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Sharp MZ-800 Service Manual page 19

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1) 320
x
200 dots
See the figure below for VRAM configuration and
CRT character display position.
VA
ve
(option)
$0000
0
0
1
1
2
2
I
I
40
I
I
I
I
I
Plane I
I
I
I
I
I
I
I
I
I
($1F3F )
7999
Not used
$2000
0
0
1
1
2
2
I
I
I
I
I
I
I
I
I
I
I
Plane II
I
I
I
I
I
7999
Not used
$3FFF
2) 640
X
200 dots
Because it operates in the cycle steal mode, two
bytes of display data are fetched during one byte
display cycle. (See the chart in separate page.)
See the figure below for VRAM configuration and
CRT character display position.
$0000
($1F3F )
$2000
($3F3F)
$3FFF
0
2
4
I
I
I
80
I
I
I
I
I
15988
Not used
1---, ---
3
5
:
79
I
I
I
I
I
I
15999
Not used
VA
(Plane I)
0
2
4
I
I
I
I
I
--,---
3
:,
I
I
I
I
I
I
I
ve
(option)
(Plane Ill)
>
Plane III
Plane IV
18
2
; I :
I
I
I
: I
I
I
I
2~
17960
(Raster)
2
3
2
40
---"DJ
~
I
I
I
I
----hd
7999
----
eRT display position
2
3
4
80
o
I ' I '
t'
I-~EJ
80
__
--l--H
I
I
I
I
200
"'-159-20--1---+-1
~::::::::::::::::::
i ' ' ' ' '
I
eRT display position
MZ-800

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Mz-1p16Mz-1e20