Type to use to represent a byte in ANSI (C89/90) C?

Question

Is there a standards-complaint method to represent a byte in ANSI (C89/90) C? I know that, most often, a char happens to be a byte, but my understanding is that this is not

Answer 1

Before C99? Platform-dependent code.

But why do you care? Just use stdint.h.

In every implementation of C I have used (from old UNIX to embedded compilers written by hardware engineers to big-vendor compilers) char has always been 8-bit.