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Sharp MZ-800 Technical Reference And User's Guide

Sharp MZ-800
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Scroll and control
circuit
hardware
• Block diagram
DA(MA)
7
Relation
of
display address, SEA, SSA, vs
SOF
Display
address
m I k
j
SSA
SSA
SSA SSA
SSA
6
5 4 3
SEA
SEA
SEA
SEA SEA
6 5 4 3
SOF
SOF
SOF
SOF
SOF
9
8
7
6
Screen
left
end
address
0
Line
0
0 0
0
1
Line
0 0 0
0
2
Line
0
0
0
0
3
Line
0
0
0
0
8
Line
0 0 0
0
16
Line
0
0
0
24line
0
0 0
192
Line
199
Line
Relation
of
SW vs SOF
SW>
SOF
i h
SSA SSA
2
1
SEA
SEA
2 1
SOF SOF
5 4
0 0
0
0
0 0
0 0
1 0
0
1
1
1
0 0
0
11
Scroll control register
SSA:
Scroll start address
Increment
of
SSA:
$5
Minimum
value
of
SSA:
$0
Maximum
value
of
SSA:' $78
MSB
LSB
N
6
5
4
3 2
SEA:
Scroll end address
Increment
of
SEA: $5
Minimum
value
of
SEA:
$5
Maximum
value
of
SEA: $70
MSB
LSB
N
6
5 4 3
2
SW: Scroll
width
Increment
of
SW: $5
Minimum
value
of
SW: $5
Maximum
value
of
SW:
$70
Relation
of
SW, SEA, vs SSA
SW=
SEA-
SSA
SW>
SSA
MSB
LSB
N
6
5 4
3 2
s~
I
SOF:
Scroll offset
Increment
of
SOF:
$5
Minimum
value
of
SOF:
$0
(without
offset)
Maximum
value
of
SOF:
$3E8
MSB
LSB
SOF
1 I
7
6
5
4
3
2
S~F
I
MSB LSB
SOF
2~------------~
9
S~F
I
g I f
e d
I
c
b
a
SSA
_
-
0
SEA
I
S~F
fs~F
S~F
~-
SOF
3 2
I
I
I
0 0
0
0
0 0
0
0
1 0 1 0
Q
0
First
line
1
0
0
0
0
0
1 0 0 0
1 0 0
0 0
0
0
Second
line
0
0 0
0
0 0
0
Second
line
1
0
0
0 0
0
0
0
0 0
0
0 0
0
Twenty fifth line
0 0 0 0 0

Table of Contents

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Owner's Manual221 pages
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Sharp MZ-800 Specifications

General IconGeneral
BrandSharp
ModelMZ-800
CategoryDesktop
LanguageEnglish

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