Sage II - Maintenance Tests

sAcE
rI
SERVTCE
MANUAL
[1.0]
POWER-UP
ROUTINE
MAINTEI.IANCE
TESTS
VII.O5
UAINTENAITCE
TBSTS
:
ROM
program
verslons
after
3-Jan-83
have
addltlonal
dlagnostics
that
are
controlled
by
the
GROup
A
swlrches
at
the
back
of
the
sAGE:
sn6
srf5
srfA
sY3
snz
snl
dwn
dwn
dwn
,.o
...
...
...
dwn
dwn
up
dwn
up
dwn
dwn
dwn
dwn
up
up
dwn
uP
up
up
dwn
up
up
I'lhen
the
system
ls
reset
a
message
f
or
the
type
of test
will
be
dlsplayed.
For
example:
"SAGE
II
Startup
Testst'
frltAlrt
write
looptt
The
Bypaesed
Inlt selectton
overrldes
the
normal
startup
sequence.
I^lhen
the
reset
button
ls
pressed
the
debugger
ls
automatlcally
entered.
The
memory
can
be lnspected.
Regtster
contents
are
invalid
as
they
cannot
be
saved
on reset.
stack
memory from
400H
down
is
,*
.,,d
by
the
debugger
8o
these
locatlons
nay have
changed.
The flag
at
104H is
also
cleared
so
that
the
debugger
w111
not
attenpt
to
use
the
BIOS.
The
Iooped
test
selectlon
repeats
the
startup
tests
in
pROM
over
and
over
agaln.
ThLs
ls
useful
when
watching
slgnal
1lnes
wlth
the
oscllloscope.
If the
tests
are
seccessful
the
LED iernal-ns green
for
the
duration
of
each
pass
and
bllnks
red
at
the
end
of each p.*r.
If any
test
falls
the
Processor
ls
stopped
and
the
LED
is
set
RED.
Ttre
swltches
must
be
changed
back
(
Swttch
8
to
dwn and
swltches
5
&
6
to
your
deslred
bootstrap
selectlon)
and
the
system
reset
to
get
out
of the
exercise
loop.
The
RA}i
rrLte
loop
contlnuously
loops
through
a
selected
bank
(1ZAX)
of
memory
wrltlng
0000
or
FFFF
as determlned
by swltch
3
of
GROUP B:
"'
if'"
fur
* ttnr
i: :ri
*#'E-488
address)
sn8
sw7
up
up
up
UAINTET|ANCE
TEST:
Bypassed
lnit
Iooped test
(PROM)
MM wrlte
loop
00000
ro
IFFFE
20000 ro
3FFFE
40000
to
4FFFE
60000
to
TFFFE
Iooped
test
(Reserved)
T4