My commercial version of Keil C51 does not have the "stdint.h" file. My C51 is version 7.01.

The list of the standard header files in my /inc folder include:

ABSACC.H
ASSERT.H
CTYPE.H
ERRNO.H
FLOAT.H
INTRINS.H
LIMITS.H
MATH.H
SETJMP.H
STDARG.H
STDDEF.H
STDIO.H
STDLIB.H
STRING.H

The above list matches the list of header files that Keil documents in their on-line C51 Users Manual - http://www.keil.com/support/m...ibrary.htm

..with the exception of the ERRNO.H. That is on my system from an earlier version.

All told - no STDINT.H

Michael Karas