Section 060-INDP-111 System Description 2-71
BMC II BISYNC Operation, Administration, and Maintenance Guide BMCB001 and up
combined with a strong intercoupling of function modules. The BMC start-
up and scheduler consists of six modules:
• Process Scheduler
• Clock Services
• System Calls
• Memory Manager
• General Purpose Functions
• Human-machine interface functions.
Once the additional programs are loaded, there are a number of other features
used by the system. Scheduler routines control the activities of the
microprocessor and the clock circuits. Memory management modules assign
RAM areas to incoming data, temporary storage, vector tables, device status,
and other data structures, as required. File system routines direct the flow of
data to and from the disk. Error control functions, log and alarm messages,
command responses, and emergency access modules are part of the system
monitor.
System utility routines allow access to the memory, permitting examination
of the SCSI interface and processor files. The Switching System displays the
contents of these areas on the terminal for viewing by the craftsperson. The
utility routines also allow user programming to facilitate selection of features.
For example, menu choices, AMA or status report requests, or maintenance
and test procedures. Communications with the Switching System go through
the application software to reach the lower monitor routines.
Application routines
System instructions that are related to data handling or BMC features are
referred to as application routines. Software modules falling under the
application classification are generally higher level programs since more
complicated decisions and data manipulations are encountered here than are
required at the monitor level. Applications routines work directly with AMA
data, reports, files, and formatting. Because applications are basically stand
alone programs, they function independently with little or no
intercommunication.
The AMA application programs direct the processing of the call record data
received from the Switching System. AMA applications modules control the
flow of data from the interface to the disk, and from the disk to the HOC when
the stored records are polled. Other modules group the data into blocks and
perform the necessary protocol conversions to ensure that information is
uniform for transmittal to the Regional Accounting Office (RAO). If the call
records sent to the BMC are not completely structured, applications modules
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