tile map.)So yeah.  |
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