Technical information

CHAPTER 3
Devices and Ports
External Monitors 51
The computer includes 8 MB of video memory, which is enough to provide
pixel depths up to 24 bits per pixel on all supported monitors. When an external
video monitor and the flat panel display are operating at the same time, half the
video memory is available for each. In that case, the maximum pixel depth
available on the external monitor at the 1280-by-960 and 1280-by-1024 picture
sizes is only 16 bpp.
Monitor Connector 3
The connector is a standard DB9/15 connector for use with a VGA, SVGA, or
XGA monitor. Figure 3-7 shows the pin configurations and Table 3-11 lists the
signal pin assignments.
Figure 3-7 Signal pins on the video connector
Monitor Adapter 3
The computer comes with a monitor adapter that allows the user to connect a
standard Apple monitor cable to the computer. The Apple part number for the
adapter is 590-1118.
To identify the type of monitor connected, the computer first determines
whether the adapter is connected. It does this by checking pin 11; on the
1280 by 960 75 Hz 24 bpp 16 bpp
1280 by 1024 60 Hz 24 bpp 16 bpp
1280 by 1024 75 Hz 24 bpp 16 bpp
Table 3-10 Picture sizes supported (continued)
Picture size (pixels) Frame rate
Pixel depth,
flat panel
inactive
Pixel depth,
flat panel
active
12345
678910
11 12 13 14 15