int RegAXUsed (struct CodeSeg* S, unsigned Index);
/* Check if the value in A or(!) the value in X are used. */
+int RegEAXUsed (struct CodeSeg* S, unsigned Index);
+/* Check if any of the four bytes in EAX are used. */
+
unsigned GetKnownReg (unsigned Use, const struct RegContents* RC);
/* Return the register or zero page location from the set in Use, thats
* contents are known. If Use does not contain any register, or if the