Page of GC20-1801-10 As Updated April 1, 1981 by TNL GN25-0837 Updating Service Programs
Updating Service Programs
Service programs are CP modules that are not a part
They may execute either standalone from a card reader
card reader or your virtual card reader) or in some
command. The service programs are:
of the CP nucleus.
(the real system
cases, as a • DASD Dump/Restore (module • Directory program (module DMKDIR) • Format/Allocate program (module DMKFMT) • IBCDASDI, the virtual disk initialization program (module 1BCDASD1) • NCPDUMP, the 3704/3705 dump program (module DMKRND) If you apply a PTF to a service program, you may use the GENERATE EXEC to create a new 1PLable copy of the service program that can be
loaded via IPL or the CMSGEND EXEC to create a new CMS command module,
or both.
For example, the Directory program exists as the CP module DMKDIR.
To apply PTFs to the source file, you would use the VMFASK EXEC procedure, as follows:
vmfasm dmkdir DMKRnO where DMKRnO is the filename of the control file (the filetype is
CNT BL) • The Directory program can be used in three ways: (1) as a standalone
program that you IPL from the real system card reader (2) as a standalone program that you can 1PL from virtual card reader, and (3) as
a CMS command, DIRECT.
To create a new standalone copy for loading by IPL, you can use the
GENERATE EXEC: generate ipldeck
you are prompted to enter the name of the program with the message
ENTER THOSE DECKS TO BE GENERATED ( DDR , DIR I FMT I ALL )
you enter:
dir
Then the GENERATE EXEC prompts you to enter the target disk address
(where the deck will reside) :
ENTER TARGET DISK ADDRESS. If you want the program on the system disk, you respond 190 You must have this disk accessed as your read/write A-disk.
GENERATE EXEC is finished, it issues the message
'IPL DIR A1' CREATED When the Part 5. Updating VM/370 369

Updating Service Programs Next, to generate the CMS DIRECT command, use the C!SGEND EXEC procedure:
cmsgend direct
If you want to punch a real card deck, to keep available for
standalone operations in the machine room, you can punch the file IPL DIR A 1 (wit h the NOHEADER option), or use the GENERATE EXEC with the SRVCPGM operand:
generate srvcpgm
While you issue the above command, all of the standalone service
programs are punched onto cards.
Fiqure qO lists the services programs and indicates the programs and
procedures you can use for each. r- Program I DASD I I iDump/ I IFormatl I I Update ,Restore fDirectorYIAllocatet IBCDASDI INCPDUMP CP module I name (use DMKDDR DMKD1R DMKFMT IBCDASDI I Dl'1KRND VMFASM to I update) I CMS command I name (use I CMSGEND to DDR DIRECT I NCPDUl'1P Generate I CMS dis k file I I I (use GENERATEI I I IPLDECK to I 1PL DDRi 1PL DIR IIPL FMT crea tel I I I Standalone I card deck I j I 1PL (use GENERATEI 1PT.. DDF! 1PL DIR IIPL FMT IBCDASDI SRVCPGM to I ! I pun ch) ! I Figure 40. Updating Service Programs 370 IBM VM/370 Planning and System Generation Guide