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T T
E E
C C
H H
N N
I I
T T
E E
C C
H H
N N
I I
Initial set signals
Back porch b
Display interval c
Sync a
Computer /
Horizontal signal timing (µs)
Signal
a
VGA-1 (85Hz)
2.0
VGA-2 (85Hz)
2.0
TEXT
2.0
VGA (60Hz)
3.8
Mac 13"mode
2.1
VGA (72Hz)
1.3
VGA (75Hz)
2.0
VGA (85Hz)
1.6
SVGA (56Hz)
2.0
SVGA (60Hz)
3.2
SVGA (72Hz)
2.4
SVGA (75Hz)
1.6
SVGA (85Hz)
1.1
Mac 16"mode
1.1
XGA (60Hz)
2.1
XGA (70Hz)
1.8
XGA (75Hz)
1.2
XGA (85Hz)
1.0
1152×864 (75Hz)
1.2
1280×960 (60Hz)
1.0
1280×1024 (60Hz)
1.0
1280×1024 (75Hz)
1.1
C C
A A
L L
( (
c c
o o
n n
C C
A A
L L
( (
c c
o o
n n
Front porch d
b
c
3.0
20.3
1.0
3.0
20.3
1.0
3.0
20.3
1.0
1.9
25.4
0.6
3.2
21.2
2.1
3.8
20.3
1.0
3.8
20.3
0.5
2.2
17.8
1.6
3.6
22.2
0.7
2.2
20.0
1.0
1.3
16.0
1.1
3.2
16.2
0.3
2.7
14.2
0.6
3.9
14.5
0.6
2.5
15.8
0.4
1.9
13.7
0.3
2.2
13.0
0.2
2.2
10.8
0.5
2.4
10.7
0.6
2.9
11.9
0.9
2.3
11.9
0.4
1.8
9.5
0.1
t t
i i
n n
u u
e e
d d
) )
t t
i i
n n
u u
e e
d d
) )
Back porch b
Sync a
Computer /
Signal
d
VGA-1 (85Hz)
VGA-2 (85Hz)
TEXT
VGA (60Hz)
Mac 13"mode
VGA (72Hz)
VGA (75Hz)
VGA (85Hz)
SVGA (56Hz)
SVGA (60Hz)
SVGA (72Hz)
SVGA (75Hz)
SVGA (85Hz)
Mac 16"mode
XGA (60Hz)
XGA (70Hz)
XGA (75Hz)
XGA (85Hz)
1152×864 (75Hz)
1280×960 (60Hz)
1280×1024 (60Hz)
1280×1024 (75Hz)
Front porch d
Display interval c
Vertical signal timimg (lines)
a
b
c
3
60
350
3
41
400
3
42
480
2
33
480
3
39
480
3
28
480
3
16
480
3
25
480
2
22
600
4
23
600
6
23
600
3
21
600
3
27
600
3
39
624
6
29
768
6
29
768
3
28
768
3
36
768
3
32
864
3
36
960
3
38
1024
3
38
1024
TECHNICAL - 3
d
32
1
1
10
3
9
1
1
1
1
37
1
1
1
3
3
1
1
1
1
1
1
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