Information Supplied on Exit

The contents of the registers on exit are:

R0: Irrelevant
R1: Same as on entry
R2-10: Irrelevant
R11: Same as on entry
R12: Same as on entry
R14: Return address
R15: Return code - must be 0

Use ARETURN RC=0 to return to the caller.

To use IATUX63, YUX63LNR must contain the length of the returned string. Bit YUX63FPI must be set to indicate that a string is being returned. During a connect call, set these symbols if you have rebuilt the string at a new address or changed the length, but do not set them if you have updated an existing string in place without changing the length.