Manage transmission of spool file data via a GIVE/TAKE request to the AXS task Provide GIVE/TAKE requests to the REX task co.mand module (DftTC!X) The precise functional requirements vary froa line driver to line
driver, depending on the type of reaote station the line driver
Each line driver is responsible for maintenance of its _ link status
and line activity (TRACE) records in the RSCS system status tables. TWO line drivers are provided, one to support remote 2770, 2780, 3770 (in 2770 mode), and 3780 terminals, and another to interface to remote BASP- and ASP-type systems or work stations.
The SML Line Driver Program
The SML line driver program is composed of four general types cf
routines: Processors, which are routines that execute the functions required by
the HOST and RJE Frocessing modes. An input/output routine that accepts and transmits data on the BSC line. A function selector routine that dispatches one of the processors
when a request for services is received. Buffer blocking and deblocking routines.
The SML line driver supports programmable remote HOST and RJE modes) for HASP- and ASP-type systems.
processing mode in which a remote station may·submit receive print and punch output froa VM/370. RJE mode mode in which VM/370 may send jobs to a remote
processing and receive print and punch output from
stations (in both HOST mode is that
jobs to Vft/370 and
is that processing
batch system for
the remote batch
Figure 5 shows the types of data flowing to and from RSCS via the S!L line driver Frogram. 3-1q IBM VM/370: system Logic and Problem Determination--Volu.e 3
VM/370 RSCS .. SML , in ... I HOST Mode
RJE Mode
VM/370 RSCS SML in .if RJE Mode I( .... Jobs
PRINT and PUNCH Output
Jobs ..
PRINT and PUNCH Output II.. ) ... A ) ... Remote
Work Station Remote
Batch System Figure 5. Data Flow between Rses and Remote Stations via the set Line
Driver SML PROCESSORS To support the HOST and RJE processing aodes, the SML program provides
seven "processors," or routines, that handle the seven functions
required to support the two processing modes. Figure 6 is a list of the SML processors, the processing modes they support, and a brief statement
of their function. When a command is transmitted from a reaote station to RSCS, receives the command and coordinates processing of the command
supervisor routines and the REX task command module DMTCMX. SI!L with
The SML Frocessor, $WRTN1, processes a command request from a reaote
station by Fassing a command request element to the REX task (module DMTCMX) via a GIVE request. DMTCMX then determines whether the co.mand
should be executed by DaTCeX, DMTAXS, or bi the line driver. If tbe
command is to be executed by the line driver, it is passed back to SlL via an ALERT request. The SML routine CMIPROC then executes the
command. RSCS Introduction 3-15
Previous Page Next Page