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Acmlm's Board - I3 Archive - ROM Hacking - SMW Compression? New poll | |
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Smallhacker

Super Koopa
I AM A Group Of Officially Frustrated Younglings, G.O.O.F.Y. MEMBER








Since: 11-17-05
From: Söderhamn, Sweden

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Skype
Posted on 04-13-06 01:53 PM Link | Quote
I've tried to find it myself, but failed.
Does anyone have a description of how SMW's compression format works? According to Lunar Compress, it uses LC_LZ1 (SMWj) and LC_LZ2 (SMW). (What's that "j" anyway? Japanese version? If so, I only need LC_LZ2.)

Please don't say "Just use the Lunar Compress DLL".
spel werdz rite









Since: 11-19-05

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Posted on 04-13-06 03:04 PM Link | Quote
I'm not sure myself, but to try and get a better understanding, I opened up the hex addresses that Lunar Magic tells you where the graphics are.
I sometimes make small or simple GFX files, let LM copress them, and change some bytes to see what happens.
You can try this, and you may or may not start to figure out how it works. This is just a suggestion I have.

Do Yoshi's Island and Zelda3 have the same GFX compression?
Stifu









Since: 11-18-05
From: Your mom's bed

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Posted on 04-13-06 03:21 PM Link | Quote
Originally posted by spel werdz rite
Do Yoshi's Island and Zelda3 have the same GFX compression?

SMK does, at least.
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^(

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Posted on 04-13-06 08:26 PM Link | Quote
Just curious, why isn't using Lunar Compress an option?
spel werdz rite









Since: 11-19-05

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Posted on 04-14-06 04:28 AM Link | Quote
Maybe he's just trying to learn for general knowledge.
I myself do it a lot (perhaps too much).
Smallhacker

Super Koopa
I AM A Group Of Officially Frustrated Younglings, G.O.O.F.Y. MEMBER








Since: 11-17-05
From: Söderhamn, Sweden

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Posted on 04-14-06 04:54 AM Link | Quote
The programming language I'm using doesn't support DLLs. (Well... It does, but not the version I'm using.) Also, I haven't got enough experience with C++ to be able to do what I want to do.
BMF54123
WARNING: MOOD LEVEL CRITICAL








Since: 11-18-05
From: MOOGLES

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Posted on 04-14-06 06:07 AM Link | Quote
So...the Japanese and American versions actually use different compression formats? That's bizarre...
Stifu









Since: 11-18-05
From: Your mom's bed

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Posted on 04-14-06 06:19 AM Link | Quote
Originally posted by BMF54123
So...the Japanese and American versions actually use different compression formats? That's bizarre...

SMW is Nintendo's first SNES game or something, right ? I recall reading they used some kind of beta or early version of their music engine too... So after they released the Japanese version and that the game was still getting translated and stuff for the US release, they had probably improved their compression format by then, as their SNES formats / engines / whatever were still young at the time...
Smallhacker

Super Koopa
I AM A Group Of Officially Frustrated Younglings, G.O.O.F.Y. MEMBER








Since: 11-17-05
From: Söderhamn, Sweden

Last post: 6290 days
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Posted on 04-14-06 08:01 AM Link | Quote
Okay. I figured out most myself and this helped me with the rest.

The program I made can export GFX32 and GFX33 from a ROM perfectly. Probably the other files as well, but I haven't tested those yet.
BMF54123
WARNING: MOOD LEVEL CRITICAL








Since: 11-18-05
From: MOOGLES

Last post: 6288 days
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Posted on 04-14-06 08:20 AM Link | Quote
Keep in mind all graphics in SMW are 3bpp, except for Mario and a couple other things (like berries), so they'll probably appear scrambled even with proper decompression.
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^(

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Posted on 04-15-06 01:02 AM Link | Quote
Unless of course you've converted them to 4BPP in LM.
MathOnNapkins

1100

In SPC700 HELL


 





Since: 11-18-05

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Posted on 04-15-06 02:28 AM Link | Quote
Originally posted by BMF54123
Keep in mind all graphics in SMW are 3bpp, except for Mario and a couple other things (like berries), so they'll probably appear scrambled even with proper decompression.


