Can Solaris x86 run old applications that were compiled for Solaris Sparc?

Is the x86 edition able to run old apps? Does it take care of all endianness stuff?

Please don't send me to Google :) I honestly tried and was not able to find a solid answer with some references.

No, you can't. You must use an emulator like QuickTransit or qemu to do that

You can find more information on Google with the appropriate keywords:

• Running Solaris Sparc Apps on X86 Solaris
• Runing Solaris SPARC software on x86-64
• Transitive Translates SPARC Solaris Apps on Windows
• Solaris SPARC to x86 software highway opens
• Sparc: "emulate" it on x86 (windows, linux) & run solaris 10. Anyone done it?
• Export an application using Sparc architecture to intel x86

If you have the source code it'll be easier and far more performant to do a recompile to the target platform. You can read

• Solaris SPARC to Solaris x86 Porting Guide
• Just one source code can be used on Solaris 11 sparc and x86?