++ USERMOD(TX67851)     /* REWORK(20220812) */             .
++ VER (X067)
   FMID(EBA1101)
   PRE  (UX12589)
 /*
   PROBLEM DESCRIPTION(S):
     TX67851 -
       VS1/Hercules integration.

       Generally speaking, this usermod causes VS1 to treat
       Hercules as though it was VM/370.  This permits VS1 to
       run in non-paging mode and use up to 16320K of real storage.

       One diagnose X'10' in IEAPGTS, used to release pages, is
       bypassed.  Hercules doesn't support diagnose X'10'.

       The mod determines if it is running under Hercules by
       checking the CPU version ID and the hypervisor name returned
       by diagnose X'00', store extended identification code.
       VM/370 returns X'FF' as the CPU version ID and "VM/370"
       as hypervisor identification.  This mod checks for CPU
       version ID of X'FD' and hypervisor identification code
       "HERCULES" to determine that it's running under Hercules.
       To disable VS1/Hercules integration, make sure that either
       the version ID or hypervisor ID returned by Hercules is
       changed.  For example, modify the Hercules configuration
       file either to set:

         CPUVERID FE

       or:

         LPARNAME name

       where "name" is anything other than "HERCULES".

   COMPONENT:  5741-SC1C8-EBA1101
               5741-SC1CN-EBA1101

   APARS FIXED: TX67851

   SPECIAL CONDITIONS:
     DOCUMENTATION:  Text of system message IEA788I modified.

       Publication:  OS/VS1 System Messages
       Form Number:  GC38-1001

       Message IEA788I is modified as follows:

         IEA788I NON-PAGING MODE OF VS1 UNDER { VM/370   }
                                              { HERCULES }

           Explanation:  OS/VS1 is running with the real storage
             size equal to the virtual storage size, as the result
             of running under the indicated hypervisor, either
             VM/370 or HERCULES.

           System Action:  Virtual storage is mapped one-to-one to
             the real storage.

           Operator Response:  None

   COMMENTS:
     LAST CHANGE:  2022/08/12

     REWORK HISTORY:
       2022/08/12: Fixed sequence numbers in CVT macro modification.
       2021/04/24: Created.

     THE FOLLOWING MODULES AND/OR MACROS ARE AFFECTED BY THIS USERMOD:

     MACROS
       CVT
       IEAANIP
       IEANIPDC
       IEAPGTS

     LISTEND
 */.
++ MACUPD   (IEAANIP ) DISTLIB(AMODGEN ).
++ MACUPD   (IEANIPDC) DISTLIB(AMODGEN ).
++ MACUPD   (CVT     ) DISTLIB(AMODGEN ).
++ MACUPD   (IEAPGTS ) DISTLIB(AMODGEN ).