TPCBK | Back to Index page |
Prolog Control Block Contents TPCBK DSECT Storage Layout Cross Reference (Contains links to field and bit definitions) |
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TPCBK Prolog | Top of page |
NAME : HCPTPCBK DESCRIPTION: TAPE PATHING CONTROL BLOCK DSECT : TPCBK FUNCTION : CONTAINS TAPE PATHING INFORMATION LOCATED BY : VDEVDYPT IN VIRTUAL DEVICE BLOCK CREATED BY : HCPVDSAT (DURING ATTACH OR DEDICATE PROC) DELETED BY : HCPDTDEV (DURING DETACH COMMAND PROCESSING) SERIALIZED : BEING ACCESSED FOR A UNIQUE TASK RELOCATION CONSIDERATIONS : This control block is relocated as part of a live guest relocation (LGR). The bits and fields that need to be relocated are defined in the corresponding LGRTPCBK COPY file. Whenever changes are made to this control block, consideration must be given to any effects these changes will have on a relocation. If any new fields or bits are defined, they may need to be relocated. If existing bits or fields are changed, corresponding modifications may be required in the LGR version of this control block. Consider also the effects of these changes on a relocation involving a back-level release of CP. |
TPCBK Control Block Content | Top of page |
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TPCBK Storage Layout | Top of page |
*** TPCBK - TAPE PATHING CONTROL BLOCK * * +-------------------------------------------------------+ * 0 | | * = TPCBLOCK = * | | * +-------------------------------------------------------+ * 60 * *** TPCBK - TAPE PATHING CONTROL BLOCK *** Overlay for TPCBLOCK in TPCBK * * +-------------------------------------------------------+ * 0 | TPCGROUP | * | +------+---------------------------+ * 8 | |:FLAGS| C * +--------------------+------+ * *** Overlay for TPCBLOCK in TPCBK |
TPCBK Cross Reference | Top of page |
Symbol Dspl Value -------------- ---- ----- TPCBLOCK 0000 TPCENTRY 0000 TPCFGRP 000B 80 TPCFLAGS 000B TPCGROUP 0000 TPCNXTEN 000B 0000000C TPCSIZE 0000 0000000C |
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