Installing The Llm Board In The 990/5 Computer - Texas Instruments 990 User Manual

Constr uction and Acti vation
where:
<control> is the filename specified in resfX)nse to the
LREMSCI command previously executed.
<linkfile> is the name of the file that must be included
in the TX5 I ink control stream. The same
remote SCI obj ect file can be used for all TX5
s econdar y links.
<1 isti ng>
is the name of the file to which
generated during the linking
written.
the messages
process are
The default print width value, 80, should be taken for a standard
listing file or device.
It is tossible to include both the operator communication package
(OCP) and remote SCI (REMSCI) in a TX5 secondary station. If
REMSCI is required
but
OCP is not, include the REMSCI log task
and the dummy log OSR. In this case, the TX5 warm-start and
di agnostic messages are di rected to the OXIO system log.
If roth REMSCI and OCP are requi red, do not incl ude the REMSCI
log
t
as k
0
r the dumm y log OS R. In t hi s cas e, the warm- st ar t and
di agnosti c messages are di rected to the TX5 log.
3.4.3 Installing the LLM Board in the 990/5 Canputer
The LLM switches and jumpers must
be
set correctly and the LLM
card must
be
installed at CRU address >20 in the TX5 secondary
station before communications can be established. Addi tionally,
a sui table interr upt level for the board must be sel ected. Thi s
interrupt level must
be
correctly wired and correctly specified
during TX5 system generation. The priori ty level selected should
be sufficiently high to permit the communications software access
to the LLM card when an interrupt is pending. Any preemption of
the secondary station . . . . s communications facilities result in the
primary station aborting communications after a specified time
and termination of the request to the secondary station. User
programs should not be assigned priori ty level 0 and any
excessively busy CRU device should not
be
assigned an interrupt
level aoove the LLM car d.
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