130 IB" V"/370 Planning and System Generation Guide

Introduction Before starting the system generation procedures on a real machine, you
must create three files that describe the system you are
generating. There are two additional files, which are optional. You can
use card input, or create these files using the Editor. If you are
modifying an existing V!/370 system, you can use the Editor to alter
the existing files.
The three files that you must prepare are: • The real I/O configuration file (module name DKKRIO), which defines
the I/O configuration on the real System/370 machine. • The CP system control file (module name DKKSYS), which defines
CP-controlled DASD volumes, allocation, and so on. • The VK/370 directory file (normally a file named USER DIRECT),
which contains the VK/370 directory entries that define the virtual
machine configuration for each userG In addition, you should prepare the system name table (DKKSNT) file
if you plan to save systems. If you generate the 3704/3705 control
program, you must save it; otherwise, the 3704/3705 control program
cannot be loaded by VK/370. "Part 1. Planning for System Generation" has
a section that describes the requirements for saving systems. You can also change the forms control buffer load (module name • The notational conVentions that describe the macro syntax for VK/370 system generation are listed in "Appendix D: Notational Conventions."
These notational conventions are the same as the conventions used to
describe VK/370 commands. Part 2. Defining Your VK/370 System 131