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| Acmlm's Board - I3 Archive - SMW Hacking - ASM works differently depending on emulator? |
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rubixcuber Mole                    Since: 09-08-06 From: St. Louis, MO Last post: 6430 days Last view: 6430 days |
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| I have some custom powerups in the hack that I'm working on and I was having trouble getting one of them to work. So I fired up Snes9XW which I use for debugging and went to trace it... and it worked just fine. I'm loading the exact same file in ZSNES and Snes9XW with different results. I replaced all my code with NOP's and added in an increment adding to the number of coins just to test it out. In ZSNES nothing happens at all. In Snes9XW your coins increment constantly if you hold x or y. Any ideas? | |||
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: 6322 days Last view: 6321 days |
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| yeah. ZSNES WIP is the only ZSNES that allows you to access the controller input correctly from upper banks. I learned that the hard way with the conbtroller override. just get the latest WIP of ZSNES and try that. | |||
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rubixcuber Mole Since: 09-08-06 From: St. Louis, MO Last post: 6430 days Last view: 6430 days |
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| Thanks so much! I was pulling my hair out wondering what was wrong with my code. I worked on it for about 2 hours before I found out it worked fine in Snes9x. Oh well.
EDIT: Hmm, that only fixed part of the problem actually. It still won't do anything. I even edited all of the parts that reference the controller input and just had it increment number of coins no matter what and it still works in Snes9x and not ZSNES. At this point with my code edited out all I've done is taken the original routine for handling pressing x/y in SMW and added a JSL to a routine which increments the number of coins and returns. (edited by rubixcuber on 10-01-06 03:01 PM) (edited by rubixcuber on 10-01-06 03:01 PM) |
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HyperHacker Star Mario Finally being paid to code in VB! If only I still enjoyed that. <_< Wii #7182 6487 4198 1828 Since: 11-18-05 From: Canada, w00t! My computer's specs, if anyone gives a damn. STOP TRUNCATING THIS >8^( Last post: 6321 days Last view: 6321 days |
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| Are you sure you loaded the right file, and are there any IPS patches with the same name as your ROM that might be getting automatically applied by the emulator?
BTW, random ASM question since I'm here (it'd kind of on topic  ): Is SRAM executable? Can I just load a bunch of code into it and run it? |
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rubixcuber Mole Since: 09-08-06 From: St. Louis, MO Last post: 6430 days Last view: 6430 days |
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| Absolutely sure it's the right file. I've started making changes to something else each time and making sure those changes show up in both emulators and they do. No other roms or ips files in the directory. I've never had a problem like this before.
SRAM is executable. (I ran a test to make sure) If you do say: LDA $#6B STA $00 JSL $000000 It will run 6B (RTL) and return. |
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Stifu Since: 11-18-05 From: Your mom's bed Last post: 6323 days Last view: 6321 days |
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| Personally, although bsnes isn't perfect, it's so accurate that I'd take it as the ultimate reference about whether your hack works right or not, unless you can test your stuff on real hardware (flash cart or other units).
In other words, if it works fine with bsnes, whatever about the other emulators, as there are very strong chances they're wrong if they don't behave the same... and if they're good/popular emulators, they'll get fixed later. (edited by Stifu on 10-01-06 06:41 PM) |
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rubixcuber Mole Since: 09-08-06 From: St. Louis, MO Last post: 6430 days Last view: 6430 days |
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| Well, I tried BSNES and it doesnt work there, so I guess I'm going to rewrite my powerup engine. Thanks for the suggestions. | |||
MathOnNapkins  1100  In SPC700 HELL Since: 11-18-05 Last post: 6321 days Last view: 6321 days |
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| First, I'm assuming you're trying to read from the parallel controller registers at $4218 - $421F or the serial registers (forget their addresses). Second, I'm going to assume you are reading them outside of V-blank. That's likely.
The data from the controllers is only supposed to be available after so many cycles of V-blank. After V-blank ends the data becomes random static pretty much. Has to be a flaw of Snes9x, it's too lenient on controller input and when it can be read. This doesn't change the fact that you were trying to do something illegal though. However, almost any game for the SNES will buffer this data into it's own memory space so try to find those WRAM addresses and use them. |
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HyperHacker Star Mario Finally being paid to code in VB! If only I still enjoyed that. <_< Wii #7182 6487 4198 1828 Since: 11-18-05 From: Canada, w00t! My computer's specs, if anyone gives a damn. STOP TRUNCATING THIS >8^( Last post: 6321 days Last view: 6321 days |
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Those addresses should be in the SMW memory map at SMWCentral.
Originally posted by rubixcuber That doesn't ensure it works on a real SNES, unless you tried it on one. But when I asked that I was thinking Game Boy (where putting code in SRAM could be a nice way to make it accessible from any ROM bank) as opposed to SNES (where SRAM is in its own bank anyway), so it's probably not really useful. |
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rubixcuber Mole Since: 09-08-06 From: St. Louis, MO Last post: 6430 days Last view: 6430 days |
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| Hyperhacker: On a real SNES? I have no idea. You didn't say anything about a real SNES. Do we care if it works on a real SNES? I haven't looked at GB in a while, but I think you could execute code in RAM in the same fashion.
