Final register contents

Set up the following registers when returning control to VTAM®:

Register 1:

Address of the exit's parameter list with modified values

Registers 2–14:

Restored to entry contents

Register 15:

Return code

The following descriptions are general descriptions of return codes. For more specific information, see the function descriptions starting at Begin function (function code X'FE').

X'00'–X'4F' (0–79): Indicates exit output
X'50'–X'7F' (80–127): Reserved
Greater than X'7F' (127): Invocation failed; exit deleted and deactivated
X'F0'–X'FF' (240–255): Reserved

If the exit return code is greater than X'7F', VTAM ignores any options you specified and issues error message IST985I.