HYPMAP | Back to Index page |
Prolog Control Block Contents HYPMAP DSECT Storage Layout Cross Reference (Contains links to field and bit definitions) |
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HYPMAP Prolog | Top of page |
NAME : HYPMAP DESCRIPTION: Hyperblock Mapping Table DSECT : HYPMAP FUNCTION : HYPMAP is the hyperblock mapping table for read-only disks. It contains a header plus an entry for each 4K page of hyperblocks (or FSTs for a STAT) associated with the accessed disk. HYPMAP is used mainly by file management to reduce the paging overhead when searching for a file on a read-only disk. HYPMAP is called by the HYPMAP macro. |
HYPMAP Control Block Content | Top of page |
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HYPMAP Storage Layout | Top of page |
*** HYPMAP - Hyperblock Mapping Table * * +---------------------------+---------------------------+ * 0 | HYPMSIZE | HYPMENTS | * +-------------+-------------+---------------------------+ * 8 | HYPMBLKC |/////////////| HYPMAHYP | * +-------------+-------------+---------------------------+ * 10 | HYPMFN1 | HYPMFN2 | * +---------------------------+---------------------------+ * 18 | HYPMFT1 | HYPMFT2 | * +---------------------------+---------------------------+ * *** HYPMAP - Hyperblock Mapping Table |
HYPMAP Cross Reference | Top of page |
Symbol Dspl Value -------------- ---- ----- HYPMAHYP 000C HYPMBLKC 0008 HYPMENTS 0004 HYPMFID 0010 HYPMFN 0010 HYPMFN1 0010 HYPMFN2 0014 HYPMFT 0018 HYPMFT1 0018 HYPMFT2 001C HYPMHSIZ 0004 00000001 HYPMLEN 0020 00000018 HYPMNEXT 0020 HYPMSIZE 0000 HYPTAB 0008 |
Last updated on 22 May 2013 at 13:49:57 EDT.
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