Sharp MZ-3500 Personal Computer User Manual


 
M-3500
CH48
-
0 For 40
digit
display
Relation
between VRAM
address
and
screen
1
: For 80
digit
display
There
is a
40/80 digit switching
signal
I/O
port
in the
gate
array
of
CSP1
and
CSP2,
but,
the I/O
signal
called
CH48
is
provided
apart
from
the I/O
port.
I
08/16
- I/O
port
inside
CSP1
and
CSP2.
7)
Graphic
V-RAM
Address
Relation between
VRAM
address
and
screen
(640
x 200
dots)
8-bit
structure
t
lnntn
"~^
~
Graphic
address
map
for
200
rasters
LXH)
liytr
0000
0050
00\0
OOFO
16-bit
structure
Graphic
address
map for
400
rasters
bOb\ir
CRTC block
diagram
Color graphic
VRAM
PWB
(option)