Specifications

CHAPTER 2
Hardware Design
Video System 23
Note
The modes listed in Table 2-4 apply to the PC display connected to the
system, or to the second Macintosh display, if you have elected to use
the 12” or 7” card as a secondary Macintosh display card. ◆
Table 2-4 Monitors and display modes supported
Monitor
Resolution
(pixels)
Horizontal
scan (kHz)
Vertical
refresh (Hz)
Maximum color depth
(bits per pixel)
1 MB
video DRAM
2 MB
video DRAM
21” color 1152 × 870 68.681 75.062 8 8
21” 2-page (mono) 1152 × 870 68.681 75.062 8 8
19” RGB 1024 × 768 60.241 74.927 8 8
16” color 832 × 624 49.725 74.550 16 16
15” RGB portrait 640 × 870 68.850 75 8 8
13” color 640 × 480 35 66.667 16 32
12” mono 640 × 480 35 66.667 8 8
Multi Scan 15” 640 × 480
832 × 624
35
49.725
66.667
74.550
16
16
32
16
Multi Scan 17” 640 × 480
832 × 624
1024 × 768
35
49.725
60.241
66.667
74.55
74.927
16
16
8
32
16
8
Multi Scan 20” 640 × 480
832 × 624
1024 × 768
1152 × 870
1280 × 1024
35
49.725
60.241
68.681
79.976
66.667
74.55
74.927
75.062
75.025
16
16
8
8
4
32
16
8
8
4
VGA 640 × 480 31.463 60 16 32
SVGA 800 × 600 35.156 55.98 16 32
VESA 800 × 600
800 × 600
800 × 600
1024 × 768
1024 × 768
1024 × 768
1280 × 960
1280 × 1024
1280 × 1024
37.879
48.077
46.875
48.363
56.476
60.023
75
65.625
79.976
60.3165
72.188
75
60
70
75
75
60
75.025
16
16
16
8
8
8
4
4
4
32
16
16
16
16
8
4
8
4