MDAS

Prolog  

Control Block Contents  
   MDAS DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  

MDAS Prolog

 Name       : HCPTCMBK
 Description: MDAS maps an area in the TCMBK with
              information for each address space used by
              MDC.
 DSECT      : MDAS
 Notes      : Serialized by TCMPTELK when adding new address spaces.

MDAS Control Block Content

MDAS DSECT

Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      MDAS           MDAS maps an area in the TCMBK
                                        with
0000    0 Signed       4 MDALET         ALET for address space
0004    4 Signed       4 MDASTO         Segment table origin
          00000008       MDASIZE        *-MDAS Size of address space
                                        fields
          00000003       MDASZSHF       3 Use this in a SRL instruction
                                        to "divide" by MDASIZE or SLL to
                                        "multiply"

MDAS Storage Layout

          
*** MDAS - MDAS maps an area in the TCMBK with
*
*     +---------------------------+---------------------------+
*   0 |          MDALET           |          MDASTO           |
*     +---------------------------+---------------------------+
*   8
*
*** MDAS - MDAS maps an area in the TCMBK with

MDAS Cross Reference

Symbol         Dspl Value
-------------- ---- -----
MDALET         0000
MDASIZE        0004 00000008
MDASTO         0004
MDASZSHF       0004 00000003