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04-26-24 04:36 PM |
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| Main - ROM Hacking Archives - 65816 ASM tutorial | New thread | Thread closed |
| al2fenrir |
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 Panser Level: 41 Posts: 15/333 EXP: 443731 Next: 36414 Since: 09-20-09 Last post: 4957 days Last view: 4963 days |
Hello Sukasa, the download link to 65_IDE.exe seems broken.
Your info was really valuable though. This is just what I need. ____________________ SUPER MARIO RPG EXPANSION MY PERSONAL BLOG Got any SMRPG Hacking related question? astralgamma.nursing-resource.com |
| Sukasa |
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 Red Birdo Level: 92 Posts: 2027/2112 EXP: 7689510 Next: 67427 Since: 02-19-07 Last post: 4448 days Last view: 3219 days |
I should probably remove that link, I have no intention of trying to fix that horrid program. Notepad is better. |
| MathOnNapkins |
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 Super Koopa Level: 62 Posts: 714/842 EXP: 1935545 Next: 49141 Since: 02-19-07 From: durff Last post: 4488 days Last view: 4011 days |
You know, I always wondered what the hell was in that IDE... ____________________ Zelda Hacking Forum hobbies: delectatio morosa |
| Hamtaro126 |
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 Cheep-cheep Level: 33 Posts: 121/194 EXP: 212842 Next: 16337 Since: 05-02-07 From: Shelton, WA Last post: 2473 days Last view: 2316 days |
What about making these ASM plugins for the newest version of Emerald editor (for people to choose): ca65_6502, ca65_65816, wladx_6502, wladx_65816 and asm6)
I could make them.... Maybe? ____________________ Mah boi, romhacking is what all true warriors strive for! I wonder what's for dinner? |
| al2fenrir |
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Panser Level: 41 Posts: 22/333 EXP: 443731 Next: 36414 Since: 09-20-09 Last post: 4957 days Last view: 4963 days |
This ASM thing is consuming my time. I manage to disassemble the ROM, but now, I don't know how to reassemble.. do I need a programming tool to do this? If so, what programs are best.
Sorry, I'm a noob in programming. ____________________ SUPER MARIO RPG EXPANSION MY PERSONAL BLOG Got any SMRPG Hacking related question? astralgamma.nursing-resource.com |
| boingboingsplat |
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 Giant Koopa [PREFSTRING:wonderful bounciness] Level: 74 Posts: 1038/1292 EXP: 3633789 Next: 19755 Since: 07-23-07 From: Michicola Last post: 4842 days Last view: 4804 days |
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| Sukasa |
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Red Birdo Level: 92 Posts: 2032/2112 EXP: 7689510 Next: 67427 Since: 02-19-07 Last post: 4448 days Last view: 3219 days |
Posted by MathOnNapkins Nothing worthwhile, really. It was slow, the undo function was underthought, and it was one of my earlier VB6 programs. The latter fact alone means you're best off avoiding that program. |
| swamp cecil |
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Newcomer Level: 3 Posts: 1/1 EXP: 71 Next: 57 Since: 02-16-10 Last post: 5182 days Last view: 5181 days |
a couple of nooby questions.
1. what do i do/use to edit the ASM? 2. lets say i want the block that turns mario into cape mario. how do insert it into my rom? do i use block tool, and if yes, then how? 3. i got the LDA #$02 STA $7E0019 RTS code good, but how do i chose which block uses this code? its like making a house, but who is going to live there? |
| boingboingsplat |
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Giant Koopa [PREFSTRING:wonderful bounciness] Level: 74 Posts: 1215/1292 EXP: 3633789 Next: 19755 Since: 07-23-07 From: Michicola Last post: 4842 days Last view: 4804 days |
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| Gil-Galad |
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 Goomba Level: 13 Posts: 26/26 EXP: 10255 Next: 12 Since: 12-08-07 Last post: 5035 days Last view: 5032 days |
Just goes to show you how long I haven't been around here, then I show up and notice a 65816 tutorial. I figured that I'd write something up and then I remembered this book that I have in PDF format, which explains it far better than what I could.
