UFOHDR DSECT
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Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      UFOHDR         VIRTUAL MACHINE DEFINITION BLOCK
0000    0 Address      8 VMDFR1STG      1st user owned list frame entry
                                        (Initialized as pointing to
                                        itself)
0008    8 Address      8 VMDFRLSTG      Last user owned list frame entry
                                        (Initially points to VMDFR1STG)
0010   16 Address      8 VMDUFEACT      UFO list last FRMTE on the act
                                        list (Initially points to
                                        VMDFR1STG)
0018   24 Signed       4 VMDIBTGHW      VMDUFIBTG field's high water mark
001C   28 Signed       4 VMDIBTGLW      VMDUFIBTG field's low water mark
0020   32 Signed       4 VMDUFACTC      UFO list count of FRMTEs in the
                                        active section. The associated
                                        pages are valid.
0024   36 Signed       4 VMDUFIBTG      Target size of UFO IBR section
0028   40 Signed       4 VMDUFIBRC      UFO list count of FRMTEs in the
                                        IBR section. It is likely the
                                        associated pages are in the IBR
                                        state, however, revalidation of
                                        an IBR page may not move the
                                        FRMTE to the active section in
                                        order to minimize path length of
                                        the revalidation process or
                                        because serialization could not
                                        be obtained.
002C   44 Signed       4 VMDUIBRVC      UFO IBR revalidation count since
                                        last cyclic list visit
0030   48 Signed       4 VMDUIBRVH      UFO IBR revalidation historical
                                        rate
0034   52 Signed       4 VMDUIBIVC      UFO IBR invalidation count since
                                        last cyclic list visit
0038   56 Signed       4 VMDUIBIVH      UFO IBR invalidation historical
                                        rate
          00000008       UFOHDRDW       (*-UFOHDR+7)/8 Size in
                                        doublewords

          
*** UFOHDR - VIRTUAL MACHINE DEFINITION BLOCK
*
*     +-------------------------------------------------------+
*   0 |                      VMDFR1STG                        |
*     +-------------------------------------------------------+
*   8 |                      VMDFRLSTG                        |
*     +-------------------------------------------------------+
*  10 |                      VMDUFEACT                        |
*     +---------------------------+---------------------------+
*  18 |        VMDIBTGHW          |        VMDIBTGLW          |
*     +---------------------------+---------------------------+
*  20 |        VMDUFACTC          |        VMDUFIBTG          |
*     +---------------------------+---------------------------+
*  28 |        VMDUFIBRC          |        VMDUIBRVC          |
*     +---------------------------+---------------------------+
*  30 |        VMDUIBRVH          |        VMDUIBIVC          |
*     +---------------------------+---------------------------+
*  38 |        VMDUIBIVH          | 3C
*     +---------------------------+
*
*** UFOHDR - VIRTUAL MACHINE DEFINITION BLOCK

 
Symbol         Dspl Value
-------------- ---- -----
UFOHDRDW       0038 00000008
VMDFRLSTG      0008
VMDFR1STG      0000
VMDIBTGHW      0018
VMDIBTGLW      001C
VMDUFACTC      0020
VMDUFEACT      0010
VMDUFIBRC      0028
VMDUFIBTG      0024
VMDUIBIVC      0034
VMDUIBIVH      0038
VMDUIBRVC      002C
VMDUIBRVH      0030