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S)'llta:
Rl
flnlcede-: R (82D =-S2H)
•~
=
None
F'llncdoe:
Fast Read
mode.
witho
ut
picture reseore .ifte
rscarch.
Video switched
off
af1e
rsearch.
This
is
the powe;-on default s1a1e.
SPCCIALISSUES
SCSJ
. , . _
seftio1(Fi1. IO)
Ex
h
devke
connected to
the
SCSI
bus must
have its
own
unique
address.
This isin
the
rangeO· 7.
lfthe address is no
l lhal expected by
1he
ltost computer.
the
VP415 will not be recognfflotd. l1lc factory
seuingts
addressO.
fla.
10: SCSI
add, -
dip
switdtes.
1lte SCSI bus address of
1he
VP41
5
may be altered
by
ch,mging
the
posilk>m
of
the
SCSI
ADDRESS dip switches silualcd .ii the rear of
lhe
ptayer. A switch in the 11p position is
O
FF.
Swit(ltes
I - 4
a
nd swit(h
8
s~ld be OFF. Switches
S • 7
detennine
the
SCSI addres.5
as
follows:
.......
swilc:hS
swildi6
switc:t.7
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
OFF
OFF
ON
ON
ON
OFF
OFF
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
Successful n
ec11tion of
the
Start-unit
commaMI
alwa
ys brings the
system
10
the
same
condition
regardless o
f the
coodilions
present
immediately
before.
If an
initiato r,
connected to
!he
SCSI bus
is
not powered up, ii is
possibk
1h11 the reset line will be pulled active
low
and the LV-DOS
control
will be in i1s reset condi1ion. As such
1hc:
LV·DOS connoller
will nol
lake
control of the player which will
subseque ntly
behave
as
if
there is no controlle
ratall.
Any
action
th11
affects
the
sync
si1nal from
the
ini1ia1o
r
10
which
the
playe
ris
1enloc:kcd
c.1.
a cha
n1c
of video mode
,
will nuse
the player
10
genlock by changing the disc
speed.
During a
speed
ch.inge
i1
is
pos.sible
1ha11he1olerances
forreadingdigitald.11a
a reuceeded,in
which
case
the
system
may retry
to
read dani, o
r
c:veu
register a media
.......
If
JM:USSary,
LV-DOS will
ma
ke
a number o
f relrin. However it
is
Yel}' unlikely tha
t an unsuccessful command
w
ill
be s=s.sful on a
re
ny
fro
in
the
host, and it is
recommended
tha1
the initia1o
r does not
issue retries
if
a
command fails.
Twereapat1nhyia11otak1~trol
The
RS2.32-C
serial
inte
rface o
f the player
also
c:Aables
an
exte
rnal
syste
m
to<:0ntrol the
player.
The system can
only •Jiscen'
1oone channel
41
at a time, and if
IWO
sy1tems arc simultanco115ly trying
to
control the
playe
r, it is
pmsible
that
1hc
SCSI initiator
ma
y lose
control
Any subsequent command
,
with the exception
o
f mode select · F·
codes,
will 1hen be ignored. Initiator ron1rol of
the player
m ay
be
resumed
by
i55utng a Sta
n-unit
command to
the
L
V-DOS
co,11,olkr
The command
may
re1urn
a
'media
erro
r·
o
r ·uni1 not ready'
sense
key,
but in
either
case
1he
SCSI
ini1ia1or
now
has
control of the
player.
Cllaagiagclilc
~
_
.,nua.1orco11trol
To
change
1M d
isc.
i:.we the
S1op-unit command followed by the
Eject
command.
Poll 1he
player
stalus by sending the
Playe
r
sC.ilusco
mmand
?P
and read
lhc
reply
code
until the reply code
acknowledges
lb.ill
the
disc-tray
is
ck>scd .igain. Then issue the Start-unit command
Co
log
on
the disc. You
may Y
erify lhal the disc is logged on with the Tc:u unit
ready command. This ts not necessary however if lhe S1art-11ni1
re
turned
no
error.
Verifythe identi1yofthediscandbesurc:
1h.acallthe
player
modes a re
SCI
aceording lo your application.
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