Cheat Engine Forum Index Cheat Engine
The Official Site of Cheat Engine
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 


Cheat Engine Forum Index
PostGo back to topic
Dark Byte
Site Admin
Reputation: 373
Joined: 09 May 2003
Posts: 22011
Location: The netherlands

PostPosted: Mon May 08, 2017 8:46 am    Post subject:

both 81 and 83 are a dword compare. One just uses less bytes

e.g compare if an 4 byte address is 1 can be done by
Code:

83 3A 01              - cmp dword ptr [rdx],01 { 1 }

now if the 4 byte value at [rdx] contains the value 00000001 then the result will be true, BUT if the value at [rdx] is 01000001 then the result will be false

as you see, it does compare the full dword and acts exactly the same , but takes less bytes then
Code:

81 3A 01000000        - cmp [rdx],00000001 { 1 }

_________________
Do not ask me about online cheats. I don't know any and wont help finding them.

Like my help? Join me on Patreon so i can keep helping
Back to top
View user's profile Send private message MSN Messenger
Post reviews:   Approve 1
Author Review
sbryzl
Review: Approve
Post reference:
ReviewPosted: Mon May 08, 2017 8:56 am


Back to top
View user's profile Send private message
Display:  
Cheat Engine Forum Index


Powered by phpBB © 2001, 2005 phpBB Group

CE Wiki   IRC (#CEF)   Twitter
Third party websites