http://bugs.freedesktop.org/show_bug.cgi?id=25938
--- Comment #4 from Andrea Tacconi <[email protected]> 2010-01-13 03:05:55 PST --- From apple documentation: http://developer.apple.com/legacy/mac/library/documentation/Hardware/Developer_Notes/Macintosh_CPUs-G4/iMac_Sep03/03_Input-Output/q26bc_inout.html#//apple_ref/doc/uid/TP40000875-CH207-DontLinkElementID_14 Video Monitor Port The iMac computer has a port for an external video monitor and supports video mirroring mode. Video mirroring mode displays the same information on both monitors, enabling the control of a presentation on one display, while allowing an audience to watch the presentation on a second display or projector. Due to display mirroring, the external monitor could have black borders during mirroring, depending on the supported timings between the two displays and on the monitor’s selection algotithm. Both displays show full-sized images only when the display resolution for the second monitor is set to the first display’s native resolution: 1440x900 on the 17-inch display and 1024x768 on the 15-inch display. The external monitor supports user-selectable display sizes up to 1600x1200 at 75 Hz. Monitor Connector The video display connector is a 14-pin rectangular connector, Hosiden TCX3143, or compatible. The connector accepts either a VGA adapter or a composite adapter. The system requires a composite adapter to use composite output over this connector. The connector pins are identified in Table 3-3. Figure 3-3 Video display connector Video display connector The pins and signals are listed in Table 3-8. An adapter is available for use with monitors with VGA 15-pin miniature D-type connectors. Table 3-8 Video signals for a VGA R-G-B display Pin Signal name 1 Ground 2 VSync 3 Hsync 4 Red return 5 Red video 6 Green return 7 Green video 8 +5 volts 9 Blue video 10 DDC data 11 DDC clock 12 Ground 13 /Cable detect 14 Blue return The cable detect function on pin 13 is implemented by connecting pin 13 to ground in the display cable. The computer gathers the display's capabilities by reading its EDID (Extended Display Identification Data) via DDC. The video display connector is compliant with the VESA specification. Video Display Adapter The iMac computer detects the type of display adapter that is plugged in and programs the graphics IC to route the appropriate video signals to the connector. The signal assignments on the video connector when the composite adapter is attached are shown in Table 3-9. Table 3-9 Video signals for a TV display Pin Signal name 1 Ground 2 n.c. 3 n.c. 4 Ground 5 S-video C 6 Ground 7 S-video Y 8 +5 volts 9 Composite video 10 DDC data 11 DDC clock 12 Ground 13 Ground (for /Cable Detect) 14 Ground Composite video and S-video signals can be displayed on either an NTSC display or a PAL display. When a display is connected by way of the composite adapter, the computer detects this configuration and enables the composite and S-video outputs. The settings for the resolutions and standards (NTSC or PAL) are then selectable in System Preferences. -- Configure bugmail: http://bugs.freedesktop.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug. _______________________________________________ Nouveau mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/nouveau
