Sage II - Disk Alignment Test Select

sAcE
II SERVICE
MANUAL
[1.0J
CYCLER
TEST
SERIAL
TEST
(cont)
At the
end of
the
test
r
or when
an
rrESCrf
is
w111
ehow
as:
typed,
a
serial
test
error
SERIAL
TEST..,......
o..,..
o FAILED
*****
err
message
)OIT= x RCV=
where
the
error message
descrlbes
the first
test that failed.
)O{T
and
RCV are the
values
of the
byte
being sent and received.
Posslble error
messages
are:
Bad
buffer
sl-ze
The size
of the recelve
buffer
should be
0-255.
Anything
else
indlcates
a
system
errorr
possibly
a bad BIOS
or
memory error.
DSR
should
be the same as
DTR. Check
U60
and
U59 Check
also
to see that the
servlce
kit
connector
1s
rnounted correctly
and that
the
wlre
is not
broken.
DSR
should
be the same as
DTR. Check
U60
and
U59 Check
also
to see that
the
servlce klt
connector
ls
mounted
correctly
and that the
wire
ls not
broken.
Wtth
CTS
disabled, no
data
can fo recelved.
A
5
byte transmisslon
ls set
up.
A timeout
on receive
should
occur and test
w111
contlnue.
If thls
error occurs
,
CTS dld
not
go
low
and data
was
received.
CTS should
be
enabled,
the check for
recelve
should
NOT tlmeout,
Ttre
5
bytes have
arrl-ved.
The
5
bytes
sent when
CTS
was
disabled are
checked for
their
values.
If they
dlffer
from
what
was
sent,
check
for
shorts
on the
ru(D
and
TXD llnes,
replace
the
USART.
255 bytes
r
v8lues=
0-255,
are
sent and
DTR to
DSR
=
low
DTR to
DSR
=
hlgh
RTS to
CTS
-
low
RST
to
CTS
=
hlgh
5
byte
transfer
255
byte transfer
recelved.
If the
byte
recelved
does not
match the
byte
sent then this
error
occurs,
the
ruT
and
RCV lndlcate
the
transmLtted
and
received
values.
of
the
port
are
tested ln
the
PARALLEL
test.
The
CD
and
RG
connections
32