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MZ
3500
6)
Screen overlay
and
displaying
on two
independent
CRT's
As
there
are two
video
output
channels
it
will
be pos
sible
to
display
two
independent
screens
on
separate
video
display
unit
Overlay
is
possible
on
either
of
screens
(See
preceding
item
5) ) The
following
bit
selection
is
needed
for
screen
overlay
;p
i
;P2
Address
Hex
50
51
52
53
54
55
(50)
56
57
5D
AS AS AS AS
3210
0000
000
0010
0011
0100
0101
0110
0111
1101
Data
DS
DS DS
2 1 0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Internal
S
gnat
name
of CSP
ECH1
ECH2
EAT2
SR1
SR2
SR3
SR4
SR5
SR6
BGC
B
BGC R
BGCG
COLOR
BODER
08/16
40/80
RA-400
V
RAM2
V
RAM1
25/20
08/16
40/80
Function
Choice
of
outputting
the
character
screen
on
CRT1
0 No 1 Yes
Cho ce of
outputting
the
character
screen
on
CRT2
0 No 1 Yes
Choice
of
whether
attribute
or
cursor
be put on the
frame that displayed
on
CRT2
(0 No 1
Yes)
Displays
on
CRT1
the
blue elements contained
in the
VRAM
Displays
on
CRT1
the red
elements contained
in the
VRAM
Displays
on
CRT1
the
green elements contained
in the
VRAM
Displays
on
CRT2
the
blue elements contained
in the
VRAM
Displays
on
CRT2
the red
elements
contained
in the
VRAM
Displays
on
CRT2
the
green elements contained
m the
VRAM
[
Choice
of
background color display
Color mode
Border
color mode
in
effect
Defines
the
data
size
for the
graphic
RAM (0 8
bits,
1 16
bits)
Defines
display digits
for the
character screen
(0
40
digits
1 80
digits)
Connection
of a 400
raster
CRT
Connection
of the 96K
bytes
VRAM
Connection
of
graphio
GDC
25
lines/20 lines switching
(0 25
lines,
1 20
lines)
Defines
data
size
for the
graphic
RAM (0 8
bits
1 16
bits)
Defines
display digits
for the
character
screen
(0
40
digits,
1 80
digits)
NOTE Both CRT1
and
CRT2 must
be
high resolution CRT's (640
x
400)
or
medium
resolution CRT's
'RO x
Output
to
each
CRT may be
possible
in the
following
combination
.
Output
to
each
CRT may be
possible
in the
following
CRT1
CH
( AT )
C.KA7
)
CH AI
)+(,!
^ AT)
CRT2
CH(
AT)
(,f-
AT)
CH(Ar)+(,!
M
CH
(.1-
CH+GI
CH
ASCII
GF
Graphic
screen,
including
overlay
of two
graphics
screens
(AT)
Attached
with
attribute