IBM 770 User Manual
Video Modes
The video subsystem supports the modes listed in Figure 3-1 and
Figure 3-2 on page 3-4:
Figure 3-2 on page 3-4:
Figure
3-1. BIOS Video VGA Modes
Expanded
Size
XGA
960
×
600
960
×
700
960
×
600
960
×
600
960
×
700
960
×
600
960
×
600
960
×
600
960
×
700
960
×
600
960
×
600
960
×
600
960
×
700
960
×
700
960
×
720
960
×
720
960
×
600
Pels
320
×
200
320
×
350
320
×
400
640
×
200
640
×
350
640
×
400
320
×
200
640
×
200
640
×
350
640
×
400
320
×
200
640
×
200
640
×
350
640
×
350
640
×
480
640
×
480
320
×
200
Max
Pages
8
8
8
8
8
8
1
1
8
8
8
4
2
2
1
1
1
Box
Size
8
×
8
8
×
14
8
×
16
8
×
8
8
×
14
8
×
16
8
×
8
8
×
8
8
×
14
8
×
16
8
×
8
8
×
8
8
×
14
8
×
14
8
×
16
8
×
16
8
×
8
Buffer
Start
Address
B8000
B8000
B8000
B8000
B8000
B8000
B8000
B8000
B0000
B0000
A0000
A0000
A0000
A0000
A0000
A0000
A0000
Alpha-
numeric
Format
40
×
25
40
×
25
40
×
25
80
×
25
80
×
25
80
×
25
40
×
25
80
×
25
80
×
25
80
×
25
40
×
25
80
×
25
80
×
25
80
×
25
80
×
30
80
×
30
40
×
25
Colors
16
16
16
16
16
16
4
2
–
–
16
16
–
16
2
16
256
Type
A/N
A/N
A/N
A/N
A/N
A/N
APA
APA
A/N
A/N
APA
APA
APA
APA
APA
APA
APA
Mode
(Hex)
0,
1
0
*
,
1
*
0#,
1#
2,
3
2
*
,
3
*
2#,
3#
4,
5
6
7
*
7#
D
E
F
10
11
12
13
Subsystems 3-3