System Video; Crt Display Mode (Crt Only) - NEC VERSA 4000 Service Manual

SYSTEM VIDEO

The system's LCD operates using the Chips and Technologies 65545B1-5 or 65545B2-H
VGA Controller. Video signals travel from the controller through the system's 15-pin D-
SUB connector using 5 volts.
System video integrates a 32-bit VL-bus interface using local bus video. The system ships
with 1 MB Video RAM (VRAM). It also supports video modes up to 1024 x 768 with 256
colors in CRT mode.
Table Section 1-2 lists CRT display modes..
Table Section 1-2
Mode Display
(Hex) Mode
0, 1 Text
0*, 1* Text
0**, 1** Text
2, 3 Text
2*, 3* Text
2**, 3** Text
4,5* Graphics
6 Graphics
7* Text
7** Text
D Planar
E Planar
F Planar
10 Planar
11 Planar
12 Planar
12*** Planar
13 Packed
Pixel
20 4-bit linear 16
NOTE: Interlaced video modes are represented
with the letter I in the table below.

CRT Display Mode (CRT only)

Text
Colors Display
16 40x25
16 40x25
16 40x25
16 80x25
16 80x25
16 80x25
4 40x25
2 80x25
Mono 80x25
Mono 80x25
16 40x25
16 80x25
Mono 80x25
16 80x25
2 80x30
16 80x30
16 80x30
256 40x25
80x30
Technical Information
Resolution Font
320x200 8x8
320x200 8x14
360x400 9x16
640x200 8x8
640x350 8x14
720x400 9x16
320x200 8x8
640x200 8x8
720x350 9x14
720x400 9x16
320x200 8x8
640x200 8x8
640x350 8x14
640x350 8x14
6400x480 8x16
640x480 8x16
640x480 8x16
320x200 8x8
640x480 8x16
1-7
Refresh
Rate
70
70
70
70
70
70
70
70
70
70
70
70
70
70
60
60
74
70
60