3bpp is not a format, it's another type of compression. So if you have decompressed something and the product is 3bpp, it is still compressed.
BMF54123
WARNING: MOOD LEVEL CRITICAL








Since: 11-18-05
From: MOOGLES

Last post: 6288 days
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Posted on 04-15-06 05:53 AM Link | Quote
Er, yeah, I knew that.

So, technically, SMW uses "layered" compression...

(edited by BMF54123 on 04-15-06 04:54 AM)
Guy Perfect









Since: 11-18-05

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Posted on 04-15-06 11:39 AM Link | Quote
1) Lunar Compress is a Windows-only app, isn't it? That won't help people developing for the DS. (-:

2) There's a difference between compression and encoding. 3bpp is the encoding. LZ2 is the compression. One of them expresses the data in its simplest form (encoding), and the other exists to make the encoded bit stream smaller (compression)
Unicorn_Poop

Micro-Goomba


 





Since: 12-21-05
From: Knox-Vegas

Last post: 6462 days
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Posted on 04-15-06 02:48 PM Link | Quote
I'm decoding all of Super Metroid right now, and I decoded the compression routine long ago. I'm almost positive that most Nintendo games use the same compression routine, so these notes should be valid for your purposes.

Copy and Paste this into Notepad with the Lucida Console font.

+--------------------------------------------------------------------------------------------------------------+
|=Decompression=Routine=[$80:B0FF-$80:B270]====================================================================|
+--------------+-----+-----------+-------------------------+------------+--------------------------------------+
|=Command=Name=|=Hex=|=Binary====|=Syntax==================|=Range======|=Notes================================|
+--------------+-----+-----------+-------------------------+------------+--------------------------------------+
| | $00 | %00000000 | | | Copies the next (# + 1) bytes from |
| Direct Copy | .. | CMD..... | [%000xxxxx : xxxxx = #] | 1-32 bytes | Compressed Data (CD) to RAM. |
| | $1F | %00011111 | | | |
+--------------+-----+-----------+-------------------------+------------+--------------------------------------+
| | $20 | %00100000 | | | Writes the next byte (# + 1) bytes |
| Byte Fill | .. | CMD..... | [%001xxxxx : xxxxx = #] | 1-32 bytes | deep to RAM. |
| | $3F | %00111111 | | | |
+--------------+-----+-----------+-------------------------+------------+--------------------------------------+
| | $40 | %01000000 | | | Writes the next word (# + 1) bytes |
| Word Fill | .. | CMD..... | [%010xxxxx : xxxxx = #] | 1-32 bytes | deep to RAM. |
| | $5F | %01011111 | | | |
+--------------+-----+-----------+-------------------------+------------+--------------------------------------+
| | $60 | %01100000 | | | Writes the next byte to RAM. Then |
| Sigma Fill | .. | CMD..... | [%011xxxxx : xxxxx = #] | 1-32 bytes | adds 1 to that byte and writes it |
| | $7F | %01100000 | | | again...etc. Writes (# + 1) times. |
+--------------+-----+-----------+-------------------------+------------+--------------------------------------+
| | $80 | %10000000 | | | Copies (# + 1) bytes from the RAM |
| Library Copy | .. | CMD..... | [%100xxxxx : xxxxx = #] | 1-32 bytes | address provided in the next two |
| | $9F | %10011111 | | | bytes. |
+--------------+-----+-----------+-------------------------+------------+--------------------------------------+
| | $A0 | %10100000 | | 1-32 bytes | Much like the Library Copy. The only |
| EORed Copy | .. | CMD..... | [%101xxxxx : xxxxx = #] | $7F:0000 - | difference is that all data copied |
| | $BF | %10111111 | | $7F:FFFF | is EORed with %11111111. |
+--------------+-----+-----------+-------------------------+------------+--------------------------------------+
| | $C0 | %11000000 | | 1-32 bytes | Subtracts next byte from Y, the RAM |
| Minus Copy | .. | CMD..... | [%110xxxxx : xxxxx = #] | 0-255 from | offset, and copies (# + 1) bytes to |
| | $DF | %11011111 | | current Y | current Y. Can copy last tile. |
+--------------+-----+-----------+-------------------------+------------+--------------------------------------+
| | $E0 | %111 000 00-->Bits 8 9 of X (aka #) | 1-1024 | Extends the range of previous CMDs |
| | | ||| --------------------- | bytes | from 1-32, to 1-1024 bytes deep. |
| | | CMD----->Command Code. Any one | | |
| Extended CMD | .. | of the previous 7 CMD | $7F:0000 - | Specifically, Bits 7-5 flag the ECMD,|
| | | patterns can go here. | $7F:FFFF | & Bits 4-2 are interpreted as a CMD. |
| | | --------------------- | RAM | Bits 1-0 & the next byte are treated |
| | $FE | %111 111 11 | | as a 10-bit value for X, aka #. |
+--------------+-----+-----------+-------------------------+------------+--------------------------------------+
| | | | | | |
| Terminate SR | $FF | %11111111 | [%11111111] | ---- | Terminates Sub Routine |
| | | | | | |
+--------------+-----+-----------+-------------------------+------------+--------------------------------------+
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: 6288 days
Last view: 6288 days
Posted on 04-15-06 06:12 PM Link | Quote
Originally posted by BGNG
1) Lunar Compress is a Windows-only app, isn't it? That won't help people developing for the DS. (-:

