NAME       : HCPSBIOP
 DESCRIPTION: Synchronous Block I/O Parameter
 DSECT      : SBIOP
 FUNCTION   : Describe the parameters of a Diagnose 'A4' request
 LOCATED BY : The "X" register contains the logical address of
              the SBIOP in Guest storage at the time Diagnose 'A4'
              is issued.
 CREATED BY : The program issuing Diagnose 'A4'.
 DELETED BY : N/A
 RELOCATION CONSIDERATIONS : None
 COMMENTS   : None

 SBIOP DSECT
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Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      SBIOP          Synchronous Block I/O Parameter
0000    0 Signed       2 SBIRESET (0)   Dummy name at offset 0 for
                                        DATAMAP
0000    0 Signed       2 SBIDEVNO       The virtual device number of the
                                        DASD to be used.
0002    2 Bitstring    1 SBIKEY         The Storage Protection Key to use
                                        for I/O operations with this
                                        request.
0003    3 Bitstring    1 SBICODE        Type of Request.
          00000001       SBIWRITE       X'01' SBIWRITE Write data from
                                        storage to DASD.
          00000002       SBIREAD        X'02' SBIREAD Read data from DASD
                                        to storage.
          00000004       SBIFORMT       X'04' SBIFORMT Format SCSI DASD
0004    4 Signed       4 SBIBLKSZ       Size of physical records on DASD
                                        for this request.
0008    8 Signed       2 SBIFRMAT (0)   Dummy name use by format ORG
0008    8 Address      4 SBILSTAD       Address of list of block number /
                                        data address pairs for this
                                        request. See SBILIST, below.
000C   12 Signed       4 SBILSTCT       The number of pairs in list at
                                        SBILSTAD. Provided by the issuer
                                        of the diagnose.
          000001F4       SBILSTMX       500 Maximum number of blocks that
                                        may be processed in one READ or
                                        WRITE operation.
0010   16 Signed       4 SBIBLKCT       The number of blocks processed by
                                        CP.
0014   20 Bitstring    1 SBIDEVST       Device status byte, returned by
                                        CP.
0015   21 Bitstring    1 SBISCHST       The subchannel status byte,
                                        returned by CP
0016   22 Signed       2 SBIRESCT       The residual count, returned by
                                        CP.
0018   24 Bitstring    1 SBILPM         Path I/O will be issued down
0019   25 Bitstring    1 SBIRESV0 (3)   Reserved for future IBM use.
001C   28 Signed       2 SBIRESVD       Reserved for future IBM use.
001E   30 Signed       2 SBISNSCT       The amount of sense data present.
0020   32 Bitstring   24 SBIRESV1       Reserved for IBM future use
0038   56 Bitstring   32 SBISDATA       The sense data (only if unit
                                        check is on in SBIDEVST)
          00000058       SBIBYLEN       *-SBIOP Length (in bytes) of
                                        SBIOP
          0000000B       SBIDWSIZ       (SBIBYLEN+7)/8 Size of SBIOP in
                                        doublewords.
0008    8 Bitstring    3 *
000B   11 Bitstring    1 SBILSTA3       Right-most byte for alignment
                                        test
      The following ORG is for use by SBICODE = FORMAT.
0008    8 Dbl-Word     8 SBILBA         Logical block address to start
                                        the format on
0010   16 Dbl-Word     8 SBIFBLKS       Number of blocks to format (zero
                                        means format to end of device)
0018   24 Address      8 SBIFDATA       Pointer to a 512 byte block of
                                        data to use for formatting (zero
                                        means format with zeros)
0020   32 Dbl-Word     8 SBIDIDBK       Number of blocks which will be
                                        formatted when SBIFBLKS is zero
                                        (minidisk size)
0028   40 Signed       4 SBIFRETC       IBM service diagnostic rc
002C   44 Signed       4 SBIFREAC       IBM service diagnostic reason
0030   48 Signed       4 SBIFEID        IBM service diagnostic errid
0034   52 Bitstring   36 SBIFRSVD       Reserved for future IBM use
      The following ORG is to reset LOCTR to zero for DATAMAP.
      SBILIST is not a redefinition of any part of SBIOP, but
      the mapping of the data pointed to by SBILSTAD.


