BUILT BY: FUNCTION: DESCRIPTION: o
4
8 DMTCMX Request line port allocation
This ALERT element is passed via ALERT to the LAX and reserve line ports for links being activated
command.
Length (X'OF') Function I Response Code: X'Ol'l Code Line Address
linkid Onused Unllsed OPERATIONAL NOTES task (DMTLAX) to verify
in response to a START Certain fields are updated during processing. The meanings of the fields follow. ResFonse Codes! X'08' Specified line address not attached (CC=3) X'04' Specified line address not BSC port device type X'02' Line not available
Line Address: Request field specifying requested line address. Zero specification
implies request for allocation of a switchable line from the port table. If
successful, the port's line address is returned in this field as a resFonse.
linkid: Response field specifying the ID of the link that has reserved the particular
requested line address (with response code X'02'). 302 IBM VM/370 Data Areas and Control Block Logic

BUILT BY: DMTREX, DMTCMX, DMTAXS, DMTNPT, FUNCTION: Issue an RSCS message rESCRIPTION: This request element is passed via to the REX task, to specify
the construction and distribution of an RSCS message (ty DMTMGX). o
4
C
14
Length
(n-1)
Function
Code: X'02' Receiver Routing
Code
, ___ .: ;:I Receiver userid
Issuing Module Code
18 Binary Message Number Unused 1C OPERATIONAL NOTES 8-byte Variable Sutstitution Values for Message Text Severity Code
Action
Code
The routing code and severity code from the message definition (in DMTMSG) are used when not supplied in the message request element. If the message is not defined in it is constructed using the specifications in the message request element, and the "variable
substitution values" become the message text, unmodified.
Routing codes: X'80' Local RSCS console X'40' Remote addressee X'20' Local user X'10' Local VM/370 operator No response text is returned.
Appendix C. RSCS Request Elements 303