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| 0 users currently in SMW Hacking. |
| User | Post |
| Sukasa Posts: 2035/2068 |
Well, yeah. The thing is, I wanted to draw a direct line between the 24-bit text address and the hex.
besides, I always use 24-bit addresses anyways  |
| Kailieann Posts: 782/808 |
Originally posted by Pointlessly long name 85 19 |
| Sukasa Posts: 2033/2068 |
Hm, X816ii2F works fine for me
Okay... It's mostly pretty easy. I'm going to show you how to do this in hex: LDA #$02
Okay, so this is how you'd do the first one: A9 02 Now, A9 is the hex version of LDA #$__ It can be LDA #$xx or LDA #$xxxx, depending on the processor bit width for the accumulator. 02 in that represents #$02. No biggie there. then comes STA $7E0019. Pay close attention! 8F 19 00 7E 8F is, IIRC (I'm tired right now), STA $xxxxxx 19 00 7E is the address to store to. see how it's order is reversed? All numbers in 65c816 ASM are like that. Thus, 19 00 7E becomes 7E 00 19 when not reversed. Lastly, RTS. 60 this is because 60 is RTS in hex, and there are no extra numbers to be had with this command. |
| C:/DOS/RUN Posts: 26/31 |
Hey, can you teach us how to do this in hexadecimal? Because I understood the tutorial, but I can't find a compiler for windows that works.
Edit: I may have found a ASM compiler that works. It is called FASM. Edit2: No, it does not work. |
| Sparx Posts: 482/529 |
Oh, sure. You've made it so that I can, I just have to re-code them and stuff so they work. I had so many blocks I was going to make =) |
| Sukasa Posts: 1673/2068 |
You're welcome 
BTW, can you send me any blocks you make that you think would be good for inclusion in BTO? I'd appreciate it muchly. |
| Sparx Posts: 481/529 |
Ok, I get it now. As would $01 go 2 after the $01 and so on. Thanks for the help with that, I was wondering why all of my custom blocks would just screw up |
| Sukasa Posts: 1672/2068 |
break = branch for me
And yes, BEQ $00 would beak to the very next instruction, as you said. |
| Sparx Posts: 480/529 |
So after BEQ with $00 next to it means the byte after $00? If that's the case, no wonder. I've been putting $0Y/ $0X (random numbers), thinking that it would branch to that offset number. And do you mean to put branch where break is?  |
| Sukasa Posts: 1661/2068 |
Take the next byte RIGHT AFTER the Break command's data byte. $00 means the very next operation, as if the break didn't exist. add or subtract byte as nessesary until you get to you target opcode's beginning in the hex file, and use that as your datra byte. Note that this nuber ius signed, and $80 to $FF is considered negative. |
| Sparx Posts: 475/529 |
I was putting CMP #$(whatever) and right after, BEQs and/or BNE's. I guess I get it, but I guess I worded wrong, although your information helps a little.
It's the branching. Where does it branch to/ how do I get it to branch some where? Like the labels in a compiler... but how do I "branch to a label" in hex? |
| Kailieann Posts: 354/808 |
Depends on what you're trying to do with it.
On its own, the CMP command doesn't do much. All it does is set some of the processor flags, which isn't going to produce noticable results on its own. You can, however, use the newly set flags for branch statements. For example, say your accumulator was 4, and you compared it to the number 3 using CMP #$03. This will set the Carry flag, which can then be used with BCC/BCS (Branch if Carry Clear/Set). And, I do all my assembly by hand too. |
| Sparx Posts: 473/529 |
Ok, I read the tutorial, and it's much easier to do it hex for me, as I couldn't get ANY compilers to work on my computer  But anyways, I can make an average already made block easy, I can use most commands easily, but I can't figure how to get the CMP command right. Can somebody help? |
| Kailieann Posts: 346/808 |
It was originally in the Advanced SMW Hacking forum. Which was eventually converted into an Advanced general rom hacking forum. Which was later merged with the regular rom hacking forum. |
| Sukasa Posts: 1644/2068 |
I must have been moved there by accident, because it IS an SMW hacking thread. BBGen,txt mentioned there is still hosted by me too, I never took it down. |
| Goldensunboy Posts: 152/287 |
Huh, why was that in ROM hacking? I guess that's why I didn't see it...
I'll try to do something with this once I get the chance, I have many higher-priority things to do now and this week. It seems like it could be interesting. |
| Kailieann Posts: 343/808 |
Sprite-creating routine disassembly |
| Goldensunboy Posts: 151/287 |
I was trying to do some things with sprite tool (I'm still at newbie at sprite hacking, bear with me), and I just can't figure out how to create another sprite.
Are there certain tables that should be written to? If so, which ones? Also, is there a subroutine that does this automatically if I call it, and if so, what values should I store where? ($04-$09, or A/X/Y, or some table, perhaps) |
| Sukasa Posts: 1608/2068 |
That woudl have been nice, but not knowing what they coudl have put in there, I am quite happy to use the 65c816 for all my needs.
But seriously, they should have used the SA-1 in place of the 65c816 (or 5A22, since that has all the features in use by the SNES 65c816...), because the instruction set was the same, but the clock speed was an ample 10Mhz. That and the SA-1 is also apparently the reporting name for some russian Missile at NATO. |
| Glyphodon Posts: 351/536 |
This is a good article.
I wish Nintendo put two processors inside the SNES, one top-of-the-line processor for new stuff and one 6502 for backwards compatibility. And then they could interupt each other and all kinds of dual-processing hilarity would ensue. That would have been so great. |
| This is a long thread. Click here to view it. | |