 SBILIST DSECT
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Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      SBILIST        Synchronous Block I/O Parameter
0000    0 Dbl-Word     8 SBILNTRY (0)   A list entry is two words long
0000    0 Signed       4 SBILBKNO       The block number of data on DASD
                                        ( zero - origin )
0004    4 Address      4 SBILBFAD       The absolute address of data in
                                        guest machine storage.
0008    8 Bitstring    8 SBILNEXT (0)   The next list entry starts
                                        here...

          
*** SBIOP - Synchronous Block I/O Parameter
*
*     +-------------+------+------+---------------------------+
*   0 |  SBIDEVNO   |SBIKEY|:CODE |         SBIBLKSZ          |
*     +-------------+------+------+---------------------------+
*   8 |         SBILSTAD          |         SBILSTCT          |
*     +---------------------------+------+------+-------------+
*  10 |         SBIBLKCT          |:DEVST|:SCHST|  SBIRESCT   |
*     +------+--------------------+------+------+-------------+
*  18 |SBILPM|     SBIRESV0       |  SBIRESVD   |  SBISNSCT   |
*     +------+--------------------+-------------+-------------+
*  20 |                                                       |
*     =                       SBIRESV1                        =
*     |                                                       |
*     +-------------------------------------------------------+
*  38 |                                                       |
*     =                       SBISDATA                        =
*     |                                                       |
*     +-------------------------------------------------------+
*  58
*
*** SBIOP - Synchronous Block I/O Parameter
          
*** Overlay for SBILSTAD in SBIOP
*
*     +--------------------+------+
*   8 |////////////////////|:LSTA3| C
*     +--------------------+------+
*
*** Overlay for SBILSTAD in SBIOP
          
*** Overlay for SBIFRMAT in SBIOP
*
*     +-------------------------------------------------------+
*   8 |                        SBILBA                         |
*     +-------------------------------------------------------+
*  10 |                       SBIFBLKS                        |
*     +-------------------------------------------------------+
*  18 |                       SBIFDATA                        |
*     +-------------------------------------------------------+
*  20 |                       SBIDIDBK                        |
*     +---------------------------+---------------------------+
*  28 |         SBIFRETC          |         SBIFREAC          |
*     +---------------------------+---------------------------+
*  30 |         SBIFEID           |                           |
*     +---------------------------+                           |
*  38 |                                                       |
*     =                       SBIFRSVD                        =
*     |                                                       |
*     +-------------------------------------------------------+
*  58
*
*** Overlay for SBIFRMAT in SBIOP
          
*** SBILIST - Synchronous Block I/O Parameter
*
*     +---------------------------+---------------------------+
*   0 |         SBILBKNO          |         SBILBFAD          |
*     +---------------------------+---------------------------+
*
*** SBILIST - Synchronous Block I/O Parameter

 
Symbol         Dspl Value
-------------- ---- -----
SBIBLKCT       0010
SBIBLKSZ       0004
SBIBYLEN       0038 00000058
SBICODE        0003
SBIDEVNO       0000
SBIDEVST       0014
SBIDIDBK       0020
SBIDWSIZ       0038 0000000B
SBIFBLKS       0010
SBIFDATA       0018
SBIFEID        0030
SBIFORMT       0003 00000004
SBIFREAC       002C
SBIFRETC       0028
SBIFRMAT       0008
SBIFRSVD       0034
SBIKEY         0002
SBILBA         0008
SBILBFAD       0004
SBILBKNO       0000
SBILNEXT       0008
SBILNTRY       0000
SBILPM         0018
SBILSTAD       0008
SBILSTA3       000B
SBILSTCT       000C
SBILSTMX       000C 000001F4
SBIREAD        0003 00000002
SBIRESCT       0016
SBIRESET       0000
SBIRESVD       001C
SBIRESV0       0019
SBIRESV1       0020
SBISCHST       0015
SBISDATA       0038
SBISNSCT       001E
SBIWRITE       0003 00000001