Standard Features 29
Not
all
SVGA
monitors
support
resolutions
and
refresh
rates
beyond
640
x
480
at
85
Hz.
Do
not
attempt
to
drive
a
monitor
to
a
resolution
or
refresh
rate
beyond
its
capability.
NOTE
The VMIACC-0586/ACC-0586RC or the VMIACC-0590/ACC-0590RC RTMs are required for graphics
operation when using the digital video out the P2 backplane connector.
The default setup in the BIOS for Digital Video Output is 800x600.
2.6.1 Digital Visual Interface (DVI)
The
VMIVME
‐
7807/VME
‐
7807RC
have
a
Digital
Visual
Interface
that
provides
a
high
‐
speed
digital
connection
for
visual
data
types
that
are
display
technology
independent.
DVI
is
a
display
interface
developed
in
response
to
the
proliferation
of
digital
flat
‐
panel
displays.
For
the
most
part,
these
displays
are
currently
connected
to
an
analog
Video
Graphics
Array
(VGA)
interface
and,
thus,
require
a
double
conversion.
The
digital
signal
from
the
computer
must
be
converted
to
an
analog
signal
for
the
analog
VGA
interface,
then
converted
back
to
a
digital
signal
for
processing
by
the
flat
‐
panel
display.
This
inherently
inefficient
process
takes
a
toll
on
performance
and
video
quality
and
adds
cost.
In
contrast,
when
a
flat
‐
panel
display
is
connected
to
a
digital
interface,
no
digital
‐
to
‐
analog
conversion
is
required.
DVI
uses
Silicon
Image
ʹ
s
PanelLink,
a
high
‐
speed
serial
interface
that
uses
Transition
Minimized
Differential
Signaling
(TMDS)
to
send
data
to
the
monitor.
The
DFP
and
VESA
Plug
and
Display
interfaces
also
use
PanelLink.
For
this
reason,
DVI
can
work
with
these
previous
interfaces
by
using
adapter
cables
(depending
on
the
signal
quality
of
the
adapter.)
DVI
also
supports
the
VESA
Display
Data
Channel
(DDC)
and
the
Extended
Display
Identification
Data
(EDID)
specifications.
DDC
is
a
standard
communications
channel
between
the
display
adapter
and
monitor.
EDID
is
a
standard
data
format
containing
monitor
information
such
as
vendor
information,
monitor
timing,
maximum
image
size,
and
color
characteristics.
EDID
information
is
stored
in
the
display
and
is
communicated
over
the
DDC.
EDID
and
DDC
enable
the
system,
display
and
graphics
adapter
to
communicate
so
that
the
system
can
be
configured
to
support
specific
features
available
in
the
display.
Table 2-3 Supported Graphics Video Resolutions for Windows XP (Analog)
Screen Resolution
Maximum Colors
Maximum Refresh Rates (Hz)
640 x 480
High and True are supported at all resolutions.
85
800 x 600
85
1024 x 768
85
1080 x 1280
75
1600 x 1200
60