Posted: 9/11/2006 9:47 PM
Post subject: Hex editing guide
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Mitjitsu
He/Him
Banned User
Joined: 4/24/2006
Posts: 2997
TAS of 2007 N64 TAS of 2007
I want to bring it up because it may prove invaluabe to someone whose hex-editing first time round becuase it took me a while to figure it out. No this is not a how to or how do I hex edit, this is a guide that would make hex editing a little easier. I think it would be useful if there was some chart showing what each of the symbols mean. 1. FF = No input 2. 00 = All buttons pressed (including all four direction keys) 3. FB = left arrow key 4. F7 = right arrow key 5. FD = down arrow key 6. Fe = Up arrow key 6. EF = A button 7. DF = B button 8. BF = C button 9. 7F = Start I won't cover X,Y and Z buttons since there rarely used in Tases I don't personally know what combinations such as A+B are but figuring out a direction and button should be easy such as A+Right which is E7. Please add on folks I know there is a farely vague hex editing guide but it only says what FF is. For folks who've never hex edited before tell me if you think/found this mildly useful. I'll figure out button combinations later unless any of you know. One slighty embarassing thing I have to ask is how do you locate a specific frame in a movie via a hex editor, and to all you pros please don't flame me for bringing up this topic.
Posted: 9/11/2006 9:52 PM
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LagDotCom
Joined: 3/7/2006
Posts: 720
Location: UK
Button combinations are pretty obvious, you OR the flags together... that's what you're really looking at here, a bunch of flags. For some reasons Gens likes them to mean that 1=off and 0=on, but they're still flags. 
7 6 5 4 3 2 1 0
S C B A R L D U
So just A = 16 -> $10 -> $EF as stated before. ORing some numbers together... say pressing Down, B and C at the same time is easy too. 2 + 32 + 64 -> $62 -> $AD.
Voted NO for NO reason
Posted: 9/11/2006 10:03 PM
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Highness
Player (71)
Joined: 8/24/2004
Posts: 2562
Location: Sweden
We have some tools for easier hexediting you know. ;)
Posted: 9/11/2006 10:08 PM
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Mitjitsu
He/Him
Banned User
Joined: 4/24/2006
Posts: 2997
TAS of 2007 N64 TAS of 2007
Don't you have to pay for these advanced tools and what are they anyway. The advanced hex editors restrict you to what you can do. I just use a basic free hex editor. I tried examing some .M64 code and it completely blew my mind as to what that stuff meant and I have no idea as to how many bits are needed to store a frame of data as opposed to 3 on Gens.
Posted: 9/11/2006 10:26 PM
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DeHackEd
Emulator Coder, Site Developer, Former player
Joined: 11/6/2004
Posts: 833
Have you viewed the site's Hex Editing guide or the M64 format specs?
Posted: 9/11/2006 10:43 PM
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Mitjitsu
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Joined: 4/24/2006
Posts: 2997
TAS of 2007 N64 TAS of 2007
The gens link is broken
Posted: 9/11/2006 10:49 PM
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Highness
Player (71)
Joined: 8/24/2004
Posts: 2562
Location: Sweden
Sorry for that. I have put all tas-related things in a subfolder called "tas" ;) Here's the proper URL: http://133an.sytes.net/~highness/tas/Gens_Editor_v1.rar
Posted: 9/11/2006 11:11 PM
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Mitjitsu
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Banned User
Joined: 4/24/2006
Posts: 2997
TAS of 2007 N64 TAS of 2007
Thanks, although every time I open a .GMV file it just keeps saying "not a GENS movie file" despite the fact it obvious its a .GMV file.
Posted: 9/14/2006 3:22 AM
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Highness
Player (71)
Joined: 8/24/2004
Posts: 2562
Location: Sweden
It has occured to me as well.
Posted: 9/14/2006 10:28 PM
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Mitjitsu
He/Him
Banned User
Joined: 4/24/2006
Posts: 2997
TAS of 2007 N64 TAS of 2007
How do I get round it then?