An SMW editor for the DS? ...Hey, that's not a half bad idea.

(edited by HyperMackerel on 04-16-06 04:08 AM)
Guy Perfect









Since: 11-18-05

Last post: 6290 days
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Posted on 04-15-06 06:36 PM Link | Quote
Originally posted by HyperMackerel
Just curious, why isn't using Lunar Compress an option?

Well there you have it, then. A reason. (-:
Unicorn_Poop

Micro-Goomba


 





Since: 12-21-05
From: Knox-Vegas

Last post: 6462 days
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Posted on 04-15-06 10:44 PM Link | Quote
Wow, I didn't relize it, but the forum butchered my notes. In Notepad, just line up the verticle bars ( | ) with the pluses and you should have a nice table.

Of note, the address in the table's title is the Decompression Routine's ROM address in Super Metroid only.

Also, I forgot to mention the data used to control the Decompression Routine's Input and Output is located directly after the JSLs that lead to the execution of the routine. So, if you don't know where to locate this data, just look for JSLs to SMW's Decompression Routine. You can find the routine's address if you watch where in the program the game writes new level data to RAM.
FreeDOS +

Giant Red Koopa
Legion: freedos = fritos








Since: 11-17-05
From: Seattle

Last post: 6287 days
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Posted on 04-16-06 03:17 PM Link | Quote
Originally posted by Unicorn_Poop
Copy and Paste this into Notepad with the Lucida Console font.

Or the better option and use <tt> plus &nbsp; (the board doesn't like <pre>, so go into a text editor and replace ' ' with '&nbsp;'):

