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Hex Dec Type/Val Lng Label (dup) Comments
---- ---- --------- ---- -------------- --------
0000 0 Structure RSSBK RECORDING SYSTEM SERVICE BLOCK
0000 0 Address 4 RSSNEXT Pointer to next RSSBK
0004 4 Signed 2 RSSUSCNT SYSTEM RECORD USE COUNT
0006 6 Signed 2 RSSVN00M (0) PLACE HOLDER (VERSION 00 INFO)
0006 6 Signed 2 * RESERVED
0008 8 Bitstring 1 * RESERVED
0009 9 Bitstring 1 RSSRID SYSTEM RECORD ID
00000001 RSSRACNT X'01' RSSRACNT Accounting record
00000002 RSSRIOER X'02' RSSRIOER EREP (LOGREC)
record
00000003 RSSRSYMP X'03' RSSRSYMP Sympton record
00000004 RSSRCNFG X'04' RSSRCNFG Configuration
record
000000FF RSSRTAB X'FF' RSSRTAB Recording table (if
set block mapped by the RTHBK not
the RSSBK, RSSRID must remain at
the same offset as RTHRID)
000A 10 Signed 2 RSSFRESZ RSSBK BLOCK SIZE IN DOUBLE WORDS
000C 12 Bitstring 1 RSSFLAG FLAGS DEFINED FOR RECORDING
SYSTEM SERVICES
1... .... RSSRINIT X'80' RSSRINIT RECORD INITIALIZED
TO RECORDING TABLE
.1.. .... RSSRINC X'40' RSSRINC RECORD INCOMPLETE
..1. .... RSSNOMON X'20' RSSNOMON Record not
monitored by Free Storage Limit
Detection function NOTES : The
following field is used to
indicate when the RSSBK format
has changed and what that change
was due to. Any code defined here
should be checked in HCPRECKP
when old format RSSBKs are read
from the checkpoint cylinders.
The old format RSSBKs should then
be updated appropriately to the
new format. Code should also be
added to HCPRIUCF and HCPRECRI to
set the code for any RSSBKs that
are being newly created AFTER the
format change. A new code should
only need to be defined here when
a change to the RSSBK causes it
to be incompatible with a
previous format (as in the case
of the RSSMSGN field being
expanded from a halfword to a
fullword). Due to compatibility,
the displacement of RSSVERS
should NEVER change. Previous
versions of this control block
had this field marked 'RESERVED'
and the field was known to be
zero. Therefore, previous
versions were version X'00'. In
addition, RSSFLAG should never be
moved. This field is used without
regard to the version of the
RSSBK.
000D 13 Bitstring 1 RSSVERS RSSBK VERSION INDICATOR
00000000 RSSVN00 X'00' RSSVN00 For version 00,
original format
00000001 RSSVN01 X'01' RSSVN01 For version 01, the
RSSMSGN field was expanded from a
halfword to fullword
000E 14 Signed 2 RSSDCNT LENGTH OF RSSDATA IN BYTES
0010 16 Signed 4 RSSMSGN SYSTEM RECORD MESSAGE NUMBER
0014 20 Signed 4 * RESERVED
0018 24 Character 1 RSSDATA (0) START OF VARIABLE LENGTH SYSTEM
RECORD DATA
00000018 RSSBLEN *-RSSBK RSSBK HEADER LENGTH IN
BYTES
00000003 RSSSIZE (*-RSSBK+7)/8 RSSBK ENTRY IN
DOUBLEWORDS
The following mapping shows what the fields changed for the
Version 01 RSSBK looked like in Version 00. The following
fields are used when updating Version 00 RSSBKs to Version
01.
0006 6 Signed 2 RSSV00MN RSSMSGN FIELD (Version 00 Format)
0010 16 Character 1 RSSV00DA (0) RSSDATA FIELD (Version 00 Format)
00000010 RSSV00HL *-RSSBK Length of a Version 00
Header
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