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| 0 users currently in SMW Hacking. |
| Acmlm's Board - I3 Archive - SMW Hacking - So You Wanna Learn ASM [ASM howto] |
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DahrkDaiz Nipper Plant U wan hax Mario?!                  Since: 11-17-05 Last post: 6284 days Last view: 6283 days |
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And the BNE, BEQ, etc etc aren't Break, they're Branch (Branch if Equal, Branch if Not Equal). Might want to fix that  |
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Sukasa Birdo Not quite as active as before. Xkeeper supporter Xk > ||bass I IP Banned myself! Twice!     Since: 11-17-05 From: Somewhere over there Last post: 6284 days Last view: 6282 days |
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| ...Right. Will do. Thanks for letting me know that.
EDIT: What do you guys want me to do next? (edited by Sukasa + on 07-07-06 12:58 PM) |
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Giga_Bowser_009 Red Paragoomba Since: 04-16-06 Last post: 6501 days Last view: 6501 days |
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| How about a tutorial that tells us how to make custom enemies/bosses in SMW? That's something I'd like to learn how to do. | |||
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Sukasa Birdo Not quite as active as before. Xkeeper supporter Xk > ||bass I IP Banned myself! Twice! Since: 11-17-05 From: Somewhere over there Last post: 6284 days Last view: 6282 days |
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| I meant for this tutorial.
So... NO. |
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DahrkDaiz Nipper Plant U wan hax Mario?! Since: 11-17-05 Last post: 6284 days Last view: 6283 days |
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| BVC and BVS Are Branch if oVerflow is Set/Clear.
Basiclly, if an addition/subtraction operation causes a byte to go below/over 0 (like FE + 3 or 3 - 6) the V flag is set, meaning there was an over/underflow. (edited by DahrkDaiz on 07-09-06 08:58 AM) |
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Tatrion <_<; Since: 11-17-05 Last post: 6284 days Last view: 6283 days |
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Originally posted by Sukasa + Hmm... could you please make a "cheat sheet" of opcodes with their names, shorthand, bit lengths, and definitions? That would help me out a lot personally 
Either that, or directing me to one would be great. (edited by Tatrion on 07-09-06 09:36 AM) |
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Sukasa Birdo Not quite as active as before. Xkeeper supporter Xk > ||bass I IP Banned myself! Twice! Since: 11-17-05 From: Somewhere over there Last post: 6284 days Last view: 6282 days |
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| I'l post the link to 65816ref.hlp. Note that it contains every single opcode, so it's more complesz than this tutorial, and doesn't explaine the opcodes all that well. | |||
spel werdz rite Since: 11-19-05 Last post: 6284 days Last view: 6282 days |
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| Any chance on giving info about the Program Bank and Data Bank Registers?
I'm trying to make custom palettes for my SMB-SMAS hack, but I'm not that good with the PBR. Also, I have one question. How does LDA, (x or y) know to load from a RAM address or ROM address? |
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ziratha Koopa Since: 11-19-05 Last post: 6301 days Last view: 6283 days |
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| What might help out would be to take a couple of the various hacks, post their codes and then comment and demonstrate how they do what they do. Even simple hacks, like some of the blocks and such. I know you have that one, but more is better. | |||
Goldensunboy Snifit  Since: 12-30-05 From: Georgia Last post: 6288 days Last view: 6287 days |
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| How do you write data to SRAM? Is it just a bunch of ram addresses at a different bank? Or is there some special method involved? | |||
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Kailieann Since: 11-18-05 Last post: 6282 days Last view: 6282 days |
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| SRAM is bank 0x70 | |||
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3.14159265358979323846 Red Paragoomba  Since: 05-30-06 From: China Last post: 6292 days Last view: 6293 days |
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| For some strange reason I can't visit freeweb or smwcentral, so the 65816ref.hlp link does not work for me.
...Could anybody re-upload it on rapidshare or savefile etc. ? Thanks a lot [edit] Oh I have forgot to say that Geo****ties is not aviliable for me, either. Sorry. (Get a proxy to visit so all of the above voids) (edited by 3.14159265358979323846 on 08-14-06 04:21 AM) (edited by 3.14159265358979323846 on 10-05-06 12:36 AM) |
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Goldensunboy Snifit Since: 12-30-05 From: Georgia Last post: 6288 days Last view: 6287 days |
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Sup' 
...the link does work, right...?  It works for me.(edited by Goldensunboy on 08-13-06 01:32 PM) (edited by Goldensunboy on 08-14-06 06:06 AM) |
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Sukasa Birdo Not quite as active as before. Xkeeper supporter Xk > ||bass I IP Banned myself! Twice! Since: 11-17-05 From: Somewhere over there Last post: 6284 days Last view: 6282 days |
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| Spel Werdz Rite: The CPU doesn't know, but the address will point to either a ROM or RAM address, as banks 7E and 7F are the RAM, but for the CPU they're just banks that seem to be able to written to as well. | |||
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Goldensunboy Snifit Since: 12-30-05 From: Georgia Last post: 6288 days Last view: 6287 days |
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| How does the game go about loading data from rom, indexed with the direct page number? (and Y, but I know how it does THAT) I don't understand it at all. | |||
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Sukasa Birdo Not quite as active as before. Xkeeper supporter Xk > ||bass I IP Banned myself! Twice! Since: 11-17-05 From: Somewhere over there Last post: 6284 days Last view: 6282 days |
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That's a more advanced command... it's
LDA [$xx], YFor example: Your direct page for this example is $7E00. Say at $7E0000, you have a big-endian 24-bit address to $034F78. Now, if Y is $0000, and you execute the instruction LDA [$00], Y, what do you think will be loaded? The value at $7E0001, or the value at $034F78? If you guessed the latter, you are right. That's because LDA [$00], Y loads a referenced value, incremented by Y. In other words, that instuction loads up the 24-bit address at $7E0000, and then loads the 8- or 16-bit value at the address just loaded PLUS the Y, similar to (LDA $xxxxxx, X). Clear as mud, right? |
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Goldensunboy Snifit Since: 12-30-05 From: Georgia Last post: 6288 days Last view: 6287 days |
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| Clear as a tarpit in the cold of January.