      +--------------------------------------------------------------------------------------------------------------+
      |=Decompression=Routine=[$80:B0FF-$80:B270]====================================================================|
      +--------------+-----+-----------+-------------------------+------------+--------------------------------------+
      |=Command=Name=|=Hex=|=Binary====|=Syntax==================|=Range======|=Notes================================|
      +--------------+-----+-----------+-------------------------+------------+--------------------------------------+
      |              | $00 | %00000000 |                         |            | Copies the next (# + 1) bytes from   |
      | Direct Copy  |  .. |  CMD..... | [%000xxxxx : xxxxx = #] | 1-32 bytes | Compressed Data (CD) to RAM.         |
      |              | $1F | %00011111 |                         |            |                                      |
      +--------------+-----+-----------+-------------------------+------------+--------------------------------------+
      |              | $20 | %00100000 |                         |            | Writes the next byte (# + 1) bytes   |
      | Byte Fill    |  .. |  CMD..... | [%001xxxxx : xxxxx = #] | 1-32 bytes | deep to RAM.                         |
      |              | $3F | %00111111 |                         |            |                                      |
      +--------------+-----+-----------+-------------------------+------------+--------------------------------------+
      |              | $40 | %01000000 |                         |            | Writes the next word (# + 1) bytes   |
      | Word Fill    |  .. |  CMD..... | [%010xxxxx : xxxxx = #] | 1-32 bytes | deep to RAM.                         |
      |              | $5F | %01011111 |                         |            |                                      |
      +--------------+-----+-----------+-------------------------+------------+--------------------------------------+
      |              | $60 | %01100000 |                         |            | Writes the next byte to RAM. Then    |
      | Sigma Fill   |  .. |  CMD..... | [%011xxxxx : xxxxx = #] | 1-32 bytes | adds 1 to that byte and writes it    |
      |              | $7F | %01100000 |                         |            | again...etc.  Writes (# + 1) times.  |
      +--------------+-----+-----------+-------------------------+------------+--------------------------------------+
      |              | $80 | %10000000 |                         |            | Copies (# + 1) bytes from the RAM    |
      | Library Copy |  .. |  CMD..... | [%100xxxxx : xxxxx = #] | 1-32 bytes | address provided in the next two     |
      |              | $9F | %10011111 |                         |            | bytes.                               |
      +--------------+-----+-----------+-------------------------+------------+--------------------------------------+
      |              | $A0 | %10100000 |                         | 1-32 bytes | Much like the Library Copy. The only |
      | EORed Copy   |  .. |  CMD..... | [%101xxxxx : xxxxx = #] | $7F:0000 - | difference is that all data copied   |
      |              | $BF | %10111111 |                         | $7F:FFFF   | is EORed with %11111111.             |
      +--------------+-----+-----------+-------------------------+------------+--------------------------------------+
      |              | $C0 | %11000000 |                         | 1-32 bytes | Subtracts next byte from Y, the RAM  |
      | Minus Copy   |  .. |  CMD..... | [%110xxxxx : xxxxx = #] | 0-255 from | offset, and copies (# + 1) bytes to  |
      |              | $DF | %11011111 |                         | current Y  | current Y. Can copy last tile.       |
      +--------------+-----+-----------+-------------------------+------------+--------------------------------------+
      |              | $E0 | %111 000 00-->Bits 8 9 of X (aka #) | 1-1024     | Extends the range of previous CMDs   |
      |              |     |      |||      --------------------- |      bytes | from 1-32, to 1-1024 bytes deep.     |
      |              |     |      CMD----->Command Code. Any one |            |                                      |
      | Extended CMD |  .. |               of the previous 7 CMD | $7F:0000 - | Specifically, Bits 7-5 flag the ECMD,|
      |              |     |               patterns can go here. | $7F:FFFF   | & Bits 4-2 are interpreted as a CMD. |
      |              |     |               --------------------- |     RAM    | Bits 1-0 & the next byte are treated |
      |              | $FE | %111 111 11                         |            | as a 10-bit value for X, aka #.      |
      +--------------+-----+-----------+-------------------------+------------+--------------------------------------+
      |              |     |           |                         |            |                                      |
      | Terminate SR | $FF | %11111111 |       [%11111111]       |    ----    | Terminates Sub Routine               |
      |              |     |           |                         |            |                                      |
      +--------------+-----+-----------+-------------------------+------------+--------------------------------------+
Raccoon Sam

Boomerang Brother
Custom Title








Since: 11-20-05
From: Correct

Last post: 6288 days
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Posted on 04-16-06 04:34 PM Link | Quote
So uh.. Is there a way to make a ROM decompressor so we Mac user could edit the Gfx too..?
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Acmlm's Board - I3 Archive - ROM Hacking - SMW Compression? |


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