MathOnNapkins: Did you read my posts? I edited out all reference to controller data at all. I just have an INC statement incrementing the number of coins. On ZSNES coins stay put, on Snes9x coins increment. All code referencing controller data is the original SMW code. |
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Stifu Since: 11-18-05 From: Your mom's bed Last post: 6323 days Last view: 6321 days |
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Originally posted by rubixcuber Of course. Even if no one plays your hack on a real console, it still matters. Emulators are obviously modeled after real consoles, so if your stuff doesn't work on a real console but works with certain emulators, then those emulators are wrong. And if they're wrong, they may get corrected afterward, resulting in your hack not working properly anymore... Besides, it's not like there's any drawback to programming something properly so it works on real hardware and with accurate emulators. |
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rubixcuber Mole Since: 09-08-06 From: St. Louis, MO Last post: 6430 days Last view: 6430 days |
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| Ok, but the works on a real SNES was about HyperHackers SRAM question, not about my problem. Executing SRAM works fine on any emulator, but I have no idea if it works on a real SNES. I have no idea if any of the hacks posted here work on a realy SNES. That's all I meant. | |||
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MathOnNapkins 1100 In SPC700 HELL Since: 11-18-05 Last post: 6321 days Last view: 6321 days |
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| Well I would have loved to help you more but you didn't even post any code so don't expect much in that way. Just b/c it doesn't work on BSNES and ZSNES doesn't mean the code is faulty. Trying it out on a real snes would be the best way to check. But again you posted no code so you left us guessing.
Regarding executing from SRAM: I'm pretty sure you meant LDA #$6B STA $700000 JSL $700000 Otherwise we're talking about executing from WRAM, which is known to work. The SRAM, being of a different type of RAM, might be questionable in that regard. |
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rubixcuber Mole Since: 09-08-06 From: St. Louis, MO Last post: 6430 days Last view: 6430 days |
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| As I said, there's only an increment of number of coins. INC $0DBF or EEBF0D. That's it. That is all the code I have written (after reverting to a backup). On Snes9x this gets executed and increments the number of coins. On ZSNES I have to assume this gets executed and... does I don't know what. This increment is just inserted into an existing SMW routine. I'll edit in which one and where it is when I get home later.
And, yeah, I did mean $700000. And that's what I meant about not knowing if it works on a real SNES. WRAM and SRAM are different, but as far as executing code in an emulator I think they both work just fine. I'll run some more tests when I get home. (edited by rubixcuber on 10-03-06 10:24 AM) |
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HyperHacker Star Mario Finally being paid to code in VB! If only I still enjoyed that. <_< Wii #7182 6487 4198 1828 Since: 11-18-05 From: Canada, w00t! My computer's specs, if anyone gives a damn. STOP TRUNCATING THIS >8^( Last post: 6321 days Last view: 6321 days |
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| Well like I said it doesn't matter anyway, unless you're really really short on space and can save a lot by compressing routines and decompressing them to SRAM there isn't much point. (And chances are graphics would be better used for that, because they'd compress better.) It is important that your hacks work on real hardware. but this specific hack has no purpose I can think of on a SNES, so there's no point testing it.
As for your problem, try INC $7E0DBF. Could be some problem with the way one of the emulators handles the data bank register. |
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rubixcuber Mole Since: 09-08-06 From: St. Louis, MO Last post: 6430 days Last view: 6430 days |
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| There isn't an INC, long in the 65816 instruction set is there? And anyways INC $0DBF works and I've had all sorts of different code there that doesnt seem to work. Here's exactly what I've done:
At x4E6E I've added a JSL to a routine I wrote. As of now the routine does only this: INC $0DBF RTL In Snes9x the coin counter increments each time this routine is called. I'm not really sure what ZSNES/BSNES are doing... |
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HyperHacker Star Mario Finally being paid to code in VB! If only I still enjoyed that. <_< Wii #7182 6487 4198 1828 Since: 11-18-05 From: Canada, w00t! My computer's specs, if anyone gives a damn. STOP TRUNCATING THIS >8^( Last post: 6321 days Last view: 6321 days |
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| Well if there isn't then just do it manually (LDA, INC, STA, possibly a PHA and PLA if need be).
Also if both ZSnes and BSnes (the most accurate emulator yet) do the same thing, it's probably fairly safe to assume they're right. |
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rubixcuber Mole Since: 09-08-06 From: St. Louis, MO Last post: 6430 days Last view: 6430 days |
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| Yeah, I'm pretty sure they are right, but I want to know why they behave differently and how I can fix it. With any luck I'll figure it out on my own eventually.
I tried LDA, INC, STA from 7E with the same results. Works on Snes9x, not on ZSnes/BSnes. |
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HyperHacker Star Mario Finally being paid to code in VB! If only I still enjoyed that. <_< Wii #7182 6487 4198 1828 Since: 11-18-05 From: Canada, w00t! My computer's specs, if anyone gives a damn. STOP TRUNCATING THIS >8^( Last post: 6321 days Last view: 6321 days |
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| In that case it might be worth putting a BRK at the beginning of the routine, or in place of the branch that should be calling it, and seeing if it ever even gets executed.
You did ensure everything is set up the same though, right? No hacks enabled, same ROM and SRAM, no save states, and no auto-patched IPS patches? |
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rubixcuber Mole Since: 09-08-06 From: St. Louis, MO Last post: 6430 days Last view: 6430 days |
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| Yep, made sure of all of that. I tried the BRK. I put the BRK in the routine and nothing changed on ZSNES, but it executed the BRK on Snes9x if you hit X/Y. I put a break in the routine which I added the jump to (which is original SMW code) and on ZSNES... still nothing happened. Perhaps Snes9x and ZSNES handle controller input differently enough that different routines get called? |
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| Acmlm's Board - I3 Archive - SMW Hacking - ASM works differently depending on emulator? |
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