![background image](http://html.mh-extra.com/html/nec/versa-2500-series/versa-2500-series_service-manual_249085098.webp)
Video Modes A-3
VGA EXTENDED MODES
The C&T 65548 VGA BIOS supports standard VESA and extended modes, listed in the
following table.
Table A-5 VGA Extended Modes (Text Mode)
Hex
Mode
No. of
Colors
Text
Display
Font
Size
Pixel
Resolution
Dot Clock
MHz
Horiz.
Freq.
KHz
Vert.
Freq.
Hz
60
16
132 x 25
8 x 16
1056 x 400
40.0
30.5
68
61
16
132 x 50
8 x 16
1056 x 400
40.0
30.5
68
Table A-6 VGA Extended Modes (4-Bit Linear Mode)
Hex
Mode
No. of
Colors
Text
Display
Font
Size
Pixel Reso-
lution
Dot
Clock
MHz
Horiz.
Freq.
KHz
Vert.
Freq.
Hz
20
16
80 x 30
8 x 16
640 x 480
25.175
31.5
60
22
16
100 x 37
8 x 16
800 x 600
40.0
37.5
60
24
16
128 x 48
8 x 16
1024 x 768
65.0
48.5
60
24I
44.9
35.5
43
Table A-7 VGA Extended Modes (8-Bit Linear Mode)
Hex
Mode
No. of
Colors
Text
Display
Font
Size
Pixel Reso-
lution
Dot
Clock
MHz
Horiz.
Freq.
KHz
Vert.
Freq.
Hz
30
256
80 x 30
8 x 16
640 x 480
25.175
31.5
60
32
256
100 x 37
8 x 16
800 x 600
40.0
37.5
60
34*
256
128 x 48
8 x 16
1024 x 768
65.0
48.5
60
34I*
44.9
35.5
43
Table A-8 VGA Extended Modes (15-Bit Linear Mode)
Hex
Mode
No. of
Colors
Text
Display
Font
Size
Pixel Reso-
lution
Dot
Clock
MHz
Horiz.
Freq.
KHz
Vert.
Freq.
Hz
40*
32K
80 x 30
8 x 16
640 x 480
50.350
31.5
60