Use the START command to start TSO once VTAM® is active. This command creates the terminal
control address space (TCAS), which accepts requests by terminal users
for logon to TSO.
S membername[.identifier][,devicetype|,[/]devnum]
[,volumeserial][([,MEMBER={name|nn}][,USERMAX=nnnnn]
[,GNAME=[name | NONE])]
[,keyword=option[,keyword=option]...]
The parameters are:
membername
The name of the member that contains the source JCL for the started
task. The member can be a cataloged procedure (for example, residing
in SYS1.PROCLIB) or a job that starts TSO/VTAM time-sharing. Many
installations use TCAS as the membername.
identifier
The user-determined name identifying this specific time-sharing
session. If you omit an identifier, the system automatically uses
the job name as the identifier.
devicetype
The device type of an output device where time-sharing parameters
from SYS1.PARMLIB are listed. This operand is useful only if the
PRINTOUT DD statement of the cataloged procedure invoked by the START
command specifies DDNAME=IEFRDER. If the PRINTOUT DD statement specifies
a SYSOUT device, the parameter values are listed on that device.
Note:devicetype and devnum are
mutually exclusive.
[/]devnum
The device number of an output device where time-sharing parameters
from SYS1.PARMLIB are listed. A device number is 3 or 4 hexadecimal
digits. A slash (/) must precede a 4-digit number and is optional
before a 3-digit number.
Note:devicetype and devnum are
mutually exclusive.
volumeserial
If devicetype is a tape or direct access device, the volume serial
number of the volume mounted on the device.
MEMBER=name
The name of the member in Parmlib that contains TSO/VTAM time-sharing
parameters.
MEMBER=nn
A two-digit decimal number that forms the suffix for specifying
the name of the member in Parmlib that contains TSO/VTAM time-sharing
parameters, where the name has the form TSOKEYnn.
USERMAX=nnnnn
The maximum number (0 to 32,767) of users that can be logged on
to TSO/VTAM time-sharing at any one time. If USERMAX is not specified
here or in the parmlib member that contains TSO/VTAM time-sharing
parameters, a value of 40 is used.
GNAME=name
The generic resource name for TSO/VTAM to use while operating
in a sysplex environment. You may specify this keyword only when
TSO/VTAM is operating within a sysplex.
GNAME=NONE
Specifies that TSO/VTAM will not use a generic resource name.
If you specify this value on the START command, the system will ignore
any GNAME value in the TSOKEY00 parmlib member.
keyword=option
Any appropriate keyword specified to override the corresponding
parameter in the cataloged procedure. The maximum length of each keyword=option
is 66 characters. No individual value within this field may be longer
than 44 characters in length. If you are overriding a symbolic parameter,
do not use any of the DD keywords. For example, do not use UNIT=
to override the device type positional parameter in the cataloged
procedure.
If more than one Parmlib name is specified, or if no name is specified,
the order of priorities that determines which time-sharing parameters
are used is:
The member name coded on the PARMLIB DD statement.
The MEMBER operand of the START command.
The keyword operand of the START command.
The default member TSOKEY00 if a member is not specified but a
Parmlib (that contains TSOKEY00) is.
The default values in the TCAS program if neither a member nor
a parmlib is specified.