When VTAM® passes control to the command verification exit routine, register contents are as follows:

Register 0:

Entry code

X'04'

Exit invocation

X'10'

Exit activation

X'18'

Exit replacement

X'20'

Exit deactivation

Register 1:

Address of the command verification exit parameter list described in Table 1 or in Table 2

Register 13:

Address of a standard 72-byte save area

Register 14:

Return address

Register 15:

Address of the command verification exit's entry point