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Doofus - IO.SYS Logo address?
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Original Message
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Name: W0rm
Date: August 11, 2001 at 22:14:54 Pacific
Subject: Doofus - IO.SYS Logo address?
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Comment: I'm going to see if I can get some damn good ASM programmers to take a look at IO.SYS and see if they can pluck that b---tard built in logo out of it...but I could use the addresses :) --- do you have them any longer? - W0rm
- http://jason-n3xt.org/dos
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Response Number 1
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Name: The Doofus
Date: August 12, 2001 at 07:23:45 Pacific
Subject: Doofus - IO.SYS Logo address?
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Reply: (edit)Sorry about that, I didn't see your original request in the other post. I took a look through my archives and the work folder no longer exists. It was just too long ago to remember the addresses either. No d*mn help am I. :-( I do remember where I got the link to the decompiler I used and a good tutorial:
Decompilation of Binary Programs - dcc
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Response Number 2
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Name: The Doofus
Date: August 12, 2001 at 07:41:01 Pacific
Subject: Doofus - IO.SYS Logo address?
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Reply: (edit)I should mention that the publications at the bottom of the page at the site I linked to above are freely downloadable, though you may need Ghostscript 7.00 and GSview 4.0 to view the PostScript documents.
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Response Number 3
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Name: xb
Date: August 12, 2001 at 10:03:37 Pacific
Subject: Doofus - IO.SYS Logo address?
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Reply: (edit)
what *logo* are you talking about? for what version of dos?
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Response Number 4
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Name: W0rm
Date: August 12, 2001 at 12:04:49 Pacific
Subject: Doofus - IO.SYS Logo address?
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Reply: (edit)DOS Version 7.10 in particular - Win98SE's DOS - the logo I'm referring to is the splash screen...if you want to see what it looks like take a look at LOGO.SYS - you know, the logo you see when booting your system :)
- W0rm
- http://jason-n3xt.org/dos
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Response Number 5
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Name: The Doofus
Date: August 12, 2001 at 12:36:40 Pacific
Subject: Doofus - IO.SYS Logo address?
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Reply: (edit)If you ever do suse it out, I'll be first in line for a copy. It really is that little bit of space (okay, huge amount of space) that would make a 7.10 boot disk truly useful. I wish you luck.
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Response Number 6
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Name: W0rm
Date: August 12, 2001 at 12:57:48 Pacific
Subject: Doofus - IO.SYS Logo address?
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Reply: (edit)can you give me any clues at all, hehe :) --- is it like 100k - or is it compressed a lot smaller?
- W0rm
- http://jason-n3xt.org/dos
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Response Number 7
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Name: W0rm
Date: August 12, 2001 at 14:11:25 Pacific
Subject: Doofus - IO.SYS Logo address?
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Reply: (edit)no luck...DCC produces a 672 byte IO.B file...and if that *is* the source to the DOS kernel, then they must've made it awefully bloated :)
- W0rm
- http://jason-n3xt.org/dos
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Response Number 8
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Name: The Doofus
Date: August 12, 2001 at 14:19:10 Pacific
Subject: Doofus - IO.SYS Logo address?
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Reply: (edit)If I recall correctly, the logo is 47 or 49 KB. When you decompile the file it is exploded into ascii text and when you compile it it is compressed into hex code. That's why it's so big. Also, that's why you get the:
!L=unpacked file is corrupted
error when the byte length isn't right when you compile it.
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Response Number 9
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Name: W0rm
Date: August 12, 2001 at 15:04:41 Pacific
Subject: Doofus - IO.SYS Logo address?
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Reply: (edit)Uhm, well I kind of got pissed off...so try simply chopping off the end of IO.SYS so the file size is 123000 - it should still boot...note that the LOGO is right in that area...the decompiler didn't help for me... Anyway, now that I know whereabouts it is, I'm going to have someone professionally remove it :) - though I'm sure I could survive by just clipping the end off like that.
- W0rm
- http://jason-n3xt.org/dos
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Response Number 10
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Name: W0rm
Date: August 12, 2001 at 20:00:55 Pacific
Subject: Doofus - IO.SYS Logo address?
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Reply: (edit)shoot...only booted properly in bochs...It'll probably have to be a bit bigger, likely, we'll see :)
- W0rm
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Response Number 12
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Name: Michail
Date: October 17, 2001 at 11:46:31 Pacific
Subject: Doofus - IO.SYS Logo address?
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Reply: (edit)In win98Se io.sys hyphen what two four digit numbers in hex: shell I see?(I am looking for second number as variable)And what I shood type in s 0000 ffff "Starting" wich in win95! Then what is going be in win98SE?
Thanks.Vystavkine Michail
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