Page of GC20-1S07-7 As Updated April 1, 19S1 by TNL GN25-0829 SUBCODE X'0004' Rx virtual address of a 13-doubleword buffer
Ry virtual spool reader address
If the specified device is in use via diagnose; the VSPLCTL block is
checked to see whether or not this is a repeated call for printer SFBLOKs. If it is, then the chain search continues from the point where
the last SFBLOK was given to the virtual machine. In this case, cc = 1
is set when there are no more print files. If this is the first call for
an SFBLOK, or if there have been intervening calls for file reading, the
spool input chain is searched from the beginning, and cc=2 is set if no
files are found. !Qte: The virtual buffer specified via Rx must not cross a page boundary
or a specification exception will result. SUBCODE X'OOOS' Rx virtual address of a 13-doubleword buffer
Ry virtual spool reader address Processing for subcode X'OOOS' is the same as for subcode X'0004', except that only card-image input files are processed. MQte: For both subcode X'0004' and subcode X'0008', the format
definition for a SFBLOK can be found in the system macro library. SUBCODE X'OOOC' Fx file identifier of requested file
Ry virtual spool reader address
The spool input chain is searched for the file specified. If it is
not found, cc=2 is set. If it is found, the file is moved to the head
of the chain so that it will be the next file processed by any of the
other fanctions. SUBCODE X'0010' Rx new copy count for the active file
Ry virtual spool reader address
The specified device is checked for an active file. If no file is
active, cc=2 is set. Otherwise, the copy COUNT for the file is set to
the specified value, with a maximum of 255. If the specified count is
not positive, a specification exception is generated. If the count is
greater than 255, it is adjusted to module 256.
188 IBM VM/370 System Programmer's Guide

Page of GC20-1807-7 As Updated April 1, 1981 by TNL GN25-0829 SUBCODE X'0014' Rx start address of virtual fullpage buffer
Ry = virtual spool reader address
The specified device is checked for an active file. If no active file
is found, cc=2 is set. otherwise, the VSPLCTL pointers are reset to the
beqinning of the file. SUBCODE X'0018' Rx start address of virtual fullpage buffer Ry virtual spool reader address
The specified device is checked for an active file. If no active file
is found, cc=2 is set. Otherwise, the file is backspaced one record and
the. record is given to the user as in subcode X'OOOO'. If the file is
already positioned at the first record, the first record is given to the
user. SUBCODE x'001C' Rx = virtual address of a 13-doubleword buffer
Ry = virtual spool reader address
Processing is the same as Subcode X'0008', except
spool files, as identified by the flag is
handled. SUBCODE x'0020' Rx = start address of fullpage virtual buffer
Ry virtual spool reader address
Processing is the same as Subcode X'OOOO', except
spool files, as identified by the SFBMON flag in
handled.
that only monitor
SFBFLAG2, can be
that only monitor SFBFLAG2, can be
Part 2. Control Program (CP) 189