Use the AFHOUTCM macro to start and to end the Unit Attribute Table definition. In addition, you can specify default values for information required by the runtime input/output routines of the Fortran component of Language Environment. This section shows the syntax of the operands used for starting the Unit Attribute Table definition.

The syntax of AFHOUTCM macro instruction is as follows:

AFHOUTAG   AFHOUTCM   [UNTABLE={ highunit| 99 } ]
[,DEVICE={ device-name | SYSDA } ]

UNTABLE=highunit

Specifies the largest unit number that can be used in any Fortran program in I/O statements other than the CLOSE and INQUIRE statements. highunit must be an integer between 8 and 2000, inclusive. If the UNTABLE parameter is omitted, the default value of highunit is 99.

DEVICE=device-name

Specifies where dynamically allocated data sets are placed if there is no overriding value given through an invocation of the FILEINF callable service. device-name can be a unit address, a group name, or a device type for a DASD device. A unit address is 3 or 4 hexadecimal digits consisting of the channel, control unit, and device number. A group name is any name that is defined during MVS™ system generation for a DASD device such as SYSDA or DISK. The device type is the IBM-supplied name such as 3380 or 3390.

If the DEVICE parameter is omitted, the default value is SYSDA.