Programming Interface Information:
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ASA64
Control Block Contents
ASA64 DSECT
Cross Reference (Contains links to field and bit definitions)
ASA64 Control Block Content
ASA64 DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure ASA64 AUXILIARY STORAGE ADDRESS TABLE ENTRY 0000 0 Dbl-Word 8 ASAGENTR (0) Auxiliary Storage Address 0000 0 Signed 4 ASAGW0 Word 0 of ASA64 0004 4 Signed 4 ASAGW1 Word 1 of ASA64 00000008 ASAGLENT *-ASAGENTR Length of one address table entry 0008 8 Dbl-Word 8 ASAGNEXT (0) Next address table entry 0000 0 Signed 2 ASAGCNUM Auxiliary storage cylinder number 0002 2 Bitstring 1 ASAGPNUM Auxiliary storage page number 0003 3 Bitstring 1 ASAGVOL Auxiliary storage volume code 0004 4 Signed 4 ASAGPTRM Used by PTRM. See VPGGPTRM. 0004 4 Signed 2 * Reserved 0006 6 Signed 2 ASAOVFLW Count of the number of 128 pin- count overflow increments. Each increment of ASAOVFLW represents 128 pins. The pin count for a page is kept in PGSPINCT, which is only 1 byte in length and can hold up to 127 pin increments. If that overflows, ASAOVFLW is incremented and therefore represents 128 pins. Note that ASAOVFLW can be changed with PCLONLY page serialization by those tasks that are allowed to use PCLONLY.
ASA64 Storage Layout
*** ASA64 - AUXILIARY STORAGE ADDRESS TABLE ENTRY * * +---------------------------+---------------------------+ * 0 | ASAGW0 | ASAGW1 | * +---------------------------+---------------------------+ * *** ASA64 - AUXILIARY STORAGE ADDRESS TABLE ENTRY *** Overlay for ASAGW0 in ASA64 * * +-------------+------+------+ * 0 | ASAGCNUM |:GPNUM|:GVOL | 4 * +-------------+------+------+ * *** Overlay for ASAGW0 in ASA64 *** Overlay for ASAGW1 in ASA64 * * +---------------------------+ * 0 ... 4 | ASAGPTRM | * +---------------------------+ * 8 * *** Overlay for ASAGW1 in ASA64 *** Overlay for ASAGW1 in ASA64 * * +-------------+-------------+ * 0 ... 4 |/////////////| ASAOVFLW | * +-------------+-------------+ * 8 * *** Overlay for ASAGW1 in ASA64
ASA64 Cross Reference
Symbol Dspl Value -------------- ---- ----- ASAGCNUM 0000 ASAGENTR 0000 ASAGLENT 0004 00000008 ASAGNEXT 0008 ASAGPNUM 0002 ASAGPTRM 0004 ASAGVOL 0003 ASAGW0 0000 ASAGW1 0004 ASAOVFLW 0006
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