🚀 go-pugleaf

In article <pvp.75...@vincent1.iastate.edu>, p...@iastate.edu () writes...
>games then ( my friend will, he knows how to handle reprogrammed interrupt
>controllers, he's pretty cool ).                                            

*laugh* no offense, but that sounds like something Beavis would say to 
Butthead... :-D                                                          

>Oleg Pestovsky                                                             
>p...@iastate.edu                                                             

alan                                                                    

In article <pvp.75...@vincent1.iastate.edu>,  <p...@iastate.edu> wrote:
>First I thought DOOM was really tough. When I saw '... professional protection
>mode ...' message I thought my time was over. I used to crack games a lot and
>I thought I could crack any game, it was just a matter of time. But I don't

[..bit about cracking DOOM deleted..]

>My point, guys, is you just reprogram interrupt controller before running DOOM
>to avoid such a confusion. That should be it. I'll never be able to crack your
>games then ( my friend will, he knows how to handle reprogrammed interrupt
>controllers, he's pretty cool ).
>
>Best wishes to ID, yours sincerely PVP.

I'm a bit confused. Granted, I don't know a lot about "cracking" games, but
I thought the idea of cracking a game means to defeat it's copy protection
so you can copy it and play it on another site. As far as I know, both the
Shareware and the Registered version of Doom are not copy-protected, unless
I was playing with a cracked version... Does "cracking" in this context mean
something different?

>Oleg Pestovsky
>p...@iastate.edu


-- 
Gene Lee
el...@descartes.UWaterloo.ca

In article <CJ85v...@undergrad.math.uwaterloo.ca> el...@undergrad.math.uwaterloo.ca (Salty Freckles) writes:
>In article <pvp.75...@vincent1.iastate.edu>,  <p...@iastate.edu> wrote:
>>First I thought DOOM was really tough. When I saw '... professional protection
>>mode ...' message I thought my time was over. I used to crack games a lot and
>>I thought I could crack any game, it was just a matter of time. But I don't
>[..bit about cracking DOOM deleted..]
>>My point, guys, is you just reprogram interrupt controller before running DOOM
>>to avoid such a confusion. That should be it. I'll never be able to crack your
>>games then ( my friend will, he knows how to handle reprogrammed interrupt
>>controllers, he's pretty cool ).
>>Best wishes to ID, yours sincerely PVP.
>>Oleg Pestovsky
>>p...@iastate.edu
>
>I'm a bit confused. Granted, I don't know a lot about "cracking" games, but
>I thought the idea of cracking a game means to defeat it's copy protection
>so you can copy it and play it on another site. As far as I know, both the
>Shareware and the Registered version of Doom are not copy-protected, unless
>I was playing with a cracked version... Does "cracking" in this context mean
>something different?
>Gene Lee
>el...@descartes.UWaterloo.ca

No, you're fine, Oleg is a tad confused.  What the "Profesional Protected 
Mode" he is refering to means is the enviroment (not quite the word I want...) 
that DOOM runs in.  It means that DOOM runs with the CPU in "protected mode" 
(don't ask me about all the details of what this means, I don't remember), not 
that the game is copy protected.  There is NO copy protection in the Shareware 
Version of DOOM (not having yet recieced my Reg. copy, I can make no claims 
about it).  (To think of the people we let into our colleges these days...)


+----------------------------------------------------------------------------+
| "The box...you opened it.  We came. It's a means to summon us - Cenobites. |
| Explorers in the further regions of experience.  Demons to some, angels to |
| others. ... No tears please. It's a waste of good suffering." - Pinhead    |
| rrw...@netcom.com                                                          |
+----------------------------------------------------------------------------+

In <2gkjqs$6...@usenet.INS.CWRU.Edu> ap...@cleveland.Freenet.Edu (Hank Leukart) writes:


>In a previous article, p...@iastate.edu () says:

>>First I thought DOOM was really tough. When I saw '... professional protection
>>mode ...' message I thought my time was over. I used to crack games a lot and
>>I thought I could crack any game, it was just a matter of time. But I don't
>>know about protected mode much so I assumed that was a beginning of a new age
>>- the age of games running in protected mode (maybe I'm wrong completely about
>>DOOM, I must admit I've never tried to find out about protected mode, it's
>>just beyond me). Last night I had nothing to do and I just decided to run DOOM
>>under my good old cracking utility I wrote a year ago. Just for fun. The key

