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It does this by re-implementing the Windows API to run directly on the Unix-based OS/processor platform. Wine does not virtualize the Windows OS/processor behavior but rather runs the Windows application at the same level of abstraction as the Windows OS. The disadvantage is that WINE can only be windows you cannot use it with some other OS as you could a normal VM.Įmulators virtualize the processor and/or OS which normally runs a Windows application by creating the logic and behavior of the OS/processor platform in the emulator application which itself runs on top of another OS/processor platform. Their claim that it is actually more efficient than an emulator makes sense - the overhead for just translating system calls is probably lower than that of running a VM. X86-64 emulator with a real copy of windows inside it, but that is not what WINE is. WINE is different from this in that it is not actually windows.
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Commonly an "emulator" includes the operating system, but that's not really what it is emulating the OS it includes is the same as one that would run on a real machine.Įmulators are sometimes used to simulate hardware different from the host machine, but also hardware that is exactly the same for the purpose of running one OS inside another. You can then in theory run any operating system targeting that style of machine. An emulator does this abstractly via a more circuitous route it does not translate system calls directly.Ī true emulator creates a virtual machine (e.g. No, or at least not in the sense that WINE does - by literally translating system calls one to one in user space. Well, how emulators and virtual machines simulate internal Windows logic on host non-Windows systems? Isn't that by translating Windows system calls into the host's own respective calls? Well, how emulators and virtual machines simulate internal Windows logic on host non-Windows systems? Isn't that by translating Windows system calls into the host's own respective calls? Is the difference between emulators and non-emulators (like Wine) is that emulators emulate a whole operating system then the application uses that system APIs without knowing that it is talking to an emulator, while non-emulators directly translates application's calls into the host's (and the application also may not know it)? Is the extra level of indirection is the only different between emulators and Wine? Methods and allowing you to cleanly integrate Windows applications On-the-fly, eliminating the performance and memory penalties of other Instead of simulating internal Windows logic like a virtual machine orĮmulator, Wine translates Windows API calls into POSIX calls Wine project claims that Wine Is Not an Emulator, because: As I understand emulators (in a simple way), they do translate or substitute the function calls of a program using functions of system X into functions used by system Y in which the program is being run onto.