Figure 17.
PUTBLOCK Deblock the
Buffer from
the BSC Line;
Write Data
to VM/370 SP.ool System. MAKEBLOC Get a Block of Data from
the VM/370 Spool System. CMDPROC Process a
Command
Received Over the BSC Line. RECVRFY Obtain Data
Buffers from
the BSC Line.
and Verify
the BSC Control Characters.
GETBLOCK Build a
Buffer for
the Appropriate
Hardware
Device.
Supervisor Routines
NPTGET
Cycle Every
Three Seconds
to Check for: • A Command
to Proces'S • A File to
Transmit • A File to Read SENDVRFY Check SSC Control Characters
After Writing
a Block of
Data to the SSC Line. LlNEIO Read Data
and Write
Data on
the BSC Line. Program Organization for the NPT Line Driver Task
3-38 IBM VM/370: System Logic and Problem Determination--Volume 3 t-----::7 BSC Line

RSCS Directories
The following directories are contained in this section: • Rses "odule Directory • Rses Module Entry Point Directory • Rses "odule-to-Label Cross Reference
e RSeS Label-to- Plod ule Cross Reference
Rses Directories 3-39