Appendix A Video Modes; Vga Standard Modes - NEC Versa 2500 Series Service Manual

Appendix A
Video Modes
The C&T 65548 VGA chipset supports high resolution fixed frequency and variable fre-
quency analog monitors in interlaced and non-interlaced modes of operation. Digital moni-
tor support is also built-in. The tables in this section list all 65548 CRT monitor video
modes.

VGA STANDARD MODES

The following table lists VGA standard modes.
Hex No. of
Mode Colors
0, 1 16
2, 3 16
7 Mono
NOTE: The letter "I" under the Hex Mode col-
umn for the succeeding tables denotes Interlaced
monitors.
Table A-1 VGA Standard Modes (Text Mode)
Text Font Pixel
Display Size Resolution
40 x 25 9 x 16 360 x 400
40 x 25 8 x 14 320 x 350
40 x 25 8 x 8 320 x 200
80 x 25 9 x 16
80 x 25 8 x 14
80 x 25 8 x 8
80 x 25 9 x 16
80 x 25 9 x 14
80 x 25 9 x 8
Dot
Clock
MHz
28.322
25.175
25.175
720 x 400 28.322
640 x 350 25.175
640 x 200 25.175
720 x 400 28.322
720 x 350
720 x 350
Horiz. Vert.
Freq. Freq.
KHz Hz
31.5 70
31.5 70
31.5 70