or AS Apr1L lYijl by TNL GN25-0837
Loading and Saving Discontiguous Saved Segments Before you invoke DOSGEN to load the INSTVSAM segment, IPL CMS in a
virtual machine with 16M (16384K) of storage. The INSTVSAM segment will
be loaded near the top of storage, at 16256K (hexadecimal address FEOOOO). You can increase your virtual machine storage size, up to the maximum size defined for it in the VM/370 directory, by entering the DEFINE STORAGE command. After the DEFINE STORAGE command executes, you must
reload CMS. define storage 16m
ipl 190 At this point, you save the segment called INSTVSAM by
issuing the commands:
dosgen feOOOO instvsam
Be sure the DOSGEN EXEC is formatted on a CMS minidisk in either 800 or
lK blocks. The format of the DOSGEN command is: DOSGEN address [segmentnamel
address is the virtual storage location where the CMS/DOS segment
is to be loaded. This address is specified in
hexadecimal digits.
segmentname is the name of the segment to be loaded.
previously assigned a name to the CMS/DOS the NAHESYS macro. You must ha ve
segment with DOSGEN checks that the address
than X'20000', and less than 16M. contains valid characters, is greater
If an error is detected, the message DMSGEN095E INVALID ADDRESS 'address'
is issued and the command is terminated. DOSGEN then checks for a read/write A-disk on which to write the C!S loader work file; if none is accessed, it issues an error message and
the command terminates. DMSGEN006E NO READ/WRITE A-DISK ACCESSED Next, DOSGEN loads all the text files needed for DOS simulation. The
text files are loaded starting at the address specified on the DOSGEN command. If there are any unresolved external references, OOSGEN terminates with the message DMSGENlllE DOSGEN FAILED DUE TO LOAD ERRORS DOSGEN then assigns a storage key of X'D' to the segment
it. If an error is detected, one of the following messages
and DOSGEN terminates: DMSGEN412S DOSGEN FAILED DUE TO SETKEY ERRORS DHSGEN141S DOSGEN FAILED DUE TO SAVESYS ERRORS 270 IBM VM/370 Planning and System Generation Guide
and saves
is issued

Page of GC20-1801-10 As Updated April 1, 1981 by TNL GN2S-0831 Loading and Saving Discontiguous Saved Segments
Otherwise, the segment is successfully saved, the load map is printed,
and the completion message:
DMSGEN715r DOSGEN COMPLETE is issued. No!e: In the DOSGEN EXEC procedure, the default settinq for is TEXT. with this default, error messages are displayed with the message
text only, unless the type code of the message is S or T. To have all
messages displayed with both text and identifier, issue the command:
set emsg on
at the beginning of the procedure.
Part 3. Generating VM/370 (CP, CMS, RSCS, and IPCS) 210.1