starter Systems INVOKE THE GENERATE EXEC PROCEDURE When all the files are placed in the reader, invoke the GENERATE EXEC procedure by issuing the following command:
generate vm370 This procedure invokes the VM/370 directory program to build the
disk-resident VM/370 directory, then assembles the DMKRIO and DMKSYS files that you placed in the real card reader. GENERATE prompts you for
the filename of your directory file with the message
ENTER DIRECTORY FILENAME
Enter the name you specified in the directory deck.
After the directory program execution completes, the DMKRIO and DMKSYS files are assembled in preparation for building the new CP system
nucleus. G'P.NER.TF. +hen check!=; fnr and source files.. 9.'her.. new versions of the DMKFCB and.DMKSNT modules are provided, GENERATE
assembles the new modules and replaces the corresponding starter system
supplied modules with the new modules. If any errors occur while the VM/370 directory is being built, the directory program issues error
messages and the GENERATE EXEC procedure issues the following message: CORRECT THE DIRECTORY CARDS AND RELOAD THE CARD READER RESPOND WITH: GENERATE DIRECT
Correct the errors in the directory program control statements, and
reload the card reader with only the ID card, the :READ statement, and
the directory program control statements. Then respond with:
generate direct
If errors are detected while the DMKRIO, DMKSYS, DMKFCB, or DMKSNT files are assembling, GENERATE issues a similar message: CORRECT THE filename ASSEMBLE FILE AND RELOAD THE CARD READER RESPOND WITH: GENERATE filename
Correct the errors in the
with only the ID card, the
Then, issue the GENERATE
example:
generate dmksys
indicated file, and reload the card reader
:READ statement, and the appropriate file.
command with the appropriate option. For Step 17. Attached Processor Support and
Virtual= Real Machines Once the directory is built and the files are assembled, the GENERATE EXEC asks:
ARE YOU GENERATING AN AP SYSTEM?--(RESPOND YESINO) followed by: VIRTUAL=REAL OPTION REQUIRED (YES, NO) : Your responses to these questions will determine the CNTRL file and
loadlist EXEC necessary to correctly build your system.
246 IBM VM/370 Planning and System Generation Guide

Page of GC20-1801-10 As Updated April 1, 1981 by TNL GN25-0837 St arter Systems If you respond "yes" to this question, you are prompted to enter the
amount of storage you wish to reserve in the CP nucleus for a
virtual=real machine. (Part 1. "Planning for System Generation"
contains formulas to help you determine how much storage you need to
reserve. )
To generate a V=R system of size !M (megabytes), in the
format nnnnk. nnnnk must be a mUltiple of 1024K. For example, to
indicate 3M you should specify 3072K. The minimum size you can specify
is 32K. The maximum specifiable size is 15360K. A "yes" response displays the following messa ges: STORAGE SIZE OF VIRT=REAL (MINIMUM IS 32K): 100k 0100K STORAGE SIZE FOR VIRTUAL=REAI, IS THE ABOVE ENTRY CORRECT (YES, NO) :
ves
If you respond "no" to this message, the following message is displayed:
FILE 'DMKSLC TEXT A1' NOT FOUND You must have enough virtual storage available to generate the CP nucleus with a virtual=real area. If you do not have enough virtual
storage available, redefine stcrage for your virtual machine. Step 18. Load the CP Nucleus Once you respond to the virtual=real generation questions, the GENERATE EXEC procedure builds and writes the CP nucleus on tape. To do this,
GENERATE first issues the the VMFLOAD command to punch the loader and CP object modules to a virtual punch spool file. Then GENERATE transfers
this file to the virtual card reader file and writes the file on tape.
GENERATE issues the following messages during the processinq:
hh:mm:ss NO FILES PURGED SYSTEM LOAD DECK COMPLETE hh:mm:ss PUN FILE nnnn TO CPGEN COPY 01 NOHOLD IPLABLE NUCLEUS NOW ON TAPE **** If any errors are detected while the tape is being written, you
must recreate the CP nucleus. To do this, issue the command:
generate cp nucleus
The procedure restarts at Step 17 where
virtual=real option and support for
followinq message is issued:
you are asked if you want the
the Attached Processor. The
THE NUCLEUS LOAD MAP MUST BE SAVED ON DISK FOR IPCS. WHEN 'NUCLEUS LOADED ON XXXXXX' IS TYPED, ISSUE 'CLOSE PRT' AND IPL CMS AND READ IN THE LOAD MAP. IT WOULD BE EXPEDIENT TO LOAD IT ON AN AREA ACCESSIBLE TO THE IPCS VIRTUAL MACHINE. FOLLOWING THIS, THE NEW SYSTEM MAY BE IPL'ED. Part 3. Generating VM/370 (CP, CMS, RSCS, and IPCS) 247