-a:
XON Pacing Character
Definition:
For
HP
Internal Use
Only
This character causes
the
lAP
to
resume passing characters
to
the
console
terminal
(or
terminals)
if
all connected console terminals are
not
in
the
XOFF
state.
This character is
flagged as a special
character
and
passed on
to
the
host system. See
the
section on Console
Flow Control for more details.
-s:
XOFF Pacing Character
Definition:
This character causes
the
lAP
to
stop passing characters
to
the
console terminals. This
flow
control character
may
be sent by either
the
master
or
the
slave console
terminal,
and
the
lAP
must
respond
to
either
terminal
sending
the
XOFF
by stopping
the
flow
of
characters
to
the
terminal.
The
lAP
will
not
send characters
to
either console terminal if one
of
them
has sent
an
XOFF.
To prevent
both
terminals from being locked up, each time
an
XOFF
is received,
a two second
timer
is
initiated
for
the
port
at
which
the
XOFF
was received. After two
seconds elapse with no
XON character from
that
port,
the
transmitter
will be re-enabled
and
character
transmission will resume. See
the
section on Console Flow Control for more details.
-v:
Escape Character
Definition:
Entering
this
character
on
the
active console
terminal
nullifies any special
character
processing
of
the
following
character
(with
the
exception
of
the
XON
and
XOFF
character)
and
the
AV
character
is ignored.
Thus,
for example:
vi
users will need
to
enter
AB
preceded by a
AV
to
page backwards while in console mode.
BREAK: Change Console Keyboard Master
Definition:
Entering this character from
the
slave console immediately switches
the
slave console
to
console
master
and
the
break character is
put
in
the
bit bucket.
When
this character is
entered from
the
console
master
however,
it
is sent on
to
the
host system.
lAP Initiated Self Tests
The
Integrated Access
Port
also has
the
ability
to
initiate
a card self test (using
the
TA
command). While
parts
of
the
I/0
card with
the
Integrated
Access
Port
must
be completely
functional in order
to
have
the
lAP
start
the
self
test,
there
may
be
some critical function
that
is required
to
boot
the
system
that
is
not
used by
the
lAP
to
communicate with
the
console
terminal.
The
self
test
that
the
lAP
initiates should provide a sufficient
test
to
verify
the
card
is functional, as far as
it
is capable
of
testing itself. Since this card is
the
first line
of
defense
for
supporting
the
SPU
hardware, this
test
must
be complete.
9-14 Functional Description
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