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Saving registers in an assembly routine

hweisberg
Beginner
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If I write an assembly routine that is to be called from a CVF Fortran routine, what registers must I not touch, or else save and restore?

It seems that EBX is one such register. Is this true? Are there any others? Does this depend on project settings? I am mainly interested in settings with "Enable Recursive Routines" unchecked.
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