MFJZS099

MFJZS099 issues an SVC 99 call.

Syntax:

call "MFJZS099" using s99rb caller-id returning retcode

Parameters:

s99rb See below SVC 99 request block mapped by IDAS99RB.CPY. You may use IDAS99TU.CPY to assist you in the construction of the Text Units (TUs).
caller-id See Below While using this parameter is recommended, it is not a requirement for COBOL programs compiled as INTs and GNTs. For non-COBOL programs, it is required and is used by the SVC 99 handler to interpret format of addresses and CHARSET of the character data. Binary data must always in z/OS (Big-Endian) format.
retcode pic 9(8) comp SVC 99 return code that would have been placed in the general purpose register 15. All other error and info codes are stored in SVC99RB.

Comments:

SVC99 uses the high-order bit of a TU (Text Unit) address to interpret it as the last TU address in the TU address array.

When the calling program is compiled with NOAMODE, the high order bit of a TU address will not be interpreted as an indication of the last address in the TU pointer array. In this case, you have two options:

  • Make sure the last TU address is indicated by a value of either x’80000000’ or x’00000080’. This will keep the source compatible with the host. If either of these could potentially be a legitimate address on the computer you are running on, then the following option is the only alternative.
  • Specify a last address value of your choice in the extension portion of the SVC99 Request Block (S99RB).

If the calling program is compiled with AMODE, no changes are required. It is recommended that you use a null address to signify the last address. For example, set TU last address to x’80000000’.

Example:

A program running with NOAMODE: 

copy idas99rb
        replacing ==()== by ==s99rb==.
    copy idas99tu
        replacing ==()== by ==s99tu==. 
    01 caller-id.
       03 caller-id-char               pic x(04) value 'S099'.
       03 caller-id-ptr                pointer.*> ptr to s99rb
       03 caller-id-bin                pic 9(8) comp value 1.
       03 caller-id-float              comp-1 value 1.
    01 .
       03 tu-ptr-list.
          05 tu-ptr-ddn                pointer.
          05 tu-ptr-dsn                pointer.
          05 etc                       pointer. 
          05	                       pic x(4) value s99rb-last-ptr-val-x4-val. 
           
     move low-values to s99rb
     move s99rb-len-mf-ext to s99rb-len
     move s99rb-last-ptr-val-x4-val to s99rb-last-ptr-val-x4
     set s99rb-s99tu-array-ptr to address tu-ptr-list
     set caller-id-ptr to address s99rb

     call 'MFJZS099' using  s99rb caller-id returning retcode
     if retcode = 0 
        *> SVC99 ok            
     else      
        *> SVC99 not ok – check for errors
     end-if

A program running with AMODE: 

copy idas99rb
        replacing ==()== by ==s99rb==.
    copy idas99tu
        replacing ==()== by ==s99tu==. 
    01 caller-id.
       03 caller-id-char               pic x(04) value 'S099'.
       03 caller-id-ptr                pointer.*> ptr to s99rb
       03 caller-id-bin                pic 9(8) comp value 1.
       03 caller-id-float              comp-1 value 1.
    01 .
       03 tu-ptr-list.
          05 tu-ptr-ddn                pointer.
          05 tu-ptr-dsn                pointer.
          05 etc                       pointer. 
          05	                       pic x(4) value x'80000000' 
           
     move low-values to s99rb
     move s99rb-len-mf-ext to s99rb-len
     move s99rb-last-ptr-val-x4-val to s99rb-last-ptr-val-x4
     set s99rb-s99tu-array-ptr to address tu-ptr-list
     set caller-id-ptr to address s99rb

     call 'MFJZS099' using  s99rb caller-id returning retcode
     if retcode = 0 
        *> SVC99 ok            
     else      
        *> SVC99 not ok – check for errors
     end-if
Parent topic: JCL API