Let me get this straight... (time for ME to make it clear as mud  )
-Is the direct page register 8-bit or 16-bit? -Does it load a 3-byte value from a pointer stored in ram after adding the [$xx] to the direct page, then indexes that with Y? (because that's what I got out of what you said) -All I've seen this used for was to load data from the rom. However, I wouldn't be surprised if my guess that the rom was stored in the first (few?) bank(s) of ram. Is my guess right? -In SMW (unheadered, if you ever want to search for this), you can find this, pertaining to storing a byte to the level's map16 low byte table, and I was wondering about the mechanics of how this code does what it does: $00/C0EF 97 6B STA [$6B],y[$7E:C987] Y:0187 P:envMxdizC Where does the 6B come into play, and what do you think the direct page must have been for it to store whatever to $7E:C800 (disregarding the 16-bit Y index)? If my presumption that the direct page number being 16-bit is correct, would it be (big endian) C87E? Or (again) is the direct page something unknown, and it ends up loading a pointer to $7E:C800 from the direct page + 6B? Gosh, I made less sense that you did, I'm sorry if you can't read it. |
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Sukasa Birdo Not quite as active as before. Xkeeper supporter Xk > ||bass I IP Banned myself! Twice! Since: 11-17-05 From: Somewhere over there Last post: 6284 days Last view: 6282 days |
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| The direct page register is 16-bit, and coupled with a one byte address, becomes $dd:ddbb, where dddd is the direct page register and bb is the address byte.
Alsxo, the line $00/C0EF 97 6B STA [$6B],y[$7E:C987] Y:0187 P:envMxdizC Means that at the direct page + $6B is the 24-bit address $7E:C987. So, if the direct page was $7E00, then at $7E006B would be $87 $C9 $7E. |
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RDOG Goomba  Since: 11-17-05 From: London, Ontario, Canada Last post: 6312 days Last view: 6307 days |
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| Can you tell me how to display sprite tiles on the screen? | |||
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Goldensunboy Snifit Since: 12-30-05 From: Georgia Last post: 6288 days Last view: 6287 days |
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Heh, after all those questions, I make an answer for someone.  Ah, thanks very much Sukasa! That was wonderful of you to help me. However in your demonstration you forgot that the destination was $7E:C800, it was $7E:C987 because Y changed the destination. But that doesn't matter, as I understand now.
Ringodoggie, sprite tiles can only be displayed when they are loaded to the sprit tile OAM, which starts at $7E:0300. There is one entry per 8x8 tile, consisting of four bytes per tile. Since the sprite number must be indexed, so must the tiles, so use the Y index (whichever one's told to you in Mikeyk's tutorial) to load it. (STA $7E030#, Y, where # is 0, 1, 2, or 3)You store the X position relative to the screen border at 7E0300, Y; you store the Y position relative to the screen border to 7E0301, Y; you store the tile number to 7E0302, Y; you store the tile properties to 7E0303, Y. The tile properties are in a format called "xyppccct", where the letters here are individual bits in a byte: X bit: Flip 8x8 tile horizontally. Y bit: Flip 8x8 tile vertically. PP bits: Priority, there are four levels of priority. CCC bits: Palette bits, set them appropriately to make the tile use palettes 0-7 (add 8 and look at the palette editor to see them in Lunar Magic) T bit: Decides whether the tile number should be loaded from page one or two. Take the bits you want to set, and add only the set ones up, don't add disabled bits (this is in hex): X..Y..P..P..C..C..C..T 80.40.20.10.8..4..2..1 You must then increment the Y register four times to set up the data for the next tile to be drawn. If you are trying to call this data from a block code or something, it may be tougher, but I would imagine that it would be alright to use Mikeyk's library codes (at least some of them, not sure which ones) to get what you need to set up some things like what's in Y. If you are trying to call the graphics in a sprite code, just follow his document on the steps on how to do that. (edited by Goldensunboy on 08-16-06 08:12 PM) |
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| Acmlm's Board - I3 Archive - SMW Hacking - So You Wanna Learn ASM [ASM howto] |
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