The evaluation version has the following limitations
* it only supports the 80x86 & ARM family : IDA Pro support a large number of other processors.
* it will only load 80x86 & ARM PE files. The full version of IDA Pro will accept virtually any file, from Atmel ROMs to OS/2 LX executables. See our disassembly gallery for information about the additional processors, operating systems and file formats we support.
* only the Windows GUI version is included in the archive. IDA Pro runs natively as a Windows GUI or console application and as a Linux Console.
* the only compiler signatures included are the ones that can be used to produce Windows 32 PE files; the only type information included is for Visual C++ 6 and Borland C++ Builder.
* this demo contains a demo version of the ARM/Windows CE debugger.
Please see our ARM/Windows CE debugging tutorial
* this demo contains a demo version of the Bochs debugger.
Check the debugger tutorial NEW!
* you will not be able to save your work, it will time out after some use, it will not disassemble itself.
http://www.hex-rays.com/idapro/idadowndemo.htm