Table of Contents
Advertisement
The
telephone
ring
detect
flag
(event
2)
is
set
whenever
a
ring
detect
interrupt
occurs,
and
will
be
reset
30 seconds
later.
Whenever
the
ring
detect
flag
is
set,
the
ring
detect annunciator
on
the
bottom
line
of
the
system
display
will
flash.
An
application
program
may
turn
the
ring
detect
annunciator
on
or
off
by
setting or resetting
this
event
flag.
The
break key
detect
flag
(event
3)
is
set
whenever
the user
presses
the
break
key.
The
alarm annunciator
flag
(event
4)
is
set
when
an
annunciator type alarm
set via function
DEh
occurs.
Whenever
this
event
flag
is
set,
the alarm annunciator
on
the
bottom
line
of
the
system
display
will
flash.
An
application
program
may
turn
on
or
off
this
annunciator
by
setting
or
resetting
this
event
flag.
The
timer
channel
flags
(events 8-15)
whenever
the
corresponding
interval
timer
reaches
its
set
interval.
The
com
activity
flags
(events 16-31)
will
be
set
whenever a
character
is
received
on
the
corresponding
com
channel.
With
the
exception
of
the
telephone
ring
detect
event
flag,
HH
O/S does
not reset
the event
flags.
It
is
the
responsibility of
the
program
monitoring the event
to
reset
the
flag.
68
Advertisement
Chapters
Table of Contents
