Sage II - Display Results; Print Results

SAGE
Ir SERVTCE MANUAL
[1.0]
CYCLER TEST
PARALLEL
TEST
XI.O6 PARALLBL TEST :
The
connector
provided
ln the
servlce
klt
must
be
attaehed
to run
thls
te8t.
The PARALLEL test checks the
parallel prlnter port
and the
CD
(carrler
detect)
and RG
(Rtnglng
Detect)
of the
"MODEI'f'
port.
ltre
data blts of
the
port
connect
to
a
7
4LSI57 multlplexer
which w111 select
between
the
odd and even bits dependlng
on the
status of
PRIME. The
output of the
74LSL57 ls to
the BUSY,
PAPER,
SEL
and
FAULT
lnput slgnal"s.
Ar
assembly
code routlne
TST CONT
ls
used to change
PRIME
and
STROBE
for
the test.
UNITREAD,
UNITI{nTtn,
AM
UNITSTATUS
are
used to transmir and
read rhe
data.
The
parallel
test does these operations:
1.
The
The
current
parallel
port
configuratlon
is
saved.
test
conflguration
ls
defined
for
the BI0S.
PRIME
is
set
low,
CD ls checked.
4. Blts
0r2r5
and
7
are tested through the
74LSL57.
5.
PRIME
ls
set high,
CD
is
checked.
6.
Blts
1r3r4
and
6
are
tested through
the
74LSI57.
2.
3.
7.
ls
8.
9.
STROBE
STROBE
1s
set low, RG ls
checked.
set
high,
RG ls
checked.
The current
conflguration ls
restored.
If any of the
tests fail
r
dD error will
be logged and
the
test w111
be
turned
of
f
.
At the
end of
Ehe
test
r
or when
an
rf
Escrr ls
typed
,
a
parallel
test
error will
show as:
PAMLLEL
T8ST..........
o.,.
FAILED
***
err
message
)o'lT= x
RCV=
where
the
error
message
describes
the
flrst
test that falled.
RCV
are the
values
Lransml-tted
and
received.
ruT
and
33