It's called "Programming the 65816 Including the 6502, 65C02 and 65802". Written by David Eyes and Ron Lichty. April 28, 1992. Copyright 2007 Western Design Center, INC. This book describes all of those processors quite well and starts with very basic concepts to assembly programming that even a beginner could possibly understand. Don't get me wrong, there is a learning curve here. However, it's very good and that the book tries not to assume you know everything about basic concepts. For anyone that is used to messing with the 6502 will catch on very fast to this book. Of course it starts with the 6502 because that CPU is pretty much the base of the technology. Even if you don't know 6502 already, I suggest that you don't skip those sections because the core of what you need to know is explained from 6502 and then the 65C02. Of course, the 65802 is a bit different, in that it's constrained by it's 6502 pinout to 64KB, where the 65816 can access up to 16MB. Here is the document for you to read and I believe it will help you. HERE Upon further reflection of this topic: There are a few things to consider and I will point them out. For most of you the primary point of this tutorial is to learn how to assembly hack games and I would say that requires that you "reverse engineer" the ROM. It usually wouldn't be required to disassemble the entire game unless you wished to reverse engineer the entire game as a reference. And use some sort of label commenting for certain lines of code and data. However, this method certainly wouldn't usually give you a re-compilable source code. If you had the original source code and assembler, your job would be much easier. On the other hand, you could extract certain banks out of the ROM image and then disassemble those and comment, such as the FFVI community has done. What I have done for my projects is to manually assemble the code from Notepad and then overwrite the bytes at a select location in the ROM. I have even used a assembler and tricked it by using the address as a base origin and then copy those bytes from the assembled ROM. Of course, now we have Xkas and honestly, I'm not familiar with this assembler at all. I'm considering on learning how to use it for hacks. Then you have debuggers and those can help tremendously in deducing addresses and then you can always find those in the ROM somewhere. So, I suggest getting to know the CPU architecture, opcodes, operands. Learning to how disassemble a bank and then read some code by citing each opcode and operand. After that, you get selective and start tracking down what each routine does specifically. That's all for the general tips. Have fun reading the document! |
| UnderTheSea |
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Newcomer Level: 4 Posts: 1/2 EXP: 192 Next: 87 Since: 08-06-11 Last post: 4640 days Last view: 4640 days |
I used a branch code (beq) and it said it was too many bytes away from the place I wanted it to jump to and gave me an error. How do I fix this so branch codes can be more than -127 to 128 bytes away from the place you want them to go to? |
| Kawa |
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 CHIKKN NI A BAAZZKIT!!! 80's Cheerilee is best pony Level: 138 Posts: 5015/5344 EXP: 30945454 Next: 717527 Since: 02-20-07 From: The Netherlands Last post: 4498 days Last view: 2633 days |
Put the destination closer to the branch instruction. The instruction you try to use is for short jumps only, and that can't be changed.
But you can also use a different kind of jump, that can go farther. ____________________ Wife make lunch - Shampoo Opera - give it a spin Spare some of your free time? <GreyMaria> I walked around the Lake so many goddamn times that my sex drive was brutally murdered Kawa rocks  — byuu |
| UnderTheSea |
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Newcomer Level: 4 Posts: 2/2 EXP: 192 Next: 87 Since: 08-06-11 Last post: 4640 days Last view: 4640 days |
I cannot move it since it has to be in the middle, otherwise I just get more of the same errors from other places that need to go to it.
And I have tried changing: beq PlaceToBranch jmp NextBit With: bne NextBit jmp PlaceToBranch But that gives the error of NextBit being to far away as well. I don't know what else I can do! |
| Toad Shroom |
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Newcomer Level: 4 Posts: 1/2 EXP: 165 Next: 114 Since: 12-08-14 From: Clarksburg, West Virginia Last post: 3389 days Last view: 3389 days |
On DSHack.org, there is a .PDF file on how to do ASM hacks. I once had it. ____________________ The user who will soon have an Post Layout. |
| ShaneM |
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 Snifit Compromised account. Please contact an admin to restore access. Level: 36 Posts: 239/285 EXP: 293486 Next: 14624 Since: 02-17-14 Last post: 3137 days Last view: 2653 days |
Posted by Toad Shroom Please refrain from posting on topics this old unless you have some brand new, relevant information. It prevents board clutter and unnecessary posting. Also, welcome to Board 2! I hope that you enjoy your stay. --ShaneM____________________ At the end, when the day is over, the only one left to face is yourself. Have you been true to yourself and made the most of your day? |
| Main - ROM Hacking Archives - 65816 ASM tutorial | New thread | Thread closed |
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