Register contents when Exit 18 gets control

The contents of the registers on entry to this exit are:

Register

Contents

0

A logon or logoff indication having the following meanings:

0: indicates syntax processing for a normal logon
4: indicates logon processing for a normal logon after logon parameters have been processed
8: indicates logoff processing
12: indicates autologon processing

1

Address of a 5-word parameter list having the following structure:

Word 1 (+0)

address of the remote attribute table (RAT) when R0 indicates a normal logon process of “0”

address of a RAT entry when R0 indicates other than a normal logon process (that is, R0 contains a value of 4, 8, or 12).

Word 2 (+4)

0 during syntax processing (that is, R0=0)
address of the line DCT after logon is complete (that is, R0≠0)

Word 3 (+8)

address of the ICE

Word 4 (+12)

address of the bind user data when R0 indicates normal logon processing (that is, R0=0). The format of the bind user data is determined by installation VTAM® application programs that define the bind user data.

Word 5 (+16)

length of the bind user data when R0 indicates normal logon processing (that is, R0=0).

2-10

N/A

11

Address of the HCT

12

N/A

13

Address of the line manager PCE

14

Return address

15

Entry address