>	I don't understand what you're talking about.  Neither the
>shareware nor the registered version ARE copy protected.  That's why
>they're so easy to crack!
>-- 
>     Soon to be released software:        |         Hank Leukart
>Apogee: R A P T O R : Call of the Shadows |  (ap...@cleveland.freenet.edu)
>Epic:   E P I C   B A S E B A L L         |   "Official" DOOM FAQ Writer  
>id:     D O O M : Hell on Earth           | Available by E-mail or FTP.UWP.EDU


I'm very sorry guys, but you must have misunderstood me. I will explain you,
guys, what I meant by cracking. 
A couple years ago I've been doing it a lot 'cause there was no way to get a
registered version of any commercial game in Russia. Games were usually coming
by illegal copying only God knows where from, and they often contained some
sort of copy protection such as '...enter the word from page X, line Y, number
Z of your manual ...'. I hope you know what I mean. So the task for a
'game-cracker' was just to try to find a list of these passwords or to get rid
of this disturbing part of the game. Sometimes this was such a fun because
some games were so tricky that I had to spend more than a week trying to
understand the algorithm of the game. And at the end there was a prize waiting
for you - half an hour of playing the game which was running so predictable.
Sometimes cracking meant understanding of a structure of SaveGame-file. That
was even more fun 'cause some games didn't know how to handle wrong values of
SG-file - pure fun. Sometimes cracking meant cheating such as immortal life,
maximum ammo at any times, more money and so on, and so on ...
In order to do it - to 'crack' the game - you usually had to trace that game.
As far as I understand that's nearly impossible with my 'cracking' utilities
if that 'mean,tricky,evil,nasty...' game is running in 'protected mode' of
computer. But in the case of DOOM I could do it. I must say that I didn't even
try to crack DOOM 'cause there was no need for it (iddqd,idbehold,idspispopd
...) . So I decided that DOOM was not running in PM. I might be mistaken. ( I
suspended that I was mistaken 'cause I found that DS of DOOM was always 170,
that's odd ) If so I would be glad to hear from someone who understands better 
than I do. I appreciate that. 

Sincerely yours,guys, PVP




-- 
Oleg Pestovsky
p...@iastate.edu

In article <pvp.75...@vincent2.iastate.edu>,  <p...@iastate.edu> wrote:
>As far as I understand that's nearly impossible with my 'cracking' utilities
>if that 'mean,tricky,evil,nasty...' game is running in 'protected mode' of
>computer. But in the case of DOOM I could do it. I must say that I didn't even
>try to crack DOOM 'cause there was no need for it (iddqd,idbehold,idspispopd
>...) . So I decided that DOOM was not running in PM. I might be mistaken. ( I
>suspended that I was mistaken 'cause I found that DS of DOOM was always 170,
>that's odd) If so I would be glad to hear from someone who understands better 
>than I do. I appreciate that. 

I think you're confusing the "Protected Mode" which DOOM runs under for a
tamper-protection module. This is not what "Protected Mode" means. It refers
to the way the program is run such that it cannot be interfered with by other
concurrently running programs, thus causing a General Protection Violation
(or something to that effect). Windows 3.1 also runs in Protected Mode as
opposed to Real Mode, which means it attempts to isolate concurrently
running programs so they don't interfere with each other. This is a gross
generalization, but it explains why you found DOOM so easy to "crack". There
was never anything to crack...

>Oleg Pestovsky
>p...@iastate.edu


-- 
Gene Lee
el...@descartes.UWaterloo.ca

Hi Salty

I must confess that either I don't understand anything about PM or you still
don't know what I mean. 
By PM I mean :
When you switch to PM from Real Mode all your segment registers don't work
anymore the way they did before. Now you have GS and LS (don't remember
exactly ) and special segments (one for each register) that show how memory is
arranged. Then you have segment register for interrupts (IS, perhaps) and
segment that show where your interrupt programs are. Besides all old interrupt
vectors such as 01,02,08,09 are now reserved for special events such as
different violations of memory and port access and many others. If you try to
get access to memory using,say DS, CPU calculates physical address in different
way than in Real Mode. Intel386 CPU has additional virtual mode for 8086.
I'm sure that most of what I just said is not correct 'cause I read a book
about PM almost a year ago and I've never tried to write anything for PM. But
considering all these facts you must admit that program , written for Real
Mode, would not work in PM, especially my program which allows to use standard
debuggers while game is running.
I'd like to repeat again that I didn't try to crack DOOM, I tried to trace it
and this seemed to be successful.
So if you have any comments I'll be happy to hear from you.

Sincerely yours, PVP

-- 
Oleg Pestovsky
p...@iastate.edu