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CHAPTER 1
INTRODUCTION
1. General
1.01 PERCEPTION,
and PERCEPTION,,
are
both stored program-controlled
systems
which uti-
lize a 16-bit microprocessor
as the central process-
ing unit (CPU). The system memory
is made up of
Read
Only Memory
(ROM),
Dynamic
Random
Access Memory
(DRAM),
and Static Random
Ac-
cess Memory
(SRAM). The small amount
of ROM
that is provided
contains
the "Loader" program
for
the 3.5inch
disk drive (NFDU
card). When
the
system is initially powered
up or is reset manually,
the remainder
of the Operating
System
programs
and Customer
Data will be loaded
into RAM from
the disk, under the control of the Loader
program.
1.02 Since Dynamic
RAM is volatile (its contents
are lost when power is removed),
the disk remains
in the system as backup.
If a reload is required,
the
entire system program
and customer
database
will
reload in approximately
45 seconds.
In Lodging/
Health
Care
operation,
some
customer
data
is
stored in Static RAM in order to protect it in case of
a power failure.
2. Dual Disk Operation
I
2.01
PERCEPTION
e&ex systems
with D.02 soft-
ware and above,
utilize two floppy disks (FDs) for
the storage
of operating
and maintenance
data.
One of these disks (the System
FD)
is used specifi-
cally for the system
program,
customer
data, and
the DSYS,
DTRF,
and TPER maintenance
pro-
grams, while the other disk (the Maintenance
FD)
is used exclusively
for all other maintenance
pro-
grams.
A separate
disk drive for each
disk is
required
for remote
maintenance.
Systems
with a
single disk drive must interchange
disks manually
in order to perform
the various
system
program-
ming functions.
The System
FD is inserted
for
system program
loading,
data saving, and system
operation,
while the Maintenance
FD is inserted for
system programming
or the performance
of main-
tenance
operations.
Dual-drive
systems
require
PROGRAMMING PROCEDURES
SECTION 200-255-301
JANUARY 1993
the insertion of the System FD in FDDO, followed by
the insertion of the Maintenance
FD in FDDl.
The
various steps involved in floppy disk installation
for
both single- and dual-disk
systems
are noted
in
Table l-1.
3. Customer
Data
3.01 All PERCEPTION,,,,
options are controlled
by entries made in the Customer
Database.
Tables
are provided
for defining
System Parameters
and
Trunks, as well as individual
station features.
The
Customer
Data is unique
to each system
and is
usually entered by using a keyboard
terminal.
After
the data has been entered
into system memory,
a
simple keyboard
command
causes it to be copied
onto the System FD, where it remains
as a perma-
nent record.
4. Utility
Programs
4.01
In addition
to the Operating
System
Pro-
grams
and Customer
Data, the System
FD also
contains
many Utility Programs,
which are used to
program
and maintain
customer
data. The Utility
Programs
are divided into three main groups:
1) Data Input Procedures
2) Data Output
Procedures
3) Maintenance
Procedures
4.02
When
required,
a Utility
Program
can be
called up by entering
a command
via the keyboard
terminal.
The system
will respond
by locating the
proper Utility Program on the proper floppy disk and
then loading it into the memory overlay area. When
the loading is completed,
a prompt will be output to
the terminal.
The overlay area can accommodate
only one Utility Program
at a time. When a program
is called up, the previous
program
will be taken out
of the overlay.
NOTE:
Any disk failure will cause an error code to be
output to the terminal.
See Table 19-6 for the
list of error codes.
l-1
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