Specifications

TEST LEDS REGISTER
The TEST LED's re~ister is used to turn on/off the 4 red led's and 1 ~reen led
located on the rear of the DPM board. These LED's are used by the micro-
diagnostics to indicate failure of any of the major sections of hardware in
the VSi00 system.
address = 800080 (HEX)
WRITE ONLY
BIT 7
6
5
4
3
2 1
o
I XX I XX I OK I G5 I R3 I R2 I Rl I RO I
bit
7
=
RESERVEII
bit 6
=
RESERVED
bit 5
=
TEST
OK
Used
in
the
manufacturing
enviroment.Indicates
that the
VS100 has
SIJccess fu 11 y passed
blJrn-in
self test.
NOTE self
test
takes
app ro}{
20
sec.
logic
1
(3'1)
=
test
passed.
cleared
on
power-uP,
reset b~ the
host,or
e!·~terrlal
irti t.
logic
0
(Ov)
=
test failed.
bit 4
=
greer.
led
logic
1
(3'1)
=
led off
logic
0
(Ov)
=
led on
indicates the VS100 has
passed
power-uP
self
test
bit
3
=
red
led
3
logic
1
(3v)
=
led off
logic
0
(0'1)
=
led or.
bit
2
=
red led
2 losic
1
(3'1)
=
led
off
logic
0
(0'1)
=
led or.
bit
1
=
red
led
1
losic
1
(3'1)
=
led off
losic
0
(0'1)
=
led
on
bit
0
=
red led
0
losic
1
(3'1)
=
led off
losic
0
(0'1)
=
led
on'
REFER TO
SECTION 7.5 FOR
A
COMPLETE DESCRIPTION
OF
THE TEST LEDS ERROR
COIlES