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Sharp MZ-5500 Tehnical Manual

Sharp MZ-5500
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15.
Video
display
circuit
The
video
display
circuit
is
basically
the
same
for
both
the
MZ-5500
and
MZ-5600
which
features
the
following.
15-1.
Features
of
th~
video
aisplay
circuit
°Bit
map
method,
complete
graphie
display
°The
~PD7220
Graphie
Display
Controller
(GDC)
is
used
for
the
video
display
controller.
°Meets
resolution
of
640
x
400,
640
x
200,
320
X
400,
and
320
x
200
dots.
°Possible
to
perform
'
multiple
window
display
up
to
four
windows
by
means
of
the
Window
Controller
(WOC)
of
the
hardware.
°Possible
to
access
the
video
RAM
from
either
the
CPU
or
the
GDC.
As
the
display
cycle
is
divided
into
the
GDC
cycle
and
the
CPU
cycle,
it
permits
faster
access
from
the
CPU
to
the
video
RAM
with
less
waits.
°Incorporation
of
the
external
clock
input
and
the
externa~
vertical
sync
input
pe
rmits
superimposition
on
sucl1
as
TV
broadcasting,
VTR,
video
disk,
etc.
However,
both
the
software
and
the
hardware
dc
not
support
it
at
pr
e s e
nt.
alt
has
96KB
of
the
video
RAH
as
a
standard
equipment
and
can
be
expanded
to
192KB
when
the
option
is
used.
°The
hardware
character
generator
is
not
provided
as
standard.
01
ncorporates
the
pallet
function
and
color
priority
function.
~Possible
to
handle
eight
colors
and
eight
monochrome
tone.
Table
15-1
Mode
specification
,
[Color
mode)
(Color
CRT)
°Possible
to
make
choice
of
eight
colors
for
each
dot
for
three
planes
of
0,
I J
and
2.
~
°Possible
to
assign
eight
tones
for
the
background
color
of
each
window.
°Possible
to
make
choice
of
eight
border
colors.
(200-raster
eRT
only)
°Possible
to
specify
priority
for
desired
four
colors
and
any
one
color.
°Possible
to
change
any
color
to
any
of
other
sev~n
colors
in
terms
of
the
hardware
by
means
of
the
pallet
function.
(Monochrome
CRT
tone)
°Possible
to
make
choice
of
eight
colors
for
each
dot
for
three
planes
of
0,
1,
and
2.
°Possible
to
assign
eight
stages
of
the
background
for
each
window.
°Possjble
to
make
choice
of
eight
border
tones.
(200-raster
eRT
only)
°Possible
to
specify
priority
for
desired
four
tones
and
any
one
tone.
°Possible
to
change
any
tone
to
any
of
other
seven
tones
in
terms
of
the
hardware
by
means
of
the
pallet
function.
[Monochrome
mode)
°Possible
to
overlay
planes,
0,
1,
and
2.
°Possible
to
reverse
any
window.

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Sharp MZ-5500 Specifications

General IconGeneral
BrandSharp
ModelMZ-5500
CategoryDesktop
LanguageEnglish

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