Module AFH5VUAT contains the Unit Attribute Table defaults and DCB information for each I/O unit of the VS FORTRAN compatibility library. You can accept the IBM-supplied defaults, shown in Figure 1, or you can supply your own defaults. To customize AFH5VUAT for your site, use the IBM-supplied job AFHWVUAT, and modify the VSF2UAT, VSF2UNIT, and VSF2DCB macro instructions in an SMP/E USERMOD. The following sections describe the syntax and operands of the macro instructions.